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Dietary supplement

Natural Soya Lecithin 300 mg Ingredients & Drug Interactions

by Solgar

Natural Soya Lecithin 300 mg label
See full label image
Softgel Capsule Category: Fat/fatty Acid
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 Natural Soya Lecithin 300 mg 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

Natural Soya Lecithin 300 mg is a dietary supplement by Solgar with 2 active ingredients. Its ingredients are commonly taken for high cholesterol, liver health, brain and memory support.Based on those ingredients, 102 medications have a known interaction with it, the most serious rated moderate. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Natural Soya Lecithin 300 mg by Solgar

Ask about any prescription or over-the-counter medication and we check it for interactions with Natural Soya Lecithin 300 mg by Solgar — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Natural Soya Lecithin 300 mg by Solgar

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 Jul 11, 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 3 of its 3 active ingredients.
  • “Lecithin” is listed as a grouped ingredient — the label gives one combined amount (1,800 mg) without saying how much of each component you get.

This softgel contains three active ingredients. Choline is an essential nutrient that supports brain health and cellular function throughout your body.

Inositol is a carbohydrate that plays a role in cell signaling and has been studied for hormonal and metabolic health. Lecithin is a blend of phospholipids — fatty compounds naturally found in plants — that work together with choline and inositol.

The capsule itself is made from gelatin, glycerin, and water.

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

This product doesn't appear to be marketed for a specific use, so we graded its ingredients' overall clinical evidence instead.

Moderate

Some clinical evidence supports its ingredients for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredients' overall clinical evidence instead.
  • On file: Polycystic ovary syndrome (PCOS) — rated "Possibly Effective" (Inositol) (Natural Medicines).
  • On file: Preterm labor — rated "Possibly Effective" (Inositol) (Natural Medicines).
  • On file: Metabolic syndrome — rated "Possibly Effective" (Inositol) (Natural Medicines).

The evidence varies by ingredient and condition. For choline, the data we hold shows it's possibly ineffective for athletic performance, and there's insufficient evidence for age-related cognitive decline, Alzheimer disease, hay fever, bronchitis, and a liver condition related to total parenteral nutrition (TPN).

For inositol, the picture is better: it's possibly effective for polycystic ovary syndrome (PCOS) and metabolic syndrome, and possibly effective for preventing preterm labor. However, it's possibly ineffective for anxiety and depression, and possibly ineffective for diabetic nerve pain (neuropathy).

The evidence, ingredient by ingredient Lecithin Choline Inositol

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 2 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.

Choline is well tolerated at normal doses but has a daily upper limit of 3.5 grams; exceeding that can cause fishy body odor, diarrhea, nausea, vomiting, and other gastrointestinal symptoms. Inositol is generally well tolerated, with the most common side effects being mild—diarrhea, gas, and nausea.

Regarding pregnancy and breastfeeding, choline is rated likely safe during pregnancy and lactation, though high-dose supplements should be used only as your doctor advises. Inositol has been studied in pregnancy but safety is not fully established; use only under medical supervision if you're pregnant or breastfeeding.

We hold no pregnancy or breastfeeding data for phosphorus or lecithin as a whole ingredient.

Side effects, ingredient by ingredient Lecithin Choline Inositol

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 — Inositol, Choline.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 102 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.

If you're on antidiabetes drugs, watch for signs of low blood sugar (hypoglycemia) and check your levels more often; inositol can lower blood glucose. If you take atropine, choline may theoretically reduce its effect — mention this combination to your pharmacist.

Run all your medications through the checker on this page before starting.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

This is a reasonable choice if you're looking to support brain and cellular health with established nutrients. If you take antidiabetes medication, atropine, or any other prescription drug, check your medications with the tool below first.

Pregnant or breastfeeding people should talk with their doctor or pharmacist before starting any supplement.

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

Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 26, 2020.

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 Natural Soya Lecithin 300 mg, straight from the product label.

Brand Solgar
Barcode (UPC) 033984015203
Net contents 100 Softgel(s)
Market status On market
Date entered into DSLD Feb 26, 2020
DSLD ID 214601
Product type Fat/fatty Acid
Supplement form Softgel Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Dairy Free, Sugar 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 Natural Soya Lecithin 300 mg by Solgar, 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:
6 Softgel(s)
Maximum serving Sizes:
6 Softgel(s)
Servings per container
16
UPC/BARCODE
033984015203
IngredientAmount% DV
Calories15 Calorie(s)--
Calories from Fat15 Calorie(s)--
Total Fat1.5 Gram(s)2%
Choline36 mg--
Inositol36 mg--
Lecithin1800 mg--
Phosphorus35 mg4%

Other ingredients: Gelatin, Glycerin, Water

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.
Formulation

Solgar's Soya Lecithin Softgels are unbleached, free of corn, yeast, wheat and dairy products and are formulated without the use of preservatives, artificial flavors or colors.

Sugar, salt and starch free

Storage

To assure freshness and potency, store at room temperature 15 degrees-30 degrees C (59 degrees-86 degrees F). Store away from heat, light and moisture.

Precautions

Do not use if outer bottle seal is missing, torn or damaged in any way.

If you are pregnant, nursing, taking any medication or have a medical condition, please consult your healthcare practitioner before taking any dietary supplement.

Keep out of reach of children.

General Statements

Solgar since 1947

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement for adults, take six (6) softgels daily, preferably at mealtime, or as directed by a healthcare practitioner.

Formula

Formulated for adults.

Natural Soya Lecithin 300 mg per softgel

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

See for yourself

Natural Soya Lecithin 300 mg by Solgar label

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

Natural Soya Lecithin 300 mg 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 Natural Soya Lecithin 300 mg by Solgar

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

Serving size6 Softgel(s) Dosage formSoftgel Capsule Servings per container16 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.

Lecithin

No known
interactions
1800 mg per serving Form: Soy

Lecithin is a natural fatty substance found in foods and made by the body that is widely used as a supplement and food emulsifier. Evidence supporting...

Lecithin monograph & interactions

Phosphorus

35 mg per serving Form: Lecithin

Other (inactive) ingredients: Gelatin, Glycerin, Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Natural Soya Lecithin 300 mg by Solgar Drug Interactions

Want to check YOUR meds against Natural Soya Lecithin 300 mg?

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
102Drugs
86 Moderate 16 Minor

Ingredients driving the most interactions

Individual Drug Interactions

The ingredients in Natural Soya Lecithin 300 mg interact with 102 drugs. Click any drug to see the details.

0 of the 2 ingredients in Natural Soya Lecithin 300 mg interact with drugs. Each result below shows which ingredient is responsible.

Each ingredient & the kinds of drugs it affects

For each ingredient in Natural Soya Lecithin 300 mg with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

The maker

Brand information

Manufacturer and brand details for Natural Soya Lecithin 300 mg, from the product label.

Solgar

See all Solgar products
Name
Solgar Vitamin and Herb
City
Leonia
State
N.J.
ZipCode
07605
Phone Number
1-877-765-4274
Web Address
www.solgar.com
Pharmacist Counseling Corner

Natural Soya Lecithin 300 mg by Solgar: Common Questions

Does Natural Soya Lecithin 300 mg by Solgar interact with any medications?
Yes. Based on its ingredients, Natural Soya Lecithin 300 mg has a known interaction with 102 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Natural Soya Lecithin 300 mg 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.
Does this product contain soy?
Yes — the product is made from soya lecithin, so it does contain soy. If you have a soy allergy, this isn't right for you.
Will this help my memory or prevent Alzheimer's disease?
The evidence for choline in age-related cognitive decline and Alzheimer's disease isn't strong enough to rate, so we can't say it will. Talk with your doctor about whether this makes sense for your situation.
Is this safe if I'm pregnant or breastfeeding?
Choline is rated likely safe during pregnancy and breastfeeding, but high-dose supplements should be used only as your doctor advises. Inositol has been studied in pregnancy but safety isn't fully established, so use it only under medical supervision if you're pregnant or nursing.
What side effects should I watch for?
At normal doses, both ingredients are well tolerated. The most common side effects are mild and digestive—diarrhea, gas, and nausea. Choline at very high doses (well above what's in this supplement) can cause fishy body odor and other stomach upset.
Can this help with PCOS or metabolic syndrome?
Inositol in this product is possibly effective for both polycystic ovary syndrome and metabolic syndrome, so it's worth discussing with your doctor if you have either condition.

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

Not sure if Natural Soya Lecithin 300 mg is safe with your meds?

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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.

Natural Soya Lecithin 300 mg label
Go deeper

The Full Monographs Behind Natural Soya Lecithin 300 mg’s Ingredients

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

Herb & supplement monograph

Lecithin

Lecithin is a natural fatty substance found in foods and made by the body that is widely used as a supplement and food emulsifier. Evidence supporting most of its health claims is limited, t...

Read the full Lecithin monograph → Herb & supplement monograph

Choline

Interacts with 16 drugs

Choline is an essential nutrient your body needs for liver function, brain health, and nerve signaling, and many people get enough from foods like eggs, meat, and fish. Supplements may help...

Read the full Choline monograph → Herb & supplement monograph

Inositol

Interacts with 86 drugs

Inositol is a sugar alcohol made naturally in the body and found in many foods, and it is sold as a supplement (often myo-inositol) mainly for PCOS, mood, and metabolic concerns. The stronge...

Read the full Inositol monograph →
Sources

Sources & How We Checked

Natural Soya Lecithin 300 mg'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 37 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.

Choline 14 references
  1. Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
  2. Cho E, Willett WC, Colditz GA, et al. Dietary choline and betaine and the risk of distal colorectal adenoma in women. J Natl Cancer Inst 2007;99:1224-31. PubMed
  3. Schmidt, C., Abicht, A., Krampfl, K., Voss, W., Stucka, R., Mildner, G., Petrova, S., Schara, U., Mortier, W., Bufler, J., Huebner, A., and Lochmuller, H. Congenital myasthenic syndrome due to a novel missense mutation in the gene encoding choline acetyl
  4. Tamminga, C., Smith, R. C., Chang, S., Haraszti, J. S., and Davis, J. M. Depression associated with oral choline. Lancet 10-23-1976;2(7991):905. PubMed
  5. Wood, J. L. and Allison, R. G. Effects of consumption of choline and lecithin on neurological and cardiovascular systems. Fed.Proc. 1982;41(14):3015-3021.
  6. Growdon, J. H. and Gelenberg, A. J. Choline and lecithin administration to patients with tardive dyskinesia. Trans.Am.Neurol.Assoc. 1978;103:95-99.
  7. Smith, C. M., Swash, M., Exton-Smith, A. N., Phillips, M. J., Overstall, P. W., Piper, M. E., and Bailey, M. R. Choline therapy in Alzheimer's disease. Lancet 8-5-1978;2(8084):318. PubMed
  8. Morrison, L. M. and W. F. Gonzales. Choline in coronary atherosclerosis. Amer.Heart J. 1950;39:729.
  9. Christie, J. G. Blackburn 1. M. Glen A. I. M. Zeisel S. Shering A. & Yates C. M. Effects of choline and lecithin on CSF choline levels and on cognitive functioning in patients with presenile dementia of the Alzheimer type. Nutrition and the brain 1979;5
  10. Sidhu N, Davies S, Nadarajah A, et al. Oral choline supplementation for postoperative pain. Br J Anaesth 2013;111(2):249-55. PubMed
  11. Wozniak JR, Fuglestad AJ, Eckerle JK, et al. Choline supplementation in children with fetal alcohol spectrum disorders has high feasibility and tolerability. Nutr Res. 2013;33(11):897-904. PubMed
  12. Wozniak JR, Fuglestad AJ, Eckerle JK, et al. Choline supplementation in children with fetal alcohol disorders: a randomized, double-blind, placebo-controlled trial. Am J Clin Nutr. 2015;102(5): 1113-25.
  13. Ross RG, Hunter SK, McCarthy L, et al. Perinatal choline effects on neonatal pathophysiology related to later schizophrenia risk. Am J Psychiatry. 2013;170(3):290-8. PubMed
  14. Food and Nutrition Board, Institute of Medicine. Choline. Dietary Reference Intakes: Thiamin, Riboflavin, Niacin, Vitamin B-6, Vitamin B-12, Pantothenic Acid, Biotin, and Choline. Washington D.C.: National Academy Press; 1998:390-422.

See these in context on the Choline monograph →

Inositol 14 references
  1. Palatnik A, Frolov K, Fux M, Benjamin J. Double-blind, controlled, crossover trial of inositol versus fluvoxamine for the treatment of panic disorder. J Clin Psychopharmacol 2001;21:335-9.. PubMed
  2. Allan SJ, Kavanagh GM, Herd RM, Savin JA. The effect of inositol supplements on the psoriasis of patients taking lithium: a randomized, placebo-controlled trial. Br J Dermatol 2004;150:966-9. PubMed
  3. Machado-Vieira R, Viale CI, Kapczinski F. Mania associated with an energy drink: the possible role of caffeine, taurine, and inositol. Can J Psychiatry 2001;46:454-5. PubMed
  4. Kamenov Z, Kolarov G, Gateva A, Carlomagno G, Genazzani AD. Ovulation induction with myo-inositol alone and in combination with clomiphene citrate in polycystic ovarian syndrome patients with insulin resistance. Gynecol Endocrinol 2015;31(2):131-5. PubMed
  5. Matarrelli B, Vitacolonna E, D'Angelo M, et al. Effect of dietary myo-inositol supplementation in pregnancy on the incidence of maternal gestational diabetes mellitus and fetal outcomes: a randomized controlled trial. J Matern Fetal Neonatal Med 2013;26(1 PubMed
  6. Mukai T, Kishi T, Matsuda Y, Iwata N. A meta-analysis of inositol for depression and anxiety disorders. Hum Psychopharmacol 2014;29(1):55-63. PubMed
  7. Farren M, Daly N, McKeating A, Kinsley B, Turner MJ, Daly S. The Prevention of Gestational Diabetes Mellitus With Antenatal Oral Inositol Supplementation: A Randomized Controlled Trial. Diabetes Care. 2017;40(6):759-63. PubMed
  8. Zheng X, Liu Z, Zhang Y, et al. Relationship Between Myo-Inositol Supplementary and Gestational Diabetes Mellitus: A Meta-Analysis. Medicine (Baltimore). 2015;94(42):e1604. PubMed
  9. Crawford TJ, Crowther CA, Alsweiler J, Brown J. Antenatal dietary supplementation with myo-inositol in women during pregnancy for preventing gestational diabetes. Cochrane Database Syst Rev. 2015;(12):CD011507. PubMed
  10. Maurizi AR, Menduni M, Del Toro R, et al. A pilot study of D-chiro-inositol plus folic acid in overweight patients with type 1 diabetes. Acta Diabetol. 2017;54(4):361-65. PubMed
  11. Leppink EW, Redden SA, Grant JE. A double-blind, placebo-controlled study of inositol in trichotillomania. Int Clin Psychopharmacol. 2017;32(2):107-14. PubMed
  12. Lam S, Mandrekar SJ, Gesthalter Y. A Randomized Phase IIb Trial of myo-Inositol in Smokers with Bronchial Dysplasia. Cancer Prev Res (Phila). 2016;9(12):906-14.
  13. Wozniak J, Faraone SV, Chan J, et al. A randomized clinical trial of high eicosapentaenoic acid omega-3 fatty acids and inositol as monotherapy and in combination in the treatment of pediatric bipolar spectrum disorders: a pilot study. J Clin Psychiatry. PubMed
  14. Vitale SG, Corrado F, Caruso S, et al. Myo-inositol supplementation to prevent gestational diabetes in overweight non-obese women: bioelectrical impedance analysis, metabolic aspects, obstetric and neonatal outcomes - a randomized and open-label, placebo-

See these in context on the Inositol monograph →

Lecithin 9 references
  1. Buchman AL, Dubin M, Jenden D, et al. Lecithin increases plasma free choline and decreases hepatic steatosis in long-term total parenteral nutrition patients. Gastroenterology 1992;102:1363-70.
  2. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
  3. Chatellier G, Lacomblez L. Tacrine (tetrahydroaminoacridine; THA) and lecithin in senile dementia of the Alzheimer type: a multicentre trial. Groupe Francais d'Etude de la Tetrahydroaminoacridine. BMJ 1990;300:495-9.
  4. Gelenberg AJ, Dorer DJ, Wojcik JD, et al. A crossover study of lecithin treatment of tardive dyskinesia. J Clin Psychiatry 1990;51:149-53.
  5. Little A, Levy R, Chuaqui-Kidd P, Hand D. A double-blind, placebo controlled trial of high-dose lecithin in Alzheimer's disease. J Neurol Neurosurg Psychiatry 1985;48:736-42. PubMed
  6. Palm M, Moneret-Vautrin DA, Kanny G, et al. Food allergy to egg and soy lecithins. Allergy 1999;54:1116-7. PubMed
  7. Drachman DA, Glosser G, Fleming P, et al. Memory decline in the aged: treatment with lecithin and physostigmine. Neurology 1982;32:944-50. PubMed
  8. Gelenberg, A. J., Doller-Wojcik, J. C., and Growdon, J. H. Choline and lecithin in the treatment of tardive dyskinesia: preliminary results from a pilot study. Am J Psychiatry 1979;136(6):772-776. PubMed
  9. Electronic Code of Federal Regulations. Title 21, Chapter 1, Subchapter B, Part 184: Direct food substances affirmed as Generally Recognized as Safe. Subpart B - listing of specific substances affirmed as GRAS. Sec. 184.1400 Lecithin. Available at: https:

See these in context on the Lecithin 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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