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Dietary supplement

Let's Immunify! Kids Ingredients & Drug Interactions

by Soria Natural

Let's Immunify! Kids label
See full label image
Liquid Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Let's Immunify! Kids against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Let's Immunify! Kids is a dietary supplement by Soria Natural with 4 active ingredients. Its ingredients are commonly taken for common cold and immune support, antioxidant support, skin health and collagen formation.Based on those ingredients, 386 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin C, Probiotic Blend. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Let's Immunify! Kids by Soria Natural

Ask about any prescription or over-the-counter medication and we check it for interactions with Let's Immunify! Kids by Soria Natural — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Let's Immunify! Kids by Soria Natural

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 13, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 3 of its 8 active ingredients.
  • “Probiotic Blend” is a proprietary blend — the label gives one combined amount (17.50 mg) without saying how much of each component you get.

Let's Immunify! Kids contains 8 ingredients, including 5 active ones: vitamin C (an antioxidant vitamin), lactoferrin (a protein found naturally in breast milk and saliva that supports immune function), and four different Lactobacillus species plus oyster mushroom as components of the probiotic blend.

The product also holds several inactive ingredients—water, white grape must concentrate, maltodextrin, artificial strawberry flavor, and potassium sorbate—that serve as the liquid base and preservatives.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: Immune system support for children.
  • We looked for evidence on: Common cold, Antibiotic-associated diarrhea, Helicobacter pylori, Acne, Atopic disease, Asthma — and 4 related terms.
  • The strongest evidence on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Antibiotic-associated diarrhea (Natural Medicines).
  • Also on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Helicobacter pylori.
  • Also on file: Lactobacillus Acidophilus is rated "Possibly Ineffective" for Atopic disease.

Vitamin C in this product is effective for preventing vitamin C deficiency and possibly effective for several other uses including anemia of chronic disease, atrial fibrillation, cataracts, and reducing respiratory infections tied to heavy exercise. Lactoferrin is possibly effective for sepsis and pregnancy-related iron deficiency, though it was found likely ineffective for reducing fetal and premature infant mortality or necrotizing enterocolitis (a serious bowel condition in newborns).

Lactobacillus acidophilus is possibly effective for irritable bowel syndrome, Helicobacter pylori infection, antibiotic-associated diarrhea, and bacterial vaginosis, though it was found possibly ineffective for atopic disease. We don't have enough evidence in our data to rate Lactobacillus bulgaricus for most conditions, and we could not assess the effectiveness of Lactobacillus rhamnosus, Lactobacillus casei, Lactobacillus plantarum, or oyster mushroom because the evidence isn't established in the data we hold.

The evidence, ingredient by ingredient Vitamin C Lactoferrin Lactobacillus Acidophilus Lactobacillus Delbrueckii

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 4 of the 4 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 4 of 4.
  • General safety write-ups exist for 4 of 4.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin C is generally well tolerated at normal supplement doses, though doses above 2 grams daily raise the risk of side effects—mainly abdominal cramps, heartburn, diarrhea, nausea, vomiting, and headache. People prone to kidney stones should be cautious, as high-dose vitamin C increases that risk.

Lactoferrin is generally well tolerated in typical doses, though higher doses (7.2 grams daily) can cause constipation, diarrhea, anorexia, and fatigue; long-term safety data are limited. Lactobacillus acidophilus is generally well tolerated in healthy children and adults, though gastrointestinal side effects like bloating, flatulence, and diarrhea can occur, albeit rarely.

A few cases of serious infection from Lactobacillus species have been reported, mostly in very ill or immunocompromised patients. Lactobacillus bulgaricus is generally well tolerated in healthy people; immunocompromised individuals should use caution.

For pregnancy, vitamin C at normal dietary amounts is likely safe, but high-dose supplements should be avoided unless your doctor advises otherwise. Lactoferrin is likely safe in pregnancy and lactation.

Lactobacillus acidophilus is possibly safe in pregnancy, though data are limited. Safety data for Lactobacillus bulgaricus in pregnancy and lactation are not on file.

Side effects, ingredient by ingredient Vitamin C Lactoferrin Lactobacillus Acidophilus Lactobacillus Delbrueckii

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 3 of the 4 matched ingredients can interact with medications — Lactobacillus Acidophilus, Vitamin C, Lactobacillus Delbrueckii.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; cancer treatments.
  • For scale: 386 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before giving this product to your child, double-check these medication types with your child's doctor or pharmacist: estrogens (birth control and hormone therapy)—vitamin C may raise blood levels; chemotherapy drugs like alkylating agents and antitumor antibiotics—vitamin C's antioxidant effects might reduce their effectiveness; the blood thinner warfarin—vitamin C can lower its levels; levothyroxine (thyroid medication)—vitamin C may increase absorption; the HIV medication indinavir—vitamin C may lower its levels; the antipsychotic fluphenazine—one case report suggests vitamin C may lower its levels; and any antibiotics—the probiotics in this product may lose effectiveness if taken at the same time.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product is designed to support immune function in children with vitamin C, lactoferrin, and multiple probiotic strains. If your child takes any prescription medications—especially birth control or hormone therapy, chemotherapy drugs, blood thinners, thyroid medication, HIV medication, or antibiotics—check with your child's doctor or pharmacist before starting this product.

It's generally well tolerated at the doses used here, but vitamin C at very high amounts can cause stomach upset and increase kidney stone risk in susceptible people.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 4 of 8 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 27, 2021.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Let's Immunify! Kids, straight from the product label.

Brand Soria Natural
Barcode (UPC) 8422947316143
Net contents 3.7 fl. Oz.; 110 mL
Market status On market
Date entered into DSLD Jul 27, 2021
DSLD ID 250796
Product type Other Combinations
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Children 4 or More Years of Age, Vegetarian, Children more than 1 but less than 4
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Let's Immunify! Kids by Soria Natural, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
0.5 Bottle(s), 1 Bottle(s)
Maximum serving Sizes:
0.5 Bottle(s), 1 Bottle(s)
Servings per container
10
UPC/BARCODE
8422947316143
IngredientAmount% DV
Calories5 Calorie(s), 10 Calorie(s)--
Total Carbohydrates2 Gram(s), 3 Gram(s)1%, 1%
Vitamin C10 mg, 20 mg67%, 22%
Added Sugars1 Gram(s), 2 Gram(s)4%, 4%
Total Sugars1 Gram(s), 2 Gram(s)--
Lactoferrin35 mg, 70 mg--
Lactobacillus rhamnosus0 NP, 0 NP--
Lactobacillus acidophilus0 NP, 0 NP--
Lactobacillus casei0 NP, 0 NP--
Lactobacillus plantarum0 NP, 0 NP--
Lactobacillus bulgaricus0 NP, 0 NP--
Oyster Mushroom1000 mg, 2000 mg--
Probiotic Blend17.5 mg, 35 mg--

Other ingredients: Water, white Grape must concentrate, Maltodextrin, artificial Strawberry flavor, Potassium Sorbate

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements

Efficacy and quality

10 single bottles - 0.4 fl. oz. (11 mL) Servings Per Container 20 (age 1-3 years)/Servings Per Container 10 (age 4+ years)

Cap Powder deposit Bottle Liquid deposit Exclusive Product design

Formulation

Immunity booster

Made in Spain

Helps boost natural defenses Helps maintain intestinal flora Antioxidant support

Vegetarian

GMO Free

Formula

For ages 1+

White grapes and oyster mushroom

A unique formulation that brings together the benefits of oyster mushroom, white grapes and our exclusive pre & probiotic blend to help boost and support a healthy immune system.

FDA Statement of Identity

Dietary Supplement

Precautions

Contains milk.

To report a serious adverse event, contact 1-866-641-5222.

May contain traces of soy.

Precautions: Do not use as a substitute for a well-balanced diet and a healthy lifestyle. Do not exceed the recommended serving.

Do not use in individuals with hypersensitivity or allergy to any of its ingredients.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Suggested Use: Children 1-3 years old: Take half a bottle a day (5.5 ml), directly or diluted in a glass of water or fruit juice. Children 4+ years old: Take 1 bottle a day (11 ml), directly or diluted in a glass of water or fruit juice.

1 Pull up the tab and remove the guarantee seal under the cap. 2 Twist the cap to the right until you hear a click sound and shake well to mix all ingredients. 3 Twist the cap to the left to open the bottle and enjoy its benefits alone or diluted with your favorite water or juice. 4 Bottle opening instructions

Storage

Store in a cool and dry place.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, cure or prevent any disease.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Let's Immunify! Kids by Soria Natural label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Let's Immunify! Kids label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Let's Immunify! Kids by Soria Natural

These are the 4 active ingredients this product is made of. Select any to open its full monograph.

Serving size0.5 Bottle(s) Dosage formLiquid Servings per container10 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Vitamin C

Interacts with
207 drugs
10 mg per serving Form: Ascorbic Acid

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for im...

Vitamin C monograph & interactions

Lactoferrin

No known
interactions
35 mg per serving

Lactoferrin is an iron-binding protein found naturally in milk and other body fluids, and supplements are usually made from cow's milk or rice. It is...

Lactoferrin monograph & interactions

Oyster Mushroom

1000 mg per serving Form: Polysaccharide complex

Probiotic Blend

Interacts with
182 drugs
17.5 mg per serving

Lactobacillus acidophilus is a 'friendly' bacterium used as a probiotic to support gut and vaginal health. It is generally well tolerated in healthy p...

Probiotic Blend monograph & interactions

Other (inactive) ingredients: Water, White Grape must concentrate, Maltodextrin, Artificial Strawberry flavor, Potassium Sorbate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Let's Immunify! Kids by Soria Natural Drug Interactions

Want to check YOUR meds against Let's Immunify! Kids?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
386Drugs
280 Moderate 106 Minor

Ingredients driving the most interactions

Vitamin C 207
Probiotic Blend 182

Individual Drug Interactions

The ingredients in Let's Immunify! Kids interact with 386 drugs. Click any drug to see the details.

2 of the 4 ingredients in Let's Immunify! Kids interact with drugs. Each result below shows which ingredient is responsible. Vitamin C Probiotic Blend

Each ingredient & the kinds of drugs it affects

For each ingredient in Let's Immunify! Kids with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Vitamin C13 drug types · 207 drugs

Alkylating Agents

Theoretically, antioxidant effects of vitamin C might reduce the effectiveness of alkylating agents.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Aluminum

Vitamin C can increase the amount of aluminum absorbed from aluminum compounds.
Research in animals and humans shows that vitamin C increases aluminum absorption, theoretically by chelating aluminum and keeping it in solution where it is available for absorption. In people with normal renal function, urinary excretion of aluminum will likely increase, making aluminum retention and toxicity unlikely. Patients with renal failure who take aluminum-containing compounds such as phosphate binders should avoid vitamin C supplements in doses above the recommended dietary allowances.

Likelihood Probable Evidence B
Antitumor Antibiotics

Theoretically, the antioxidant effects of vitamin C might reduce the effectiveness of antitumor antibiotics.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as doxorubicin. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effects, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Estrogens

Vitamin C might increase blood levels of estrogens.
Increases in plasma estrogen levels of up to 55% occur under some circumstances when vitamin C is taken concurrently with oral contraceptives or hormone replacement therapy, including topical products. It is suggested that vitamin C prevents oxidation of estrogen in the tissues, regenerates oxidized estrogen, and reduces sulfate conjugation of estrogen in the gut wall. When tissue levels of vitamin C are high, these processes are already maximized and supplemental vitamin C does not have any effect on estrogen levels. Increases in plasma estrogen levels may occur when patients who are deficient in vitamin C take supplements. Monitor these patients for estrogen-related side effects.

Likelihood Probable Evidence B
Fluphenazine (Prolixin)

Theoretically, vitamin C might decrease levels of fluphenazine.
In one patient there was a clinically significant decrease in fluphenazine levels when vitamin C (500 mg twice daily) was started. The mechanism is not known, and there is no further data to confirm this interaction.

Likelihood Possible Evidence D
Indinavir (Crixivan)

Vitamin C can modestly reduce indinavir levels.
One pharmacokinetic study shows that taking vitamin C 1 gram orally once daily along with indinavir 800 mg orally three times daily reduces the area under the concentration-time curve of indinavir by 14%. The mechanism of this interaction is unknown, but it is unlikely to be clinically significant in most patients. The effect of higher doses of vitamin C on indinavir levels is unknown.

Likelihood Probable Evidence B
Levothyroxine (Synthroid, Others)

Vitamin C can increase levothyroxine absorption.
Two clinical studies in adults with poorly controlled hypothyroidism show that swallowing levothyroxine with a glass of water containing vitamin C 500-1000 mg in solution reduces thyroid stimulating hormone (TSH) levels and increases thyroxine (T4) levels when compared with taking levothyroxine alone. This suggests that vitamin C increases the oral absorption of levothyroxine, possibly due to a reduction in pH.

Likelihood Probable Evidence B
Warfarin (Coumadin)

High-dose vitamin C might reduce the levels and effectiveness of warfarin.
Vitamin C in high doses may cause diarrhea and possibly reduce warfarin absorption. There are reports of two people who took up to 16 grams daily of vitamin C and had a reduction in prothrombin time. Lower doses of 5-10 grams daily can also reduce warfarin absorption. In many cases, this does not seem to be clinically significant. However, a case of warfarin resistance has been reported for a patient who took vitamin C 500 mg twice daily. Cessation of vitamin C supplementation resulted in a rapid increase in international normalized ratio (INR). Tell patients taking warfarin to avoid taking vitamin C in excessively high doses (greater than 10 grams daily). Lower doses may be safe, but the anticoagulation activity of warfarin should be monitored. Patients who are stabilized on warfarin while taking vitamin C should avoid adjusting vitamin C dosage to prevent the possibility of warfarin resistance.

Likelihood Possible Evidence D
Acetaminophen (Tylenol, Others)

High-dose vitamin C might slightly prolong the clearance of acetaminophen.
A small pharmacokinetic study in healthy volunteers shows that taking high-dose vitamin C (3 grams) 1.5 hours after taking acetaminophen 1 gram slightly increases the apparent half-life of acetaminophen from around 2.3 hours to 3.1 hours. Ascorbic acid competitively inhibits sulfate conjugation of acetaminophen. However, to compensate, elimination of acetaminophen glucuronide and unconjugated acetaminophen increases. This effect is not likely to be clinically significant.

Likelihood Probable Evidence B
Aspirin

Acidification of the urine by vitamin C might increase aspirin levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction is not clinically significant.

Likelihood Possible Evidence B
Choline Magnesium Trisalicylate (Trilisate)

Acidification of the urine by vitamin C might increase choline magnesium trisalicylate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Niacin

Vitamin C might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as vitamin C, or to the combination. It also is not known whether it will occur in other patient populations.

Likelihood Possible Evidence A
Salsalate (Disalcid)

Acidification of the urine by vitamin C might increase salsalate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams/day vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Vitamin C full monograph & interactions

Probiotic Blend1 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L. acidophilus.
L. acidophilus preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms. Tell patients to separate administration of antibiotics and L. acidophilus preparations by at least two hours.

Likelihood Probable Evidence D
Probiotic Blend full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Let's Immunify! Kids, from the product label.

Soria Natural

See all Soria Natural products
Name
Naturali LLC.
Street Address
600 Ave.
City
Munoz Rivera
State
San Juan
ZipCode
00918
Phone Number
1-866-641-5222
Pharmacist Counseling Corner

Let's Immunify! Kids by Soria Natural: Common Questions

Does Let's Immunify! Kids by Soria Natural interact with any medications?
Yes. Based on its ingredients, Let's Immunify! Kids has a known interaction with 386 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Let's Immunify! Kids contains 4 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is this product safe for my child if they're taking an antibiotic?
The probiotics in this product may lose their live organisms if taken at the same time as antibiotics, since antibiotics can kill them. Talk with your child's doctor or pharmacist—they may recommend giving the antibiotic and this product several hours apart.
What does lactoferrin do?
Lactoferrin is a protein found naturally in breast milk, saliva, and tears that plays a role in immune function. It's possibly effective for sepsis and pregnancy-related iron deficiency, though it was found unlikely to help prevent infant mortality or necrotizing enterocolitis.
Can I give this to my child if they take birth control or hormone therapy?
Vitamin C in this product may increase blood levels of estrogens from birth control pills or hormone replacement therapy by up to 55% under some circumstances. Check with your doctor or pharmacist before starting.
What are the most common side effects of vitamin C in this product?
At the doses in this product, vitamin C is generally well tolerated. Stomach upset, diarrhea, nausea, and headache are most common when doses go above 2 grams daily. Children on typical supplement doses are unlikely to experience these.
Is it safe to use if my child is pregnant or breastfeeding?
Vitamin C at normal dietary amounts is likely safe during pregnancy, but high-dose supplements should be avoided unless a doctor advises otherwise. Lactoferrin is likely safe in both pregnancy and breastfeeding. Safety data for the other probiotics in pregnancy and lactation are either limited or not on file—talk with your healthcare provider for personalized advice.
Does this product have any fillers?
Yes, this liquid product contains inactive ingredients: water, white grape must concentrate, maltodextrin, artificial strawberry flavor, and potassium sorbate as the base and preservatives.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Let's Immunify! Kids label
Go deeper

The Full Monographs Behind Let's Immunify! Kids’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Vitamin C

Interacts with 207 drugs

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for immune function, collagen, and acts as an...

Read the full Vitamin C monograph → Herb & supplement monograph

Lactoferrin

Lactoferrin is an iron-binding protein found naturally in milk and other body fluids, and supplements are usually made from cow's milk or rice. It is being studied for immune support, iron l...

Read the full Lactoferrin monograph → Herb & supplement monograph

Lactobacillus Acidophilus

Interacts with 182 drugs

Lactobacillus acidophilus is a 'friendly' bacterium used as a probiotic to support gut and vaginal health. It is generally well tolerated in healthy people, and there is reasonable evidence...

Read the full Lactobacillus Acidophilus monograph → Herb & supplement monograph

Lactobacillus Delbrueckii

Interacts with 182 drugs

Lactobacillus delbrueckii is a 'friendly' bacterium used in food fermentation and sold as a probiotic, often as part of multi-strain products. It is generally considered safe for healthy peo...

Read the full Lactobacillus Delbrueckii monograph →
Sources

Sources & How We Checked

Let's Immunify! Kids's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 81 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Vitamin C 51 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Back DJ, Breckenridge AM, MacIver M, et al. Interaction of ethinyloestradiol with ascorbic acid in man. Br Med J (Clin Res Ed) 1981;282:1516.
  3. Morris JC, Beeley L, Ballantine N. Interaction of ethinyloestradiol with ascorbic acid in man [letter]. Br Med J (Clin Res Ed) 1981;283:503.
  4. Labriola D, Livingston R. Possible interactions between dietary antioxidants and chemotherapy. Oncology 1999;13:1003-8.
  5. Dwyer JH, Merz NB, Shirocre AM, et al. Progression of early atherosclerosis and intake of vitamin C and vitamin E from supplements and food. The Los Angeles Atherosclerosis Study. 41st Annual Conference on Cardiovascular Disease Epidemiology and Prevent
  6. Levine M, Rumsey SC, Daruwala R, et al. Criteria and recommendations for vitamin C intake. JAMA 1999;281:1415-23. PubMed
  7. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  8. Segal S, Kaminski S. Drug-nutrient interactions. American Druggist 1996 Jul;42-8.
  9. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: National Academy Press, 2000. Available at: http://www.nap.edu/books/0309069351/html/.
  10. Houston JB, Levy G. Drug biotransformation interactions in man VI: Acetaminophen and ascorbic acid. J Pharm Sci 1976;65:1218-21. PubMed
  11. Brown BG, Zhao XQ, Chait A, et al. Simvastatin and niacin, antioxidant vitamins, or the combination for the prevention of coronary disease. N Engl J Med 2001;345:1583-93. DOI
  12. Rosenthal G. Interaction of ascorbic acid and warfarin. JAMA 1971;215:1671. DOI
  13. Hume R, Johnstone JM, Weyers E. Interaction of ascorbic acid and warfarin. JAMA 1972;219:1479. DOI
  14. Smith EC, Skalski RJ, Johnson GC, Rossi GV. Interaction of ascorbic acid and warfarin. JAMA 1972;221:1166. DOI
  15. Traxer O, Huet B, Poindexter J, et al. Effect of ascorbic acid consumption on urinary stone risk factors. J Urol 2003;170:397-401.. PubMed
  16. Domingo JL, Gomez M, Llobet JM, Richart C. Effect of ascorbic acid on gastrointestinal aluminum absorption (letter). Lancet 1991;338:1467.
  17. Domingo JL, Gomez M, Llobet JM, Corbella J. Influence of some dietary constituents on aluminum absorption and retention in rats. Kidney Int 1991;39:598-601. PubMed
  18. Partridge NA, Regnier FE, White JL, Hem SL. Influence of dietary constituents on intestinal absorption of aluminum. Kidney Int 1989;35:1413-7. PubMed
  19. Mc Leod DC, Nahata MC. Inefficacy of ascorbic acid as a urinary acidifier (letter). N Engl J Med 1977;296:1413. DOI
  20. Hansten PD, Hayton WL. Effect of antacid and ascorbic acid on serum salicylate concentration. J Clin Pharmacol 1980;20:326-31. PubMed
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Lactoferrin 6 references
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Lactobacillus Acidophilus 15 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Begtrup LM, de Muckadell OB, Kjeldsen J, Christensen RD, Jarbøl DE. Long-term treatment with probiotics in primary care patients with irritable bowel syndrome--a randomised, double-blind, placebo controlled trial. Scand J Gastroenterol 2013;48(10):1127-35 PubMed
  3. Chatterjee S, Kar P, Das T, Ray S, Gangulyt S, Rajendiran C, Mitra M. Randomised placebo-controlled double blind multicentric trial on efficacy and safety of Lactobacillus acidophilus LA-5 and Bifidobacterium BB-12 for prevention of antibiotic-associated
  4. Shavakhi A, Tabesh E, Yaghoutkar A, Hashemi H, Tabesh F, Khodadoostan M,Minakari M, Shavakhi S, Gholamrezaei A. The effects of multistrain probiotic compound on bismuth-containing quadruple therapy for Helicobacter pylori infection: a randomized placebo-c
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See these in context on the Lactobacillus Acidophilus monograph →

Lactobacillus Delbrueckii 9 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  3. Ranchal P, Gupta R, Goldberg R, A Lobo S, Pascual A, El Khoury MY. Penicillin-sensitive Lactobacillus jensenii bacteremia. Am J Ther 2021;28(2):e250-e252. PubMed
  4. Grazioli-Gauthier L, Rigamonti E, Leo LA, Martinetti Lucchini G, Lo Priore E, Bernasconi E. Lactobacillus jensenii mitral valve endocarditis: Case report, literature review and new perspectives. IDCases 2022;27:e01401. PubMed
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See these in context on the Lactobacillus Delbrueckii monograph →

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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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