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Dietary supplement

IGF-1 Ingredients & Drug Interactions

by NOW Sports

IGF-1 label
See full label image
Lozenge Category: Non-nutrient/non-botanical
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 IGF-1 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

IGF-1 is a dietary supplement by NOW Sports with 1 active ingredient. Its ingredients are commonly taken for athletic performance and strength, energy and fatigue, joint health and arthritis.Based on those ingredients, 52 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are 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 by NOW Sports

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

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of IGF-1 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 1 of its 1 active ingredient.
  • “IGF-1” is listed as a grouped ingredient — the label gives one combined amount (0.08 mcg) without saying how much of each component you get.

This product contains one active ingredient: deer antler velvet extract, which comes from the soft, fuzzy covering on deer antlers. It also includes several inactive ingredients — fructose, sorbitol, microcrystalline cellulose, stearic acid, citric acid, natural flavors, and beet powder — that are there to make the lozenge and give it taste and texture.

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

This is a single-ingredient Deer Velvet product and its label doesn't state a use — see Deer Velvet's own graded uses on its monograph.

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

The evidence on deer antler velvet extract isn't established in the data we hold. Studies haven't rated it reliably for wound healing, heart health, blood pressure, bone strength, sexual desire, or aging.

That doesn't mean it doesn't work — it means the science isn't conclusive enough yet to say either way.

The evidence, ingredient by ingredient Deer Velvet

How safe is it?

Some data gaps
Safety Information · database check
Some gaps

Safety data exists for these ingredients, but with some important gaps.

Why this rating?
  • We hold adverse-effect (side-effect) data for 0 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Deer antler velvet extract appears generally well tolerated when used short-term, but how safe it is over the long run and the quality of different products aren't well studied. The safety data advises against use during pregnancy and while breastfeeding — there isn't enough information to know it's safe in those situations.

Side effects, ingredient by ingredient Deer Velvet

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?
  • 1 of the 1 matched ingredient can interact with medications — Deer Velvet.
  • The most serious interaction on file is rated Minor.
  • For scale: 52 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, check with your doctor or pharmacist if you take contraceptive drugs or estrogen medications. The deer antler velvet extract in it may theoretically interfere with how these drugs work.

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. Only minor medication interactions are documented, and some safety-information gaps remain.

This product is for people interested in deer antler velvet extract who want to try it short-term. If you take any hormonal medications — birth control, estrogen therapy, or anything else — talk with your doctor or pharmacist before starting, because the extract may interact with them.

It's important to check your specific medications before you begin.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated May 22, 2021.

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

At a glance

General information

Key facts about IGF-1, straight from the product label.

Brand NOW Sports
Barcode (UPC) 733739032027
Net contents 30 Lozenge(s)
Market status On market
Date entered into DSLD May 22, 2021
DSLD ID 245836
Product type Non-nutrient/non-botanical
Supplement form Lozenge
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Women (not pregnant or lactating), 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 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:
1 Lozenge(s)
Maximum serving Sizes:
1 Lozenge(s)
Servings per container
30
UPC/BARCODE
733739032027
IngredientAmount% DV
Deer Antler Velvet extract3.3 mg--
IGF-10.0825 mcg--

Other ingredients: Fructose, Sorbitol, Microcrystalline Cellulose, Stearic Acid, Citric Acid, Natural Flavors, Beet powder

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: Take 1 lozenge 1 to 2 times daily. Chew lozenge, or allow lozenge to dissolve in mouth completely and swallow.

Precautions

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.

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

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

Formulation

Natural color variation may occur in this product.

New Zealand Sourced

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

Storage

Store in a cool, dry place after opening

Seals/Symbols

GMP Quality Assured

Formula

Deer Antler Velvet Extract

Men's Health

Tasty Lozenge IGF-1 82.5 NG

FDA Statement of Identity

A Dietary Supplement

General Statements

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

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

See for yourself

IGF-1 by NOW Sports label

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

IGF-1 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 by NOW Sports

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Lozenge(s) Dosage formLozenge Servings per container30 Amounts shown are per serving.

IGF-1

0.0825 mcg per serving

Other (inactive) ingredients: Fructose, Sorbitol, Microcrystalline Cellulose, Stearic Acid, Citric Acid, Natural Flavors, Beet powder. These complete the product’s ingredient list but are not active constituents.

Interaction report

IGF-1 by NOW Sports Drug Interactions

Want to check YOUR meds against IGF-1?

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
52Drugs
52 Minor

Ingredients driving the most interactions

Deer Antler Velvet extract 52

Individual Drug Interactions

The ingredients in IGF-1 interact with 52 drugs. Click any drug to see the details.

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

Each ingredient & the kinds of drugs it affects

For each ingredient in IGF-1 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.

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, 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 by NOW Sports: Common Questions

Does IGF-1 by NOW Sports interact with any medications?
Yes. Based on its ingredients, IGF-1 has a known interaction with 52 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
IGF-1 contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is deer antler velvet extract safe while I'm pregnant?
No, the safety data advises against it during pregnancy because there isn't enough information to know it's safe. Talk with your doctor or pharmacist for personalized advice.
Is it safe to take while breastfeeding?
No, the safety data advises against it while breastfeeding because there isn't enough information to know it's safe. Check with your doctor or pharmacist before taking it.
Does this actually help with sexual desire or anti-aging?
The evidence isn't strong enough yet to say. The data we have rates both of those uses as having insufficient reliable evidence.
What's IGF-1 in the product name?
IGF-1 stands for insulin-like growth factor 1, which is what the product is named after. The active ingredient listed is deer antler velvet extract — that's what you're actually taking.
Are there any fillers or other junk in this lozenge?
There are inactive ingredients to make the lozenge work: fructose, sorbitol, cellulose, stearic acid, citric acid, natural flavors, and beet powder. Those are pretty standard for this type of product.

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

Not sure if IGF-1 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.

IGF-1 label
Go deeper

The Full Monographs Behind IGF-1’s Ingredients

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

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'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 2 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.

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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