Interactions on record — worth a quick check against your medications. Based on 2 of 6 ingredients. Check your meds →
Dietary supplement

GSC Ingredients & Drug Interactions

by Progressive Professional from Progressive Laboratories

GSC label
See full label image
Capsule Category: Other Combinations
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking GSC 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: Minor

GSC is a dietary supplement by Progressive Professional from Progressive Laboratories with 6 active ingredients. Its ingredients are commonly taken for treating or preventing b12 deficiency, pernicious anemia, low energy and fatigue.Based on those ingredients, 23 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Vitamin B12, raw Liver Concentrate. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against GSC by Progressive Professional from Progressive Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with GSC by Progressive Professional from Progressive Laboratories — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of GSC by Progressive Professional from Progressive Laboratories

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 6 of its 6 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains 6 active ingredients: vitamin B12 (a B vitamin your body needs to make red blood cells and keep your nerves working), raw adrenal concentrate, raw thymus concentrate, raw spleen concentrate, raw liver concentrate (which contains nutrients and compounds from animal organs), and raw stomach concentrate. The capsules also contain inactive ingredients — rice flour, gelatin, and vegetable lubricant — which help hold and deliver the actives.

Does it work?

Strong 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
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Vitamin B12 and liver nutritional support.
  • We looked for evidence on: Vitamin B12 deficiency, Fatigue, Peripheral neuropathy, General nutritional support, pernicious anemia, energy support — and 1 related terms.
  • The strongest evidence on file: Vitamin B12 is rated "Effective" for Vitamin B12 deficiency (Natural Medicines).
  • Also on file: Liver Extract is rated "Possibly Ineffective" for Chronic fatigue syndrome (CFS).
  • Also on file: Vitamin B12 is rated "Insufficient Reliable Evidence To Rate" for Chemotherapy-induced peripheral neuropathy, Fatigue, Peripheral neuropathy.

Vitamin B12 in this product is effective for treating B12 deficiency and Imerslund-Grasbeck disease (a rare inherited condition that affects B12 absorption). It's likely effective for cyanide poisoning and possibly effective for canker sores and postherpetic neuralgia (nerve pain after shingles).

The liver extract shows insufficient reliable evidence for hepatitis C and possibly ineffective for chronic fatigue syndrome based on the data we hold. We don't have established effectiveness ratings for the other organ concentrates in this formulation.

The evidence, ingredient by ingredient Vitamin B12 Liver Extract

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.

Vitamin B12 is generally very well tolerated — your body removes excess through your urine, so there's no established upper limit. It's considered safe and is actually needed during both pregnancy and breastfeeding at normal recommended amounts.

The most common side effect from B12 is injection site reactions when given as a shot; oral forms rarely cause allergic reactions like rash or itching. Liver extract carries more caution: it can deliver high levels of vitamin A and iron, and because it comes from raw animal liver, there's concern about source quality and possible contamination.

Liver products should be avoided in pregnancy unless your doctor specifically advises it, due to the risk of excess vitamin A to a developing baby. For breastfeeding, safety hasn't been well studied.

Talk with your doctor or pharmacist before taking this product, especially if you're pregnant or nursing.

Side effects, ingredient by ingredient Vitamin B12 Liver Extract

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 2 of the 2 matched ingredients can interact with medications — Vitamin B12, Liver Extract.
  • The most serious interaction on file is rated Minor.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 23 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 you start, double-check with your doctor or pharmacist if you take metformin (for diabetes), warfarin or other blood thinners (for clotting), or iron supplements or iron-containing medications — all have minor documented interactions with ingredients in this product. No interactions are documented for the other organ concentrates we could not check.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Only minor medication interactions are documented, and safety information is well characterized.

This product may be worth considering if you have low B12 and want organ-concentrate support, but you'll want to check it with your doctor or pharmacist first — particularly if you take metformin for diabetes, warfarin or other blood thinners, or iron supplements. Liver extract raises some sourcing and contamination concerns that are worth discussing.

Your healthcare provider can tell you whether it's right for you and your medications.

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

Assessment coverage: 2 of 6 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 11, 2022.

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 GSC, straight from the product label.

Brand Progressive Professional from Progressive Laboratories
Barcode (UPC) 351821004440
Net contents 90 Capsule(s)
Market status On market
Date entered into DSLD Apr 11, 2022
DSLD ID 261235
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), 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 GSC by Progressive Professional from Progressive Laboratories, 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:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
90
UPC/BARCODE
351821004440
IngredientAmount% DV
Vitamin B1224 mcg400%
raw Adrenal Concentrate15 mg--
raw Thymus Concentrate60 mg--
raw Spleen Concentrate15 mg--
raw Liver Concentrate15 mg--
raw Stomach Concentrate15 mg--

Other ingredients: Rice Flour, Gelatin, Vegetable Lubricant

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

Directions: One capsule three times daily, or more, as directed a health care professional.

General Statements

Sold only for dispensing by a licensed health care professional.

Precautions

Not to be used by pregnant or lactating women.

Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.

Keep out of reach of children.

Formulation

The glandular material in this product is produced by a special process that does not exceed physiological temperature (37 degrees C)

Guaranteed free of chemical pepticides and synthetic hormones. Contains no sugar, artificial color, preservatives, yeast, corn, wheat, or soy.

Progressive Laboratories manufactured this product in its 3rd party GMP-inspected facility. (Good Manufacturing Practices)

Glandular stress complex

Seals/Symbols

GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111

Brand IP Statement(s)

Progressive Professional from Progressive Laboratories

FDA Statement of Identity

Dietary Supplement

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

See for yourself

GSC by Progressive Professional from Progressive Laboratories label

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

GSC 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 GSC by Progressive Professional from Progressive Laboratories

These are the 6 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container90 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 B12

Interacts with
20 drugs
24 mcg per serving Form: Cyanocobalamin

Vitamin B12 (cobalamin) is an essential nutrient your body needs to make red blood cells, keep nerves healthy, and support DNA. Supplements are very h...

Vitamin B12 monograph & interactions

Raw Adrenal Concentrate

15 mg per serving

Raw Thymus Concentrate

60 mg per serving

Raw Spleen Concentrate

15 mg per serving

Raw Liver Concentrate

Interacts with
3 drugs
15 mg per serving

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once...

Raw Liver Concentrate monograph & interactions

Raw Stomach Concentrate

15 mg per serving

Other (inactive) ingredients: Rice Flour, Gelatin, Vegetable Lubricant. These complete the product’s ingredient list but are not active constituents.

Interaction report

GSC by Progressive Professional from Progressive Laboratories Drug Interactions

Want to check YOUR meds against GSC?

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
23Drugs
23 Minor

Ingredients driving the most interactions

Vitamin B12 20
raw Liver Concentrate 3

Individual Drug Interactions

The ingredients in GSC interact with 23 drugs. Click any drug to see the details.

2 of the 6 ingredients in GSC interact with drugs. Each result below shows which ingredient is responsible. Vitamin B12 raw Liver Concentrate

Each ingredient & the kinds of drugs it affects

For each ingredient in GSC 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 B121 drug type · 20 drugs

Metformin (Glucophage)

Metformin, a common medication used to manage type 2 diabetes, has been associated with lower vitamin B12 levels in some individuals. Prolonged use of metformin can interfere with the absorption of B12 in the digestive system, potentially leading to a deficiency in this essential vitamin.

Likelihood Possible Evidence A
Vitamin B12 full monograph & interactions

raw Liver Concentrate2 drug types · 3 drugs

Iron

Liver extract can contain heme iron. Taking liver extract with iron-containing medications or supplements may increase total iron intake and could increase the risk of gastrointestinal adverse effects or excessive iron accumulation. The risk is greater with high doses, prolonged use, or in individuals with hemochromatosis or another iron-overload disorder. Review the iron content of the liver extract and the total elemental iron dose. Avoid unnecessary duplicate iron supplementation and consider monitoring ferritin and transferrin saturation when clinically appropriate.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Liver extract products may contain small and variable amounts of vitamin K. Theoretically, starting, stopping, or substantially changing the amount of liver extract used could reduce the anticoagulant effect of warfarin and lower the INR. However, this interaction has not been directly studied or reported in humans, and the vitamin K content of liver extract products is generally not standardized. Consider monitoring the INR after a meaningful change in liver extract use.

Likelihood Possible Evidence C
raw Liver Concentrate full monograph & interactions
The maker

Brand information

Manufacturer and brand details for GSC, from the product label.

Progressive Professional from Progressive Laboratories

See all Progressive Professional from Progressive Laboratories products
Name
Progressive Laboratories, Inc.
City
Irving
State
Texas
ZipCode
75038
Phone Number
1-800-527-9512
Pharmacist Counseling Corner

GSC by Progressive Professional from Progressive Laboratories: Common Questions

Does GSC by Progressive Professional from Progressive Laboratories interact with any medications?
Yes. Based on its ingredients, GSC has a known interaction with 23 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
GSC contains 6 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?
Vitamin B12 in this product is considered safe and is actually needed during both pregnancy and breastfeeding at normal recommended amounts. However, the liver extract in it can deliver very high vitamin A, which may harm a developing baby, so avoid it in pregnancy unless your doctor advises otherwise. For breastfeeding, safety of the liver extract hasn't been well studied. Talk with your doctor or pharmacist before taking this product while pregnant or nursing.
What is B12 actually used for?
Vitamin B12 helps your body make red blood cells and keeps your nervous system working properly. This product is effective for treating B12 deficiency and a rare inherited condition called Imerslund-Grasbeck disease, and it's likely effective for cyanide poisoning. It's also possibly helpful for canker sores and nerve pain after shingles.
Does this product have any side effects?
B12 is very well tolerated and generally doesn't cause side effects when taken by mouth. Allergic reactions like rash or itching are rare. The liver extract has not been thoroughly studied for side effects, though no serious reactions have been reported. However, because liver comes from raw animal sources, there's some concern about contamination — it's worth discussing with your doctor or pharmacist.
What are these organ concentrates supposed to do?
This product contains raw concentrates from adrenal, thymus, spleen, liver, and stomach tissues — traditional supplement ingredients believed to support those organ systems. However, we don't have established effectiveness data in our records for most of these concentrates, so talk with your doctor about what to expect.
Is B12 safe if I take it long-term?
Yes, vitamin B12 is very safe long-term because your body removes excess through your urine — there's no established upper limit. However, if you take metformin for diabetes, be aware that metformin can lower your B12 levels over time, so your doctor may want to monitor you.
Will this interact with my blood thinner?
If you take warfarin (Coumadin) or another blood thinner, the liver extract in this product contains small amounts of vitamin K, which could theoretically reduce your blood thinner's effectiveness — though this interaction hasn't been directly studied in humans. Check with your doctor or pharmacist before starting this product; they may want to monitor your blood clotting levels.

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.

GSC label
Go deeper

The Full Monographs Behind GSC’s Ingredients

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

Herb & supplement monograph

Vitamin B12

Interacts with 20 drugs

Vitamin B12 (cobalamin) is an essential nutrient your body needs to make red blood cells, keep nerves healthy, and support DNA. Supplements are very helpful for people who are deficient — su...

Read the full Vitamin B12 monograph → Herb & supplement monograph

Liver Extract

Interacts with 3 drugs

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once used to treat certain anemias before pu...

Read the full Liver Extract monograph →
Sources

Sources & How We Checked

GSC'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 34 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 B12 30 references
  1. 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
  2. Hartman TJ, Woodson K, Stolzenberg-Solomon R, et al. Association of the B-vitamins pyridoxal 5'-phosphate (B6), B12, and folate with lung cancer risk in older men. Am J Epidemiol 2001;153:688-94.. DOI
  3. Jansen T, Romiti R, Kreuter A, Altmeyer P. Rosacea fulminans triggered by high-dose vitamins B6 and B12. J Eur Acad Dermatol Venereol 2001;15:484-5..
  4. Lange H, Suryapranata H, De Luca G, et al. Folate therapy and in-stent restenosis after coronary stenting. N Engl J Med 2004;350:2673-81. PubMed
  5. Collin, S. M., Metcalfe, C., Refsum, H., Lewis, S. J., Zuccolo, L., Smith, G. D., Chen, L., Harris, R., Davis, M., Marsden, G., Johnston, C., Lane, J. A., Ebbing, M., Bonaa, K. H., Nygard, O., Ueland, P. M., Grau, M. V., Baron, J. A., Donovan, J. L., Nea
  6. Geissbuhler, P., Mermillod, B., and Rapin, C. H. Elevated serum vitamin B12 levels associated with CRP as a predictive factor of mortality in palliative care cancer patients: a prospective study over five years. J.Pain Symptom.Manage. 2000;20(2):93-103. PubMed
  7. Salles, N., Herrmann, F., Sakbani, K., Rapin, C. H., and Sieber, C. High vitamin B12 level: a strong predictor of mortality in elderly inpatients. J Am Geriatr.Soc 2005;53(5):917-918.
  8. Looker, H. C., Fagot-Campagna, A., Gunter, E. W., Pfeiffer, C. M., Sievers, M. L., Bennett, P. H., Nelson, R. G., Hanson, R. L., and Knowler, W. C. Homocysteine and vitamin B(12) concentrations and mortality rates in type 2 diabetes. Diabetes Metab Res R
  9. Uhl, W., Nolting, A., Golor, G., Rost, K. L., and Kovar, A. Safety of hydroxocobalamin in healthy volunteers in a randomized, placebo-controlled study. Clin Toxicol (Phila) 2006;44 Suppl 1:17-28. PubMed
  10. Borron, S. W., Baud, F. J., Barriot, P., Imbert, M., and Bismuth, C. Prospective study of hydroxocobalamin for acute cyanide poisoning in smoke inhalation. Ann Emerg.Med 2007;49(6):794-801, 801. PubMed
  11. Borron, S. W., Baud, F. J., Megarbane, B., and Bismuth, C. Hydroxocobalamin for severe acute cyanide poisoning by ingestion or inhalation. Am J Emerg.Med 2007;25(5):551-558. PubMed
  12. Lewis, J. G. Gout, Steatorrhoea, and Megaloblastic Anaemia. Ann Rheum.Dis 1962;21(3):284-286. PubMed
  13. Tal, S., Shavit, Y., Stern, F., and Malnick, S. Association between vitamin B12 levels and mortality in hospitalized older adults. J Am Geriatr.Soc 2010;58(3):523-526. PubMed
  14. Baztan, J. J., Gavidia, J. J., Gomez-Pavon, J., Esteve, A., and Ruiperez, I. High vitamin B12 levels and in-hospital mortality. J Am Geriatr.Soc 2010;58(11):2237-2238. PubMed
  15. Omboni, E., Checchini, M., and Longoni, F. [Hypopotassemia and megaloblastic anemia. Presentation of a case]. Minerva Med 8-31-1987;78(16):1255-1257.
  16. Aalfs As, Scholvinck LH, Horvath B. Acneiform eruption in a 5-year old due to vitamin B12 supplementation. Eur J Dermatol 2013;23(5):726-7. PubMed
  17. Balta I, Ozuguz P. Vitamin B12-induced acneiform eruption. Cutan Ocul Toxicol 2014;33(2):94-5. PubMed
  18. Carman KB, Belgemen T, Yis U. Involuntary movements misdiagnosed as seizure during vitamin B12 treatment. Pediatr Emerg Care 2013;29(11):1223-4. PubMed
  19. Djuric V, Bogic M, Popadic AP, et al. Anaphylactic reaction to hydroxycobalamin with tolerance to cyanocobalamin. Ann Allergy Asthma Immunol 2012;108(3):207-8. PubMed
  20. Kartel O, Gulec M, Demirel F, et al. Vitamin B12 allergy and successful desensitization with cyanocobalamin: A case report. Allergol Immunopath (Madr) 2012;40(5):324-5.
  21. Patiroglu T, Unal E, Yildirim S. Infantile tremor syndrome associated with cobalamin therapy: A case report. Clin Neurol Neurosurg 2013;115(9):1903-5. PubMed
  22. Schulte S, Barkema LW, Kardaun SH. Long-lasting atypical acneiform eruption with prominent comedones induced by hydroxocobalamin (vitamin B12). J Dtsch Dermatol Ges 2014;12(6):502-3.
  23. Zanus C, Alberini E, Costa P, et al. Involuntary movements after correction of vitamin B12 deficiency: A video-case report. Epileptic Disord 2012;14(2):174-80. PubMed
  24. Fanidi A, Carreras-Torres R, Larose TL, et al. Is high vitamin B12 status a cause of lung cancer? Int J Cancer. 2019 Sep 15;145(6):1499-1503. PubMed
  25. Fujita Y, Mizukami T, Maya Y, et al. Vitamin B12 allergy manifesting as lymphomatoid contact dermatitis. Eur J Dermatol. 2020;30(3):304-305. PubMed
  26. Dépret F, Hoffmann C, Daoud L, et al. Association between hydroxocobalamin administration and acute kidney injury after smoke inhalation: a multicenter retrospective study. Crit Care. 2019;23(1):421. PubMed
  27. Khairan P, Sobue T, Eshak ES, et al. Association of dietary intakes of vitamin B12, vitamin B6, folate, and methionine with the risk of esophageal cancer: the Japan Public Health Center-based (JPHC) prospective study. BMC Cancer 2021;21(1):982. PubMed
  28. Evans J, Pandya A, Ding Y, Qunibi WY. Hydroxocobalamin-Induced Oxalate Nephropathy in a Patient With Smoke Inhalation. Kidney Int Rep 2021;6(8):2228-2231. PubMed
  29. Lacombe V, Chabrun F, Lacout C, et al. Persistent elevation of plasma vitamin B12 is strongly associated with solid cancer. Sci Rep 2021;11(1):13361. PubMed
  30. Pegalajar-García MD, Cebolla-Verdugo M, Prados-Carmona Á, Llamas-Segura C, Navarro-Triviño FJ. Systemic allergic dermatitis to cobalt present in cyanocobalamin supplementation. Contact Dermatitis 2023;89(3):203-205. PubMed

See these in context on the Vitamin B12 monograph →

Liver Extract 4 references
  1. Lewis CJ. Letter to reiterate certain public health and safety concerns to firms manufacturing or importing dietary supplements that contain specific bovine tissues. FDA. Available at: www.cfsan.fda.gov/~dms/dspltr05.html.
  2. Kaslow JE, Rucker L, Onishi R. Liver extract-folic acid-cyanocobalamin vs placebo for chronic fatigue syndrome. Arch Intern Med 1989;149:2501-3. DOI
  3. Ebinuma, H., Saito, H., Tada, S., Masuda, T., Kamiya, T., Nishida, J., Yoshioka, M., and Ishii, H. Additive therapeutic effects of the liver extract preparation mixture adelavin-9 on interferon-beta treatment for chronic hepatitis C. Hepatogastroenterolog
  4. Saito, H., Ebinuma, H., Tada, S., Tsunematsu, S., Atsukawa, K., Masuda, T., Tsuchiya, M., and Ishii, H. Enhancing effect of the liver extract and flavin adenin dinucleotide mixture on anti-viral efficacy of interferon in patients with chronic hepatitis C. PubMed

See these in context on the Liver Extract 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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