Our verdict
Nootropics Depot earns its place at the top of our provisional order with evidence, not reputation. The product page links signed, lot-matched certificates of analysis, so you can find the report for the bottle in your hand. The label is plain: 200 mg of elemental magnesium from 1,600 mg of magnesium bisglycinate chelate in two capsules. At $27.99 for 180 capsules it works out to about $0.16 per 100 mg. The main caveat is that a certificate is only as useful as what it tests, so read the analytes and the issuing lab.
Best for: Shoppers who want to match a lab report to their own bottle, at a low cost per 100 mg.
Check Nootropics Depot's current price, shipping and return terms on the seller's site.
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Dose, formula and the elemental magnesium calculation
The label lists 200 mg of elemental magnesium per two-capsule serving, from 1,600 mg of magnesium bisglycinate chelate monohydrate. That is 50% of the Daily Value. The brand says the capsules are fully chelated and not buffered with magnesium oxide.
The directions call for two capsules once daily. That keeps a single serving well under the 350 mg adult upper limit for supplemental magnesium, though you still need to count multivitamins, antacids and other products. The product page did not list capsule or flow-agent ingredients when we checked.
Testing and manufacturing: what has actually been verified?
Nootropics Depot asks buyers to find the lot number on their bottle and open the matching certificate of analysis. We counted ten signed lot reports linked on the page. The page also shows images of ISO/IEC, FDA registration and cGMP certificates.
That puts this product on tier 1 of our evidence ladder: product-specific results anyone can open. Two cautions apply. First, check which analytes each report covers (identity, elemental magnesium content, heavy metals, microbes) and the methods used. Second, check whether the issuing lab is independent and accredited. A downloadable PDF is strong evidence, not proof of every quality attribute.
Evidence tiers: tier 1 is publicly verifiable, product-specific evidence; tier 2 is product-specific evidence our editors verified privately; tier 3 is manufacturer-level information without finished-product results; tier 4 is unverified. Full definitions.
Price and value: the fair way to compare
| Option | Price | Per serving | Per 100 mg |
|---|---|---|---|
| One-time, 180 capsules | $27.99 | $0.31 | $0.16 |
A 360-capsule size is also listed; we did not confirm its price on the brand page. Shipping was not shown on the product page. We compare one-time prices on the same date across brands, never a sale price against another brand's list price. Cost per 100 mg is a comparison tool, not a dose recommendation.
Cost per 100 mg across all eight
We may earn a commission from qualifying purchases. Our rating method is independent of compensation.
Customer reviews, reputation and support
The product page showed 19 reviews with no star average displayed when we checked. That is a small sample, so it carries little weight in our review score. Look for repeated reports about capsule size, stomach upset or shipping rather than the star count.
We weigh verified-purchase feedback, sample size, review dates and repeated complaints such as tablet size, stomach upset or shipping delays. We don't treat self-reported sleep changes or a five-star average as clinical evidence.
Claims check
The page describes calming, sleep and mood benefits. Magnesium has normal roles in nerve function, but the human evidence that a supplement improves sleep is limited and inconsistent. See the evidence for magnesium and sleep.
Who should consider it, and who might choose an alternative?
Pros
- Lot-matched certificates of analysis on the product page
- 200 mg elemental per two capsules, clearly stated
- About $0.16 per 100 mg
- Not buffered with magnesium oxide
Cons
- Small review sample (19)
- Other ingredients not listed on the page
- Certificate scope varies; read the analytes
Alternatives worth comparing
Frequently asked questions
How much elemental magnesium does Nootropics Depot provide?
200 mg of elemental magnesium per two-capsule serving, from 1,600 mg of magnesium bisglycinate chelate.
Is Nootropics Depot magnesium glycinate third-party tested?
The product page links signed, lot-matched certificates of analysis. Check the analytes, methods and issuing lab on the report that matches your lot.
Is Nootropics Depot magnesium good for sleep?
No magnesium product has strong evidence for treating insomnia. One 2025 trial of bisglycinate found a modest benefit; a 2026 review rated the overall evidence low certainty.
Is it the best value?
At about $0.16 per 100 mg it is among the lowest we found. NOW Foods and Doctor's Best cost slightly less per 100 mg but have less testing documentation.
How we reviewed Nootropics Depot
We reviewed the product page, Supplement Facts, price and any testing documents on November 10, 2026, and compared them with the published human research. We have not lab tested this product ourselves. Rankings follow how we score supplement quality, and the same criteria apply to every brand. Read our affiliate disclosure, magnesium glycinate versus other forms, magnesium glycinate sleep evidence and magnesium for muscle and exercise.
Sources
- nootropicsdepot.com product page, checked Nov 10, 2026
- NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals.
- Lopresti AL, Smith SJ, Drummond PD. Magnesium Supplementation for Sleep in Adults: A Systematic Review of Randomized Controlled Trials. Journal of Dietary Supplements, 2026.
- Schuster J, Cycelskij I, Lopresti A, Hahn A. Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep, 2025.
Last source review: November 10, 2026. Next scheduled price check: December 2026. Spot an error? See our corrections policy.