Best Magnesium Glycinate Supplements: Compare 5 Options

Which magnesium glycinate fits your priority?

These are US label distinctions, not head-to-head clinical results. The magnesium line shows the elemental amount, not the full chelate weight. Labels are linked in the sources.

What are the differences between these five products?

Pure: a 120 mg capsule unit

The reviewed Pure label supplies 120 mg per capsule and lists a vegetarian capsule and ascorbyl palmitate. A smaller counted unit may suit someone comparing lower amounts, but it is not evidence of superior absorption. Check the bottle count: 30 capsules and a larger bottle do not have the same serving cost. [1]

Our Pure Magnesium Glycinate review explains the exact label and price comparison.

NOW: a two-tablet serving

NOW’s reviewed label provides 200 mg across two tablets. A 90-tablet bottle contains 45 servings; a 180-tablet bottle contains 90. Compare the exact size when checking price. Tablets also contain ingredients used to form and coat them, so do not describe this as an ingredient-free formula. [2]

Read the NOW product analysis and NOW testing and quality review if its lower price is what attracts you.

Solaray capsules: four capsules plus BioPerine

The reviewed 120-VegCap label provides 350 mg per four capsules and 5 mg BioPerine black-pepper extract. That gives 30 labeled servings, not 120. If avoiding black-pepper extract is important, examine a different formula rather than assuming all glycinate products have the same ingredients. [3]

See the Solaray capsule review for serving details and the Solaray brand review for its quality claims.

Solaray powder: no added sweetener on the reviewed label

The reviewed powder has 350 mg per rounded 5.57 g scoop, with citric acid as the other ingredient. No sweetener or BioPerine appears on that panel. Unsweetened does not mean tasteless, and estimating part of a rounded scoop is not a validated method for a precise smaller amount. [4]

Compare the powder’s label with the capsules; they are not interchangeable packages.

Thorne powder: a specific sport-certification record

The reviewed powder supplies 200 mg per scoop and includes citric acid and monk fruit concentrate. NSF’s record 1205063 identifies an unflavored 187 g powder, a 3.11 g scoop and specific lots. A separate listing, 1507934, identifies a 226.2 g package and 3.77 g scoop. Match the record to the bottle rather than transferring certification between versions. [5] [11]

The similarly named Thorne glycinate capsule is not this powder. Our Thorne powder review covers the comparison; our glycinate versus bisglycinate guide explains the terminology.

Which testing evidence should decide your choice?

An exact independent product listing is more specific than a facility badge, but it is not proof of better clinical results. If sport certification is essential, check the certifier’s product and lot record. If you want contaminant results, ask for a finished-product report naming your batch, laboratory and test specifications.

We have not independently tested these bottles or obtained equivalent batch reports for all five. A lack of a public report is not proof of a failed test. It is a reason to distinguish known evidence from an assumption. See how USP and NSF marks differ.

How should you compare price and value?

Compare the same ingredient quantity, bottle size and purchasing terms. Do not rank a promotional NOW price against a full-price powder and call the result a permanent budget winner. Check current one-time prices, shipping and any conditions at the seller.

A different formulation sometimes fits better than the cheapest quantity. Doctor’s Best High Absorption Magnesium, for example, uses a lysinate glycinate chelate. It is an alternative to examine, not an identical sixth formula. The brand review explains that difference.

What does “without fillers” actually mean?

Name the ingredient you want to avoid: a sweetener, capsule material, flow agent or black-pepper extract. An unsweetened powder can contain citric acid; a capsule can contain ascorbyl palmitate; a tablet needs binding ingredients. A shorter list alone does not prove better safety or effectiveness.

For powder-specific choices, use our magnesium glycinate powder comparison. It answers a narrower question rather than repeating this capsule-and-tablet comparison.

What about sleep, diarrhea and safety?

No head-to-head evidence presented here establishes a sleep winner. Persistent sleep problems deserve more than a change of brand. Magnesium glycinate can still cause digestive symptoms; format and marketing do not guarantee tolerance.

The US adult upper limit is 350 mg daily from supplements and medicines, excluding food magnesium. It is a limit, not a target. Kidney impairment and medicines can change suitability. [10] For the ingredient decision, begin with our magnesium guide rather than treating the largest label serving as the best choice.

How we compared these products

We compared public US Supplement Facts, serving counts, formats, inactive ingredients and named certification records. The five products represent different shopping priorities, not every product on the market. This is an editorial label comparison, not a hands-on test, clinical trial or lab ranking. Purchase links do not establish superior effectiveness.

We removed stale promotional rankings, checked retailer package matches for the linked NOW and Solaray capsules, and rechecked the two Thorne certification records. Prices at checkout can change. If a reformulated label or different package disagrees with this page, use the exact current label and let us know.