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Dietary supplement

GH Stim Ingredients & Drug Interactions

by HoltraCeuticals

GH Stim label
See full label image
Capsule 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 GH Stim 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

GH Stim is a dietary supplement by HoltraCeuticals with 2 active ingredients. Its ingredients are commonly taken for high cholesterol, menopausal symptoms, athletic performance and muscle building.Based on those ingredients, 822 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Resveratrol. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against GH Stim by HoltraCeuticals

Ask about any prescription or over-the-counter medication and we check it for interactions with GH Stim by HoltraCeuticals — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of GH Stim by HoltraCeuticals

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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

GH Stim contains 2 active ingredients: gamma oryzanol and resveratrol. Gamma oryzanol is a plant extract studied mainly for cholesterol and lipid support, while resveratrol is a polyphenol from grapes and other plants.

The capsule itself is made from microcrystalline cellulose (a plant fiber) and a vegetable capsule material.

Does it work?

Not established
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 established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use.

Why this rating?
  • The label markets this product for: Supports growth hormone production.
  • We looked for evidence on: Athletic performance, Muscle strength, Growth hormone secretion, Lean body mass, Physical performance.
  • The closest evidence on file: Gamma-oryzanol is rated "Insufficient Reliable Evidence To Rate" for Athletic performance (Natural Medicines).
  • Also on file: Gamma-oryzanol is rated "Insufficient Reliable Evidence To Rate" for Muscle strength.

Gamma oryzanol is possibly effective for dyslipidemia (high cholesterol and triglycerides), but the evidence for athletic performance and eczema is too limited to rate. Resveratrol is possibly effective for obesity and allergic rhinitis (hay fever), though it appears possibly ineffective for cardiovascular disease and high cholesterol.

The data we hold don't establish strong evidence for either ingredient beyond those ratings.

The evidence, ingredient by ingredient Gamma-oryzanol Resveratrol

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.

Both ingredients are generally well tolerated at typical doses. Gamma oryzanol's long-term safety isn't well established.

Resveratrol at higher doses may cause diarrhea, loose stools, and digestive discomfort; occasional headache, fatigue, and skin rash have been reported in trials. The safety data advises against gamma oryzanol during pregnancy and breastfeeding.

For resveratrol, there isn't enough safety information for concentrated supplements in pregnancy, so avoid it; the same applies to breastfeeding.

Side effects, ingredient by ingredient Gamma-oryzanol Resveratrol

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?
  • 1 of the 2 matched ingredients can interact with medications — Resveratrol.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 823 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 GH Stim, double-check any blood thinners or antiplatelet drugs you're on (like warfarin, aspirin, or clopidogrel) — resveratrol may increase bleeding risk. Also check medications metabolized by CYP2C19, CYP1A2, CYP2E1, and CYP3A4 liver enzymes, as resveratrol may raise their levels.

Use the medication checker on this page to verify your exact prescriptions.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

GH Stim may help with cholesterol levels or hay fever symptoms, but resveratrol's interactions with blood thinners and certain metabolized drugs are real. If you take any prescription medication—especially anticoagulants or antiplatelet drugs—check it against the medication tool before you start.

Talk to your pharmacist about whether this product fits your regimen.

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, 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 GH Stim, straight from the product label.

Brand HoltraCeuticals
Net contents 120 Capsule(s)
Market status On market
Date entered into DSLD Aug 23, 2022
DSLD ID 271518
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 GH Stim by HoltraCeuticals, 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
120
IngredientAmount% DV
Gamma Oryzanol150 mg--
Resveratrol8 mg--

Other ingredients: Microcrystalline Cellulose, Vegetable capsule

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 use: Take 1 capsule daily with meals. Can be taken throughout the day or as directed by a health professional.

Storage

Store in a cool, dry place with the lid tightly closed.

Precautions

Keep out of reach of children.

Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication or have a medical condition.

FDA Disclaimer Statement

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

General Statements

To re-order, visit: HoltraCeuticals.com

FDA Statement of Identity

Dietary Supplement

Formulation

Supports growth hormone production

No artificial colors, artificial flavors, milk or milk derivatives, or sodium added.

Brand IP Statement(s)

Holtorf Medical Group Centers for hormone imbalance, hypothyroidism and fatigue

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

See for yourself

GH Stim by HoltraCeuticals label

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

GH Stim 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 GH Stim by HoltraCeuticals

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

Serving size1 Capsule(s) Dosage formCapsule Servings per container120 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.

Gamma Oryzanol

No known
interactions
150 mg per serving

Gamma-oryzanol is a mix of plant compounds taken from rice bran oil, used mainly for cholesterol, menopause symptoms, and as a sports supplement. The...

Gamma Oryzanol monograph & interactions

Resveratrol

Interacts with
822 drugs
8 mg per serving Form: Polygonum cuspidatum root extract

Resveratrol is a plant compound found in red grapes, berries, and peanuts that is popular for heart health, anti-aging, and antioxidant support. While...

Resveratrol monograph & interactions

Other (inactive) ingredients: Microcrystalline Cellulose, Vegetable capsule. These complete the product’s ingredient list but are not active constituents.

Interaction report

GH Stim by HoltraCeuticals Drug Interactions

Want to check YOUR meds against GH Stim?

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
822Drugs
822 Moderate

Ingredients driving the most interactions

Resveratrol 822

Individual Drug Interactions

The ingredients in GH Stim interact with 822 drugs. Click any drug to see the details.

1 of the 2 ingredients in GH Stim interact with drugs. Each result below shows which ingredient is responsible. Resveratrol

Each ingredient & the kinds of drugs it affects

For each ingredient in GH Stim 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.

Resveratrol5 drug types · 822 drugs

Anticoagulant/Antiplatelet Drugs

Resveratrol may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Resveratrol seems to have antiplatelet effects.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, resveratrol might increase levels of drugs metabolized by CYP1A2.
In vitro research shows that resveratrol can inhibit CYP1A2 enzymes. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, resveratrol might increase levels of drugs metabolized by CYP2C19.
In vitro research shows that resveratrol can inhibit CYP2C19 enzymes. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2E1 (Cyp2E1) Substrates

Resveratrol might increase levels of drugs metabolized by CYP2E1.
In vitro research suggests that resveratrol inhibits CYP2E1 isoenzyme. Also, a pharmacokinetic study shows that taking resveratrol 500 mg daily for 10 days prior to taking a single dose of chlorzoxazone 250 mg increases the maximum concentration of chlorzoxazone by about 54%, the area under the curve of chlorzoxazone by about 72%, and the half-life of chlorzoxazone by about 35%. Chlorzoxazone is used as a probe drug for CYP2E1.

Likelihood Probable Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, resveratrol might increase levels of drugs metabolized by CYP3A4.
In vitro research shows that resveratrol can inhibit the CYP3A4 enzyme. However, clinical research shows that taking resveratrol 3000 mg daily for 8 weeks does not necessitate dose adjustments to medications metabolized by CYP3A4.

Likelihood Possible Evidence D
Resveratrol full monograph & interactions
The maker

Brand information

Manufacturer and brand details for GH Stim, from the product label.

HoltraCeuticals

See all HoltraCeuticals products
Name
Kent Holtorf, M.D. and the Holtorf Medical Group
City
El Segundo
State
CA
Phone Number
310-375-2705
Web Address
HoltraCeuticals.com
Pharmacist Counseling Corner

GH Stim by HoltraCeuticals: Common Questions

Does GH Stim by HoltraCeuticals interact with any medications?
Yes. Based on its ingredients, GH Stim has a known interaction with 822 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
GH Stim 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?
There isn't enough safety data for gamma oryzanol during pregnancy or breastfeeding — the data advises against both. Resveratrol in supplement form also lacks enough safety information for pregnancy and breastfeeding. Talk with your doctor or pharmacist about whether this product is right for you during these times.
What's gamma oryzanol?
Gamma oryzanol is a plant compound studied mainly for its effects on cholesterol and triglycerides. It's possibly effective for dyslipidemia, but we don't have strong evidence for its other claimed uses yet.
What's resveratrol?
Resveratrol is a polyphenol found in grapes, red wine, and other plants. It's possibly effective for obesity and hay fever, though it appears ineffective for heart disease and high cholesterol.
Could resveratrol upset my stomach?
Yes — at higher doses, resveratrol commonly causes diarrhea, loose stools, and general digestive discomfort. Food sources are well tolerated; the issue is more common with supplement doses.
Is this product supposed to boost growth hormone?
The product is called GH Stim, but we hold no data on its effect on growth hormone levels. Our facts cover only the safety and effectiveness of its two ingredients — gamma oryzanol and resveratrol — for the conditions listed.

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

Not sure if GH Stim 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.

GH Stim label
Go deeper

The Full Monographs Behind GH Stim’s Ingredients

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

Herb & supplement monograph

Gamma-oryzanol

Gamma-oryzanol is a mix of plant compounds taken from rice bran oil, used mainly for cholesterol, menopause symptoms, and as a sports supplement. The evidence is limited and mostly comes fro...

Read the full Gamma-oryzanol monograph → Herb & supplement monograph

Resveratrol

Interacts with 822 drugs

Resveratrol is a plant compound found in red grapes, berries, and peanuts that is popular for heart health, anti-aging, and antioxidant support. While lab and animal studies are promising, s...

Read the full Resveratrol monograph →
Sources

Sources & How We Checked

GH Stim'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 24 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.

Resveratrol 24 references
  1. Soleas GJ, Diamandis EP, Goldberg DM. Resveratrol: a molecule whose time has come? And gone? Clin Biochem 1997;30:91-113.
  2. Pace-Asciak CR, Rounova O, Hahn SE, et al. Wines and grape juices as modulators of platelet aggregation in healthy human subjects. Clin Chim Acta 1996;246:163-82. PubMed
  3. Bertelli AA, Giovannini L, Bernini W, et al. Antiplatelet activity of cis-resveratrol. Drugs Exp Clin Res 1996;22:61-3.
  4. Pace-Asciak CR, Hahn S, Diamandis EP, et al. The red wine phenolics trans-resveratrol and quercetin block human platelet aggregation and eicosanoid synthesis: implications for protection against coronary heart disease. Clin Chim Acta 1995;235:207-19.
  5. Bertelli A, Bertelli AA, Gozzini A, Giovannini L. Plasma and tissue resveratrol concentrations and pharmacological activity. Drugs Exp Clin Res 1998;24:133-8.
  6. Bertelli AA, Giovannini L, Giannessi D, et al. Antiplatelet activity of synthetic and natural resveratrol in red wine. Int J Tissue React 1995;17:1-3.
  7. Piver B, Berthou F, Dreano Y, Lucas D. Inhibition of CYP3A, CYP1A and CYP2E1 activities by resveratrol and other non volatile red wine components. Toxicol Lett 2001;125:83-91. PubMed
  8. Chang, T. K., Chen, J., and Lee, W. B. Differential inhibition and inactivation of human CYP1 enzymes by trans-resveratrol: evidence for mechanism-based inactivation of CYP1A2. J.Pharmacol.Exp.Ther. 2001;299(3):874-882.
  9. Dobrydneva, Y., Williams, R. L., and Blackmore, P. F. trans-Resveratrol inhibits calcium influx in thrombin-stimulated human platelets. Br.J.Pharmacol. 1999;128(1):149-157.
  10. Kirk, R. I., Deitch, J. A., Wu, J. M., and Lerea, K. M. Resveratrol decreases early signaling events in washed platelets but has little effect on platalet in whole food. Blood Cells Mol.Dis. 2000;26(2):144-150.
  11. Zbikowska, H. M. and Olas, B. Antioxidants with carcinostatic activity (resveratrol, vitamin E and selenium) in modulation of blood platelet adhesion. J Physiol Pharmacol. 2000;51(3):513-520.
  12. Olas, B., Wachowicz, B., Saluk-Juszczak, J., and Zielinski, T. Effect of resveratrol, a natural polyphenolic compound, on platelet activation induced by endotoxin or thrombin. Thromb.Res 8-15-2002;107(3-4):141-145. PubMed
  13. Yu, C., Shin, Y. G., Kosmeder, J. W., Pezzuto, J. M., and van Breemen, R. B. Liquid chromatography/tandem mass spectrometric determination of inhibition of human cytochrome P450 isozymes by resveratrol and resveratrol-3-sulfate. Rapid Commun.Mass Spectro PubMed
  14. Ma, Z. H. and Ma, Q. Y. Resveratrol: a medical drug for acute pancreatitis. World J Gastroenterol. 6-7-2005;11(21):3171-3174. PubMed
  15. la, Porte C., Voduc, N., Zhang, G., Seguin, I., Tardiff, D., Singhal, N., and Cameron, D. W. Steady-State pharmacokinetics and tolerability of trans-resveratrol 2000 mg twice daily with food, quercetin and alcohol (ethanol) in healthy human subjects. Cli PubMed
  16. Brown, V. A., Patel, K. R., Viskaduraki, M., Crowell, J. A., Perloff, M., Booth, T. D., Vasilinin, G., Sen, A., Schinas, A. M., Piccirilli, G., Brown, K., Steward, W. P., Gescher, A. J., and Brenner, D. E. Repeat dose study of the cancer chemopreventive
  17. Pendurthi, U. R., Williams, J. T., and Rao, L. V. Resveratrol, a polyphenolic compound found in wine, inhibits tissue factor expression in vascular cells : A possible mechanism for the cardiovascular benefits associated with moderate consumption of wine. PubMed
  18. Chachay VS, Macdonald GA, Martin JH, Whitehead JP, O'Moore-Sullivan TM, Lee P, Franklin M, Klein K, Taylor PJ, Ferguson M, Coombes JS, Thomas GP, Cowin GJ, Kirkpatrick CM, Prins JB, Hickman IJ. Resveratrol does not benefit patients with nonalcoholic fatty
  19. Bedada SK, Neerati P. Resveratrol Pretreatment Affects CYP2E1 Activity of Chlorzoxazone in Healthy Human Volunteers. Phytother Res. 2016;30(3):463-8. PubMed
  20. Lin CT, Sun XY, Lin AX. Supplementation with high-dose trans-resveratrol improves ultrafiltration in peritoneal dialysis patients: a prospective, randomized, double-blind study. Ren Fail. 2016;38(2):214-21. PubMed
  21. Li Q, Yang G, Xu H, Tang S, Lee WY. Effects of resveratrol supplementation on bone quality: a systematic review and meta-analysis of randomized controlled trials. BMC Complement Med Ther 2021;21(1):214. PubMed
  22. McCreary MR, Schnell PM, Rhoda DA. Randomized double-blind placebo-controlled proof-of-concept trial of resveratrol for outpatient treatment of mild coronavirus disease (COVID-19). Sci Rep 2022;12(1):10978. PubMed
  23. Abdelhaleem IA, Brakat AM, Adayel HM, Asla MM, Rizk MA, Aboalfetoh AY. The effects of resveratrol on glycemic control and cardiometabolic parameters in patients with T2DM: A systematic review and meta-analysis. Med Clin (Barc) 2022;158(12):576-585. PubMed
  24. Badaoui A. Allergic contact dermatitis to resveratrol and Scutellaria baicalensis root extract in a cosmetic product. Contact Dermatitis 2022.

See these in context on the Resveratrol 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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