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Dietary supplement

IGF-1 Lemon Flavor Ingredients & Drug Interactions

by NOW Sports

IGF-1 Lemon Flavor label
See full label image
Liquid Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking IGF-1 Lemon Flavor 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

IGF-1 Lemon Flavor is a dietary supplement by NOW Sports with 2 active ingredients. Its ingredients are commonly taken for sugar substitute / sweetener, blood sugar support in diabetes, weight management.Based on those ingredients, 311 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Stevia extract, Deer Antler Velvet extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against IGF-1 Lemon Flavor by NOW Sports

Ask about any prescription or over-the-counter medication and we check it for interactions with IGF-1 Lemon Flavor by NOW Sports — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of IGF-1 Lemon Flavor by NOW Sports

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 6, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 2 of its 2 active ingredients.
  • “IGF-1” is listed as a grouped ingredient — the label gives one combined amount (27.50 ng) without saying how much of each component you get.

NOW Sports IGF-1 Lemon Flavor is a 2-ingredient liquid with stevia extract (a sweetener derived from the stevia plant) and deer antler velvet extract. The inactive ingredients are water, vegetable glycerin, xylitol, natural lemon flavor, phospholipids, citric acid, and potassium sorbate.

IGF-1 itself is listed as a blend or group container, meaning its component ingredients are detailed separately in the product.

Does it work?

Couldn't assess
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
Not assessable

The label doesn't state a purpose we can grade — see each ingredient's own graded uses on its monograph instead.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we hold on these ingredients doesn't establish clear effectiveness. Stevia has insufficient reliable evidence for diabetes, high blood pressure, or weight loss.

Deer antler velvet extract is similarly lacking solid evidence for wound healing, heart disease, high blood pressure, bone strength, sexual function, or slowing aging. We cannot comment on effectiveness based on the data available to us.

The evidence, ingredient by ingredient Stevia Deer Velvet

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 1 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Stevia extract appears well tolerated overall. In the short term, minor side effects like belly bloating, dizziness, headache, muscle ache, nausea, and numbness may occur but tend to go away after the first week.

Allergic reactions are rare. The data distinguishes between purified stevia (used in food amounts, generally recognized as safe) and supplement-dose or whole-leaf forms, which lack thorough safety study — use caution with higher doses.

Deer antler velvet extract appears generally well tolerated in short-term use, but long-term safety and product quality haven't been well studied. Pregnancy safety data advises against use during pregnancy.

The same applies to breastfeeding — there isn't enough safety information.

Side effects, ingredient by ingredient Stevia Deer Velvet

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?
  • 2 of the 2 matched ingredients can interact with medications — Stevia, Deer Velvet.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications; lithium.
  • For scale: 311 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 taking this product, double-check if you're on lithium (Moderate interaction risk with stevia), blood pressure medications, diabetes drugs, contraceptives, or estrogen medications (all Minor risk with stevia or deer antler velvet). Your doctor or pharmacist can review your full list and decide if it's safe to combine.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product may interest people looking for an IGF-1 supplement, but if you take lithium, blood pressure medications, diabetes medications, birth control, or estrogen therapy, you need to check it with your doctor or pharmacist first. Deer antler velvet extract is best avoided if you're pregnant or breastfeeding.

Talk it over with your own healthcare provider before starting.

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

Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 23, 2019.

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 IGF-1 Lemon Flavor, straight from the product label.

Brand NOW Sports
Barcode (UPC) 733739032010
Net contents 1 fl. Oz.; 30 mL
Market status On market
Date entered into DSLD Aug 23, 2019
DSLD ID 205910
Product type Other Combinations
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult Male (18-50 Years), Gluten Free, Dairy Free
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 IGF-1 Lemon Flavor by NOW Sports, 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:
0.75 mL
Maximum serving Sizes:
0.75 mL
Servings per container
94
UPC/BARCODE
733739032010
IngredientAmount% DV
Stevia extract1.6 mg--
Deer Antler Velvet extract1.1 mg--
IGF-127.5 ng--

Other ingredients: de-ionized Water, Vegetable Glycerin, Xylitol, natural Lemon flavor, Phospholipids, Citric Acid, 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.
Suggested/Recommended/Usage/Directions

Suggested Usage: Shake well before use. Spray 2 times under tongue, hold momentarily, and then swallow. Consume 2 to 3 times daily as needed.

Formulation

Not manufactured with wheat, gluten, milk, egg, fish or shellfish ingredients.

Precautions

Not manufactured with wheat, gluten, milk, egg, fish or shellfish ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: For adults only.

Do not use if pregnant or nursing. Consult physician if taking medication or have a medical condition.

Keep out of reach of children.

Contains Xylitol, which is harmful to pets. If you are a competitive athlete who is regularly tested, please check with your sanctioning body for the status of IGF-1.

Formula

Contains Xylitol, which is harmful to pets.

Deer antler velvet extract

Men's Health

Storage

Natural color variation may occur in this product.

General Statements

Advanced absorption

Liposomal spray

“ng” is the abbreviation for nanograms (1 billionth of a gram).

FDA Statement of Identity

A Dietary Supplement

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

See for yourself

IGF-1 Lemon Flavor by NOW Sports label

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

IGF-1 Lemon Flavor 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 IGF-1 Lemon Flavor by NOW Sports

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size0.75 mL Dosage formLiquid Servings per container94 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.

Stevia extract

Interacts with
259 drugs
1.6 mg per serving

Stevia is a plant-based, calorie-free sweetener that is widely used as a sugar alternative and is considered safe in normal food amounts by major regu...

Stevia extract monograph & interactions

IGF-1

27.5 ng per serving

Other (inactive) ingredients: De-ionized Water, Vegetable Glycerin, Xylitol, Natural Lemon flavor, Phospholipids, Citric Acid, Potassium Sorbate. These complete the product’s ingredient list but are not active constituents.

Interaction report

IGF-1 Lemon Flavor by NOW Sports Drug Interactions

Want to check YOUR meds against IGF-1 Lemon Flavor?

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
311Drugs
1 Moderate 310 Minor

Ingredients driving the most interactions

Stevia extract 259
Deer Antler Velvet extract 52

Individual Drug Interactions

The ingredients in IGF-1 Lemon Flavor interact with 311 drugs. Click any drug to see the details.

2 of the 2 ingredients in IGF-1 Lemon Flavor interact with drugs. Each result below shows which ingredient is responsible. Stevia extract Deer Antler Velvet extract

Each ingredient & the kinds of drugs it affects

For each ingredient in IGF-1 Lemon Flavor 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.

Stevia extract3 drug types · 259 drugs

Lithium

Theoretically, stevia might decrease clearance and increase levels of lithium.
Animal research suggests that stevia extracts might have diuretic activity. Theoretically, increased reabsorption of lithium along with sodium might reduce excretion and increase levels of lithium.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, stevia might increase the risk for hypoglycemia when combined with antidiabetes drugs.
Preliminary clinical research in patients with type 2 diabetes suggests that taking a single dose of stevia extract 1000 mg reduces postprandial blood glucose levels when taken with a meal. However, other clinical research in patients with type 1 or type 2 diabetes suggests that taking stevioside 250 mg three times daily does not significantly affect blood glucose levels or glycated hemoglobin (HbA1C) after three months of treatment.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, combining stevia or stevia constituents with antihypertensive agents might increase the risk of hypotension.
Stevia extract and stevioside might lower blood pressure in patients with hypertension. However, other clinical research suggests that stevioside does not significantly lower blood pressure in patients with hypertension.

Likelihood Possible Evidence D
Stevia extract full monograph & interactions

Deer Antler Velvet extract2 drug types · 52 drugs

Contraceptive Drugs

Theoretically, deer velvet might interfere with the effectiveness of contraceptive drugs.
Laboratory research shows that deer velvet contains small quantities of estradiol and testosterone. While clinical research shows that taking deer velvet extract does not raise testosterone levels, estradiol levels were not measured.

Likelihood Unlikely Evidence D
Estrogens

Theoretically, deer velvet might increase the effects and side effects of estrogens.
Laboratory evidence shows that deer velvet contains small quantities of estradiol and testosterone. While clinical research shows that taking deer velvet extract does not raise testosterone levels, estradiol levels were not measured.

Likelihood Unlikely Evidence D
Deer Antler Velvet extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for IGF-1 Lemon Flavor, from the product label.

NOW Sports

See all NOW Sports products
Name
NOW Foods
Street Address
395 S. Glen Ellyn Rd.
City
Bloomingdale
State
IL
ZipCode
60108
Web Address
nowsportsproducts.com
Pharmacist Counseling Corner

IGF-1 Lemon Flavor by NOW Sports: Common Questions

Does IGF-1 Lemon Flavor by NOW Sports interact with any medications?
Yes. Based on its ingredients, IGF-1 Lemon Flavor has a known interaction with 311 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
IGF-1 Lemon Flavor contains 2 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.
Can I take this if I'm pregnant or breastfeeding?
The data advises against deer antler velvet extract during pregnancy and breastfeeding due to insufficient safety information. There's no pregnancy or lactation data on file for stevia in this product either. Talk with your doctor or pharmacist about whether this product is right for you during pregnancy or while breastfeeding.
What are the side effects of stevia extract?
Most common side effects are belly bloating, dizziness, headache, muscle ache, nausea, and numbness. These tend to clear up after the first week. Allergic reactions are rare. Stevia is generally well tolerated, especially in food amounts.
Is this product proven to work?
The evidence we hold does not establish clear effectiveness for stevia or deer antler velvet extract on any condition. Both ingredients have insufficient reliable evidence for the claims sometimes made about them.
What is deer antler velvet extract?
Deer antler velvet extract comes from the soft, cartilage tissue that covers young deer antlers. Lab analysis shows it contains trace amounts of estradiol and testosterone, which is why it can theoretically interact with hormone-related medications.
Is stevia extract safe?
Purified stevia in typical food amounts is generally recognized as safe. However, supplement doses and whole-leaf forms lack thorough safety study, so use caution with higher doses. Minor side effects like dizziness or headache may occur but usually resolve after the first week.
How well is deer antler velvet extract studied for safety?
It appears well tolerated in short-term use, but long-term safety and product quality haven't been well studied. More research is needed to know how safe it is over time.

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.

IGF-1 Lemon Flavor label
Go deeper

The Full Monographs Behind IGF-1 Lemon Flavor’s Ingredients

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

Herb & supplement monograph

Stevia

Interacts with 259 drugs

Stevia is a plant-based, calorie-free sweetener that is widely used as a sugar alternative and is considered safe in normal food amounts by major regulators. Purified stevia extracts have a...

Read the full Stevia monograph → Herb & supplement monograph

Deer Velvet

Interacts with 52 drugs

Deer velvet is a traditional remedy made from the soft, growing antlers of deer or elk, and it is most often promoted for energy, athletic performance, and joint health. Good-quality human e...

Read the full Deer Velvet monograph →
Sources

Sources & How We Checked

IGF-1 Lemon Flavor'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 12 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.

Stevia 10 references
  1. Chan P, Xu DY, Liu JC, et al. The effect of stevioside on blood pressure and plasma catecholamines in spontaneously hypertensive rats. Life Sci 1998;63:1679-84. PubMed
  2. Melis MS. A crude extract of Stevia rebaudiana increases the renal plasma flow of normal and hypertensive rats. Braz J Med Biol Res 1996;29:669-75.
  3. Melis MS. Chronic administration of aqueous extract of Stevia rebaudiana in rats: renal effects. J Ethnopharmacol 1995;47:129-34. PubMed
  4. Melis MS, Sainati AR. Effect of calcium and verapamil on renal function of rats during treatment with stevioside. J Ethnopharmacol 1991;33:257-622. PubMed
  5. Hsieh MH, Chan P, Sue YM, et al. Efficacy and tolerability of oral stevioside in patients with mild essential hypertension: a two-year, randomized, placebo-controlled study. Clin Ther 2003;25:2797-808. PubMed
  6. Chan P, Tomlinson B, Chen YJ, et al. A double-blind placebo-controlled study of the effectiveness and tolerability of oral stevioside in human hypertension. Br J Clin Pharmacol 2000;50:215-20. PubMed
  7. Gregersen S, Jeppesen PB, Holst JJ, Hermansen K. Antihyperglycemic effects of stevioside in type 2 diabetic subjects. Metabolism 2004;53:73-6. PubMed
  8. Barriocanal LA, Palacios M, Benitez G, et al. Apparent lack of pharmacological effect of steviol glycosides used as sweeteners in humans. A pilot study of repeated exposures in some normotensive and hypotensive individuals and in Type 1 and Type 2 diabeti
  9. Ferri LA, Alves-Do-Prado W, Yamada SS, et al. Investigation of the antihypertensive effect of oral crude stevioside in patients with mild essential hypertension. Phytother Res 2006;20:732-6. PubMed
  10. Almiron-Roig E, Navas-Carretero S, Castelnuovo G, et al. Impact of acute consumption of beverages containing plant-based or alternative sweetener blends on postprandial appetite, food intake, metabolism, and gastro-intestinal symptoms: Results of the SWEE

See these in context on the Stevia monograph →

Deer Velvet 2 references
  1. Sleivert, G., Burke, V., Palmer, C., Walmsley, A., Gerrard, D., Haines, S., and Littlejohn, R. The effects of deer antler velvet extract or powder supplementation on aerobic power, erythropoiesis, and muscular strength and endurance characteristics. Int PubMed
  2. Bubenik, G. A., Miller, K. V., Lister, A. L., Osborn, D. A., Bartos, L., and van der Kraak, G. J. Testosterone and estradiol concentrations in serum, velvet skin, and growing antler bone of male white-tailed deer. J Exp Zoolog.A Comp Exp Biol 3-1-2005;30 PubMed

See these in context on the Deer Velvet monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

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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