Notebook entry

How Hair Supplements Are (Not) Regulated in the US

No FDA approval before sale, a standard disclaimer, advertising rules from the FTC and certification marks that test purity, not results. What each layer does, and what it leaves to you.

Sources read Sep 22, 2026Not reviewed by a clinician

In the US, hair supplements do not need FDA approval before they go on sale. Under the Dietary Supplement Health and Education Act of 1994, the FDA says it does not have the authority to approve dietary supplements before they are marketed; the company selling one is responsible for its safety and its label, and the FDA acts afterwards when it finds a problem. Advertising claims fall to the Federal Trade Commission.

This entry is information only, written from published sources on 22 September 2026 and not reviewed by a clinician or a lawyer.

What the FDA does and does not do

The direct answer: the FDA sets the rules supplements must follow and can act against unsafe or mislabelled products, but it does not review them before sale.

The FDA's questions-and-answers page on dietary supplements, current as of 27 August 2026, says three things that matter here:

Under DSHEA, the FDA does not have the authority to approve dietary supplements before they are marketed.
A firm is responsible for making sure the supplements it makes or sells are not adulterated, misbranded or otherwise unlawful.
A dietary supplement is a product taken by mouth that contains a dietary ingredient intended to supplement the diet.

That is the opposite of how medicines work. Finasteride and topical minoxidil went through FDA review before they could be sold for hair loss; a hair capsule did not have to.

The disclaimer on every label

The direct answer: when a supplement claims to affect the body's structure or function, such as "supports healthy hair growth", it must carry a standard FDA disclaimer.

The wording, as the FDA gives it, is: "This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease." You will find it on Nutrafol's and Viviscal's pages. It is not a warning that something is wrong; it is a reminder that nobody at the FDA checked the claim.

What "clinically tested" means

The direct answer: someone ran a study, usually the company; it does not mean a regulator reviewed the result or that the study was independent.

The FTC's Health Products Compliance Guidance, issued in December 2022, says randomised, controlled human clinical trials are the most reliable form of evidence and are generally what experts would require for health-benefit claims. It also says replication in a second study by independent researchers reduces the chance that a single trial's result reflects undetected bias. That is the test to apply to any hair supplement: how many trials, how large, and did anyone other than the seller run one? Our entry on whether Nutrafol works applies it to one brand.

Certification marks

The direct answer: marks such as NSF Certified for Sport speak to quality and purity, not to whether a product works.

Nutrafol's men's page says the product is NSF Certified for Sport. NSF's own site describes that programme as verifying quality, purity and safety and testing for more than 280 banned substances; the page we read said nothing about testing whether a product works. That is useful information for an athlete worried about contamination. It is not evidence about hair.

Marketing phrases, decoded

"#1 dermatologist-recommended" is the brand's own description; the page we read did not show the survey behind it.
"Drug-free" means the product is not a medicine; it does not mean it cannot interact with medicines. Nutrafol itself asks people on blood thinners to see a physician first.
"Results in 3-6 months" describes what the company says its studies showed, not a promise for you.
"Before and after" photos show two moments, not what would have happened without the product. We do not publish them.

Minoxidil gummies are a different category

The direct answer: a gummy that contains minoxidil is a prescription medicine, not a supplement, whatever vitamins are added.

Oral minoxidil tablets are labelled in the US for severe high blood pressure, and some prescribers use them off-label for hair loss; that is a clinical decision for a prescriber, with dosing and monitoring we do not cover. Topical minoxidil is the over-the-counter medicine approved for pattern hair loss. Neither is regulated as a supplement.

What this means when you shop

Treat supplement claims as the seller's claims until a trial you can read says otherwise.
Look for how many people were studied, for how long, against placebo, and who paid.
Read the label, not the product page, and show it to your doctor or pharmacist.
Watch for doubled-up nutrients across products; see Nutrafol ingredients, one by one.

A doctor visit, a pharmacist's advice and a public fact sheet cost this site nothing to recommend and earn it nothing. For how one popular brand measures up against these tests, read our Nutrafol review and published score.

Reporting a problem

The direct answer: in the US, anyone can report a bad reaction to a dietary supplement to the FDA online, and it is worth doing even if you are not sure the product caused it.

The FDA's page on reporting supplement problems, current as of 13 March 2025, directs consumers to its Safety Reporting Portal, where a private citizen can file a voluntary report, with or without an account. Reports are one of the few ways the agency learns about problems with products it did not review before sale. If you are unwell, see a doctor first; the report can come afterwards, and your doctor can file one too.

A label-reading checklist

The direct answer: the Supplement Facts panel tells you more than the front of the pack, and it is what your doctor or pharmacist needs to see.

Serving size. Every amount on the panel is per serving, and a serving may be several capsules.
Percent daily value. A figure far above 100% is not automatically dangerous, but it is a reason to check what else you take.
Proprietary blends. A named blend can list its ingredients without the amount of each, which makes it harder to compare with the studies behind any one ingredient.
Allergens. Marine collagen, shellfish extracts and other animal-derived ingredients appear in several hair supplements.
The FDA statement. Its presence tells you the claims were not evaluated; it is not a quality mark.

Regulation questions

Is Nutrafol FDA approved?

No. It is a dietary supplement, and the FDA does not approve supplements before they are sold. Its pages carry the standard statement that its claims have not been evaluated by the FDA.

Who checks that a supplement contains what the label says?

The company is responsible under federal law, and the FDA can act when it finds a problem. Independent certification programmes, such as NSF's, test some products for quality and purity; they do not test whether the product works.

Can supplement companies say their product regrows hair?

Supplements may make structure or function claims with the FDA disclaimer, but they may not claim to treat or cure a disease. The FTC also expects health claims to be backed by competent and reliable scientific evidence.

Are hair supplements tested for safety before sale?

Not by the FDA. The seller is responsible for safety, and problems surface after sale through reports and case studies, such as the 2025 case report of high vitamin D linked to a hair supplement.

Are minoxidil gummies a supplement?

No. Minoxidil is a medicine, not a dietary ingredient, so a gummy containing it is a medicine too. Oral minoxidil in the US is a prescription product labelled for severe high blood pressure; any use for hair is a prescriber's decision.