Verified Supplement Data

Third-Party Tested Melatonin 2026: Which Are Certified

Nature Made Melatonin 3 mg is USP Verified, a public testing list. 12 of the 29 melatonin products we read are on a public testing list; two of these are sold through our links: Nature Made 3 mg tablets and Nature Made 2.5 mg gummies.

By Erin Rose Updated October 12, 2026 How we score

Our recommendation

Buy Nature Made Melatonin 3 mg

USP says it checks that a product holds the ingredients on the label. Each tablet has 3 mg, inside the 0.5 to 5 mg range most studies used, for $0.051 a night at Nature Made’s list price.

Buy on Amazon

Ask a doctor first if you take a blood thinner or have epilepsy, or before giving melatonin to a child (NIH). Side effects · how much to take.

On a testing list (2 of 12 are sold through our links)

Of the 12 listed products we read, 6 are USP Verified and 6 are on NSF/ANSI 173; 2 of those 6 are also NSF Certified for Sport. What each list checks

  1. Our pick

    Nature Made Melatonin 3 mg

    USP Verified

    3 mg melatonin a tablet · 240 tablets in the bottle we price

    $0.051 a night
    list price

    Buy on Amazon

  2. If you want a gummy

    Nature Made Melatonin 2.5 mg Gummies

    USP Verified

    2.5 mg melatonin a gummy · 130 gummies in the bottle we price

    $0.18 a night
    list price

    See it on our gummies page

Example: says “tested,” but not on a public list

Nature’s Bounty is one example. Its label says the product was tested but names no outside lab, so you cannot look it up. Other labels we read also say “lab tested”; none of those is on a public list either.

  1. Nature's Bounty Melatonin 3 mg Quick Dissolve

    Not on a public list

    3 mg melatonin a tablet, dissolves under the tongue

    Its label says “Guaranteed Quality Laboratory Tested.” It names no outside lab, so this is the brand’s own word.

    $0.062 a night
    list price

    Check price

No testing claim on the label

These labels say nothing about outside testing.

  1. Life Extension Melatonin 300 mcg

    Not on a public list

    0.3 mg melatonin a capsule

    $0.15 a night
    list price

    Check price

  2. Life Extension Melatonin 6 Hour Timed Release 300 mcg

    Not on a public list

    0.3 mg melatonin a tablet, timed release

    $0.18 a night
    list price

    Check price

  3. Natrol Melatonin 5 mg Gummies

    Not on a public list

    5 mg melatonin a gummy

    $0.18 a night
    list price

    Check price

  4. Nature's Truth Low Dose Melatonin 1 mg Gummies

    Not on a public list

    1 mg melatonin a gummy

    $0.20 a night
    list price

    Check price

A night is the fewest whole servings that reach 0.5 mg, at each brand’s list price (Vitacost where the brand store shows none), checked October 12, 2026. We quote no Amazon prices. We score 3 more melatonin products; see what every melatonin we score costs.

No list price

We could not find a brand list price to compare for these. Neither is on a public testing list.

Why testing matters for melatonin

Lab studies have found melatonin amounts far from the label. In 31 supplements tested in Canada, melatonin ran from 83% below to 478% above the label. The same product varied by up to 465% from batch to batch (Erland 2017). In 25 gummies sold in the US, 22 were off by more than 10%, from 74% to 347% of the label (Cohen 2023; one sample per brand).

A testing list means an outside group checks the product and lists it by name, so you can look it up. We found no study that compared the accuracy of listed and unlisted melatonin.

What each list checks

There are two kinds. Some lists check the label amount: that the bottle holds what the label says, without harmful contaminants. Others also test for drugs banned in sport, which matters only if you are drug-tested. “Lab tested” printed on a label, with no program named, is the brand’s word.

The three lists melatonin products appear on, in each program’s own words.
ListWhat it checksHow it checks
USP Verifiedchecks the label amount That the product holds the ingredients on the label in the stated amounts, has no harmful levels of listed contaminants, breaks down in a set time, and is made under FDA good manufacturing practice.Audits, lab tests before listing, and tests of listed products bought off the shelf.
NSF/ANSI 173checks the label amount That the product holds the ingredients on the label and nothing else, and has no harmful levels of contaminants.Annual audits, and NSF retests each product from time to time. Not a banned-substance program.
NSF Certified for Sportalso tests for drugs banned in sport The label matches the contents, plus screening for substances banned in sport.Factory audits; listings can be searched by lot.

How to check your bottle

  1. Find the mark. Look for a USP or NSF mark on the bottle. “Lab tested” with no program named is a claim.
  2. Open the program’s own list. USP Verified, NSF/ANSI 173, NSF Certified for Sport. Or search them on our testing-list index.
  3. Match the strength and form. Nature Made’s listing is for its 3 mg tablet. Other strengths and gummies are listed, or not, on their own.

Questions

Which melatonin is third-party tested?

Nature Made Melatonin 3 mg is USP Verified. 12 of the 29 melatonin products we read are on a public testing list: 6 are USP Verified and 6 are on NSF/ANSI 173; 2 of those 6 are also NSF Certified for Sport. Two of these are sold through our links: Nature Made 3 mg tablets and Nature Made 2.5 mg gummies.

Is Nature Made melatonin USP Verified?

Yes, the 3 mg tablet. USP’s list includes “Nature Made Melatonin 3 Mg Tablets” (list checked September 22, 2026).

Is Nature’s Bounty melatonin third-party tested?

Its 3 mg quick-dissolve label says “Guaranteed Quality Laboratory Tested,” but it names no outside lab, and it is not on the USP or NSF lists we searched.

Are melatonin gummies third-party tested?

Some are. Nature Made Melatonin 2.5 mg Gummies are USP Verified; they are our gummy pick on our melatonin gummies page. USP Verified lists some other melatonin gummies too.

Does a testing list mean the dose is accurate?

Not for certain. USP says it checks that a product holds the ingredients on the label, through audits, lab tests before listing and tests of samples bought off the shelf. Lab studies have found melatonin amounts far off the label (Erland 2017; Cohen 2023). No study we read compared the accuracy of listed and unlisted melatonin.

The best melatonin · melatonin gummies · melatonin guide.

Sources

  1. USP Verified list, checked September 22, 2026: “Nature Made Melatonin 3 Mg Tablets.” NSF/ANSI 173 list, checked August 25, 2026. NSF Certified for Sport list, checked October 1, 2026.
  2. Labels and testing claims: each brand’s product page and the NIH Dietary Supplement Label Database (Nature Made: NIH label 179777), read October 12, 2026. Prices: each brand’s list price, checked October 12, 2026. We quote no Amazon prices.
  3. Erland LA, Saxena PK. Melatonin natural health products and supplements: presence of serotonin and significant variability of melatonin content. J Clin Sleep Med. 2017. PubMed 27855744
  4. Cohen PA, et al. Quantity of melatonin and CBD in melatonin gummies sold in the US. JAMA. 2023. PubMed 37097362
  5. NIH National Center for Complementary and Integrative Health. Melatonin: What You Need To Know (last updated May 2024; read October 12, 2026).