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Cheapest Magnesium (as Magnesium Bisglycinate) on iHerb

Ranked by real cost per 100 mg of Magnesium (as Magnesium Bisglycinate) — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 19.8× more per 100 mg of Magnesium (as Magnesium Bisglycinate) than the best-value pick Micro Ingredients. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Micro Ingredients, Pure Magnesium Glycinate, 300 Capsules
Micro Ingredients, Pure Magnesium Glycinate, 300 Capsules
Micro Ingredients
1,000 mg15021.990.015View on iHerb →
2
Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)
Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)
Micro Ingredients
350 mg12019.990.048View on iHerb →
3
Micro Ingredients, Magnesium Glycinate, 240 Capsules (133 mg per Capsule)
Micro Ingredients, Magnesium Glycinate, 240 Capsules (133 mg per Capsule)
Micro Ingredients
400 mg8019.990.063View on iHerb →
4
Micro Ingredients, L-Theanine + Magnesium Glycinate , 400 Softgels
Micro Ingredients, L-Theanine + Magnesium Glycinate , 400 Softgels
Micro Ingredients
200 mg20024.990.063View on iHerb →
5
Micro Ingredients, Magnesium Glycinate, 240 Capsules (166 mg per Capsule)
Micro Ingredients, Magnesium Glycinate, 240 Capsules (166 mg per Capsule)
Micro Ingredients
500 mg8029.950.075View on iHerb →
6
The Vitamin Shoppe, Magnesium Glycinate Powder, Unflavored, 7.23 oz (205 g)
The Vitamin Shoppe, Magnesium Glycinate Powder, Unflavored, 7.23 oz (205 g)
The Vitamin Shoppe
250 mg9122.990.101View on iHerb →
7
TypeZero, Clean, Magnesium Glycinate, 180 Capsules (70 mg per Capsule)
TypeZero, Clean, Magnesium Glycinate, 180 Capsules (70 mg per Capsule)
TypeZero
210 mg6013.950.111View on iHerb →
8
The Vitamin Shoppe, Magnesium Glycinate, 120 Softgel (200 mg per Softgel)
The Vitamin Shoppe, Magnesium Glycinate, 120 Softgel (200 mg per Softgel)
The Vitamin Shoppe
400 mg6034.990.146View on iHerb →
9
Nature's Truth, Magnesium Glycinate, Chelated, 120 Quick Release Capsules (100 mg per Capsule)
Nature's Truth, Magnesium Glycinate, Chelated, 120 Quick Release Capsules (100 mg per Capsule)
Nature's Truth
200 mg6017.790.148View on iHerb →
10
Mason Natural, Optimum Absorption Magnesium Glycinate with BioPerine®, 60 Capsules
Mason Natural, Optimum Absorption Magnesium Glycinate with BioPerine®, 60 Capsules
Mason Natural
240 mg3010.990.153View on iHerb →
11
The Vitamin Shoppe, Magnesium Glycinate, 60 Softgels (200 mg per Softgel)
The Vitamin Shoppe, Magnesium Glycinate, 60 Softgels (200 mg per Softgel)
The Vitamin Shoppe
400 mg3019.990.167View on iHerb →
12
Forest Leaf, Magnesium Glycinate, Maximum Absorption, 90 Vegetable Capsules (133.3 mg per Capsule)
Forest Leaf, Magnesium Glycinate, Maximum Absorption, 90 Vegetable Capsules (133.3 mg per Capsule)
Forest Leaf
400 mg3019.990.167View on iHerb →
13
Trace, Magnesium Glycinate, 120 mg, 180 Capsules
Trace, Magnesium Glycinate, 120 mg, 180 Capsules
Trace
120 mg18037.990.176View on iHerb →
14
Nature's Truth, Non-Buffered Magnesium Glycinate Powder, Natural Lemon , 6 oz (170 g)
Nature's Truth, Non-Buffered Magnesium Glycinate Powder, Natural Lemon , 6 oz (170 g)
Nature's Truth
250 mg3816.950.178View on iHerb →
15
Trace, Magnesium Glycinate, 90 Capsules
Trace, Magnesium Glycinate, 90 Capsules
Trace
120 mg9020.240.187View on iHerb →
16
Nature's Truth, Magnesium Glycinate, Chelated, 60 Quick Release Capsules (100 mg per Capsule)
Nature's Truth, Magnesium Glycinate, Chelated, 60 Quick Release Capsules (100 mg per Capsule)
Nature's Truth
200 mg3011.300.188View on iHerb →
17
BioEmblem, Magnesium Glycinate with Zinc Picolinate, 90 Veggie Caps
BioEmblem, Magnesium Glycinate with Zinc Picolinate, 90 Veggie Caps
BioEmblem
300 mg4525.990.193View on iHerb →
18
Pure Encapsulations, Magnesium (Glycinate), 360 Capsules (120 mg per Capsule)
Pure Encapsulations, Magnesium (Glycinate), 360 Capsules (120 mg per Capsule)
Pure Encapsulations
120 mg36087.000.201View on iHerb →
19
Nature's Bounty, Magnesium Glycinate, High Absorption, 120 Capsules (120 mg per Capsule)
Nature's Bounty, Magnesium Glycinate, High Absorption, 120 Capsules (120 mg per Capsule)
Nature's Bounty
240 mg6031.280.217View on iHerb →
20
Nature's Bounty, Advanced Magnesium Glycinate, High Absorption, 90 Capsules (120 mg per Capsule)
Nature's Bounty, Advanced Magnesium Glycinate, High Absorption, 90 Capsules (120 mg per Capsule)
Nature's Bounty
360 mg3026.990.250View on iHerb →
21
Pure Encapsulations, Magnesium (Glycinate), 120 mg, 90 Capsules
Pure Encapsulations, Magnesium (Glycinate), 120 mg, 90 Capsules
Pure Encapsulations
120 mg9027.000.250View on iHerb →
22
Force Factor, Ultimate Magnesium Glycinate Drink Mix, Raspberry Lemon, 4.36 oz (123.6 g)
Force Factor, Ultimate Magnesium Glycinate Drink Mix, Raspberry Lemon, 4.36 oz (123.6 g)
Force Factor
300 mg3024.990.278View on iHerb →
23
Divine Health, Don Colbert M.D. Sleep-Ease, Natural Mixed Berry, 5.29 oz (150 g)
Divine Health, Don Colbert M.D. Sleep-Ease, Natural Mixed Berry, 5.29 oz (150 g)
Divine Health
300 mg3025.190.280View on iHerb →
24
Trace, Magnesium Glycinate Powder, Mixed Berry Lemonade, 6.35 oz (180 g)
Trace, Magnesium Glycinate Powder, Mixed Berry Lemonade, 6.35 oz (180 g)
Trace
120 mg6020.990.292View on iHerb →
25
Trace, Magnesium Glycinate Powder, Grape, 6.35 oz (180 g)
Trace, Magnesium Glycinate Powder, Grape, 6.35 oz (180 g)
Trace
120 mg6020.990.292View on iHerb →

How we rank Magnesium (as Magnesium Bisglycinate)

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.