What Is the Best Magnesium Glycinate Powder?
The best magnesium glycinate powder is Thorne Magnesium Bisglycinate: ChatGPT names it first, it is on two NSF testing lists, and each stick pack gives 200 mg of magnesium from bisglycinate alone. BulkSupplements Magnesium Glycinate Powder is on the same two lists and gives 300 mg, from glycinate and oxide, for $0.10 a day. We checked 15.
By Erin Rose Updated November 2026 How we score
1. Our pick, ChatGPT’s first choice, on two NSF lists
- Magnesium
- 200 mgIn 1 stick pack a day
- Form
- BisglycinateThe only magnesium on the label
- Cost
- $1.57 a day$47.00 for 30 stick packs
Why we pick it ChatGPT names Thorne first and calls it its first choice for quality and testing. It is on NSF/ANSI 173 and NSF Certified for Sport. The label lists magnesium bisglycinate as the only magnesium, with citric acid and monk fruit, and each stick pack is measured for you: mix one with at least 8 ounces of water. Want the lowest cost on both NSF lists? BulkSupplements is $0.10 a day for 300 mg, and its label lists glycinate and oxide. Thorne is the one ChatGPT names first and the one of the two whose label lists glycinate alone.
Which one should you buy?
2. BulkSupplements Magnesium Glycinate Powder: the same two NSF lists, lowest cost a day
300 mg of magnesium in 3/4 teaspoon, as magnesium glycinate and magnesium oxide, with nothing else added. It is on NSF/ANSI 173 and NSF Certified for Sport, and it costs the least of the 15 a day and per 100 mg of magnesium.
BulkSupplements Magnesium Glycinate Powder
$0.10 a day · $22.97 for 500 g
3. Codeage Liposomal Glycinate Powder: ChatGPT’s third pick, on NSF/ANSI 173
200 mg of magnesium in a 1.42 g scoop, from Albion bisglycinate chelate and magnesium oxide, in a liposomal base made with sunflower lecithin.
Codeage Liposomal Glycinate Powder
$0.50 a day · $29.99 for 3 oz
4. Nutricost Magnesium Glycinate Powder: the lowest cost a day with glycinate alone
210 mg of magnesium in a 1.8 g scoop as magnesium bisglycinate, and the label says other ingredients: none. It costs the least a day of the thirteen powders here whose label lists glycinate as the only magnesium.
Nutricost Magnesium Glycinate Powder
$0.15 a day · $19.95 for 250 g
Choose Thorne for ChatGPT’s first pick with glycinate alone on two testing lists, BulkSupplements for the same two lists at the lowest cost a day of the 15, Codeage for a liposomal powder, and Nutricost for the lowest cost a day with glycinate alone.
Thirteen of 15 powders list glycinate as the only magnesium, and three are on an NSF list
We checked 15 magnesium glycinate powders sold on Amazon. Thirteen list glycinate or bisglycinate as the only magnesium on the label. Two add magnesium oxide: BulkSupplements and Codeage. Three are on a third-party testing list from NSF International: Thorne and BulkSupplements on NSF/ANSI 173 and NSF Certified for Sport, and Codeage on NSF/ANSI 173.
All 15 print the magnesium a serving gives, from 120 mg (Trace Minerals) to 350 mg (KAL). Eight have no flavor or sweetener.
Here are all 15 in three groups. Our pick leads; each group then runs from lowest cost a day.
| Supplement | Magnesium a serving | On the label | Cost | Buy |
|---|---|---|---|---|
| On an NSF testing list | ||||
 Thorne Magnesium BisglycinateOur pick30 stick packs, lightly sweetened | 200 mg in 1 stick pack (3.8 g) | Bisglycinate; monk fruit | $1.57 a day$0.78 per 100 mg | See on Amazon |
| BulkSupplements Magnesium Glycinate Powder500 g, unflavoredOn NSF/ANSI 173 and NSF Certified for Sport; lowest cost a day and per 100 mg of the 15 | 300 mg in 3/4 teaspoon (2.2 g) | Glycinate and oxide | $0.10 a day$0.03 per 100 mg | See on Amazon |
| Codeage Liposomal Glycinate Powder3 oz, unflavoredOn NSF/ANSI 173; ChatGPT’s third pick; liposomal, with sunflower lecithin | 200 mg in 1 scoop (1.42 g) | Bisglycinate and oxide; monk fruit | $0.50 a day$0.25 per 100 mg | See on Amazon |
| Not on a testing list: unflavored, no sweetener | ||||
| Nutricost Magnesium Glycinate Powder250 g, unflavoredLowest cost a day of the 13 with glycinate as the only magnesium; nothing else added | 210 mg in 1 scoop (1.8 g) | Bisglycinate | $0.15 a day$0.07 per 100 mg | See on Amazon |
 NOW Magnesium Bisglycinate Powder8 oz, unflavoredLowest cost per 100 mg of the 13 with glycinate as the only magnesium | 300 mg in 1 level teaspoon (3 g) | Bisglycinate | $0.16 a day$0.05 per 100 mg | See on Amazon |
 Doctor’s Best Magnesium Glycinate Powder7.1 oz, unflavoredAlbion chelate; nothing else added | 200 mg in 1 scoop (2 g) | Lysinate glycinate | $0.20 a day$0.10 per 100 mg | See on Amazon |
 VIZANA Magnesium Bisglycinate Powder6.5 oz, unflavoredAlbion TRAACS chelate | 200 mg in 1 scoop (2 g) | Bisglycinate; adds black pepper extract 5 mg | $0.26 a day$0.13 per 100 mg | See on Amazon |
 Natural Factors Magnesium Glycinate Powder4.23 oz, unflavored | 200 mg in 1 scoop (2.4 g) | Glycinate | $0.28 a day$0.14 per 100 mg | See on Amazon |
 KAL Calming Magnesium Glycinate PowderUnflavoredMost magnesium a serving of the 15 | 350 mg in 1 rounded scoop (5.57 g) | Glycinate; adds citric acid 2 g | $0.42 a day$0.12 per 100 mg | See on Amazon |
 Seeking Health Magnesium Glycinate Powder75 servings, unflavoredAlbion chelate | 200 mg in 1 scoop (2.5 g) | Bisglycinate | $0.49 a day$0.25 per 100 mg | See on Amazon |
| Not on a testing list: flavored, sweetened with stevia | ||||
 Horbaach Magnesium Glycinate Powder1 lb, lemonAbout 100 servings a tub | 250 mg in 1 teaspoon (4.5 g) | Glycinate; stevia | $0.19 a day$0.08 per 100 mg | See on Amazon |
 Carlyle Magnesium Glycinate Powder8 oz, lemon | 250 mg in 1 teaspoon (4.5 g) | Glycinate; stevia | $0.29 a day$0.12 per 100 mg | See on Amazon |
 Trace Minerals Magnesium Glycinate PowderMixed berry lemonade | 120 mg in 1 scoop (3 g) | Glycinate; adds ConcenTrace trace minerals 50 mg; stevia | $0.35 a day$0.29 per 100 mg | See on Amazon |
 Natural Vitality MaxCalmRaspberry lemonadeDrink mix that adds calcium 100 mg and sodium 130 mg | 200 mg in 1.5 teaspoons (6 g) | Glycinate; adds calcium 100 mg, sodium 130 mg; stevia | $0.62 a day$0.31 per 100 mg | See on Amazon |
 Dr. Berg 4-in-1 Magnesium PowderRaspberry lemonAdds vitamin D3, vitamin B6 and zinc | 325 mg in 1 scoop (5 g) | Glycinate; adds vitamin D3 25 mcg, vitamin B6 1.7 mg, zinc 10 mg; stevia | $0.72 a day$0.22 per 100 mg | See on Amazon |
Compare the magnesium line, not the weight of the glycinate
The magnesium line on the Supplement Facts panel is what one serving gives you. The glycinate it comes from weighs more: Natural Factors prints 200 mg of magnesium from 1.9 g of magnesium glycinate, and Doctor’s Best 200 mg from 2,000 mg of chelate. ChatGPT makes the same point: 200 mg of magnesium glycinate is not 200 mg of magnesium. For each form on its own, see magnesium forms compared.
NIH puts the limit for magnesium from supplements at 350 mg a day
NIH says adults need 310 to 420 mg of magnesium a day from all sources, and sets 350 mg a day as the upper limit from supplements and medicines, not counting food. All 15 powders here give 350 mg or less a serving; Thorne gives 200 mg.
The Thorne and BulkSupplements labels side by side
The two labels
Questions people ask
How do I take Thorne Magnesium Bisglycinate?
One stick pack a day. Thorne says to mix 1 packet with at least 8 ounces of water daily. A box of 30 lasts 30 days.
Is Thorne Magnesium Bisglycinate third-party tested?
Yes. It is on NSF/ANSI 173 and NSF Certified for Sport. BulkSupplements is on both lists too, and Codeage’s liposomal powder is on NSF/ANSI 173.
Which magnesium glycinate powders have no flavor or sweetener?
Eight of the 15: BulkSupplements, Nutricost, NOW, Doctor’s Best, VIZANA, Natural Factors, KAL and Seeking Health. Thorne is lightly sweetened with monk fruit, Codeage also uses monk fruit, and Horbaach, Carlyle, Trace Minerals, Natural Vitality and Dr. Berg are flavored and sweetened with stevia.
How we picked
We started from ChatGPT’s answer to this exact question. It named Thorne first, Nootropics Depot’s glycinate powder second as its budget pick, and Codeage’s liposomal powder third. On Amazon, Nootropics Depot sells its magnesium glycinate as capsules. On November 9, 2026 we read the labels and Amazon listings of 15 magnesium glycinate powders and searched five testing lists for each: NSF/ANSI 173, NSF Certified for Sport, Informed Choice, Informed Sport and USP Verified. Prices are Amazon’s, read November 9, 2026.
We also read Thorne’s 60-scoop tub (same ingredient list), a second Nutricost listing with the same label, and Pure Encapsulations’ magnesium powder, which is magnesium citrate.
Sources
- Amazon listings and label photos of the 15 supplements above, prices read November 9, 2026.
- Testing lists, read November 9, 2026: NSF/ANSI 173 list; NSF Certified for Sport; Informed Choice; Informed Sport; USP Verified.
- NIH Office of Dietary Supplements, Magnesium fact sheet for consumers, read November 9, 2026.