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Cheapest Magnesium (as 95% magnesium oxide and magnesium glycinate chelate) on iHerb

Ranked by real cost per 100 mg of Magnesium (as 95% magnesium oxide and magnesium glycinate chelate) — cheapest value first.

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

The priciest option here costs about 9.5× more per 100 mg of Magnesium (as 95% magnesium oxide and magnesium glycinate chelate) than the best-value pick Vitamatic. 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
Vitamatic, Magnesium Glycinate Powder, 8.8 oz (250 g)
Vitamatic, Magnesium Glycinate Powder, 8.8 oz (250 g)
Vitamatic
300 mg25014.990.020View on iHerb →
2
NutriBiotic, Essentials, Calcium Magnesium, 250 Capsules
NutriBiotic, Essentials, Calcium Magnesium, 250 Capsules
NutriBiotic
125 mg25014.620.047View on iHerb →
3
Vitamatic, Magnesium with B6, 180 Vegetarian Tablets
Vitamatic, Magnesium with B6, 180 Vegetarian Tablets
Vitamatic
150 mg18014.990.056View on iHerb →
4
NutriBiotic, Essentials, Calcium Magnesium, 100 Gluten Free Capsules
NutriBiotic, Essentials, Calcium Magnesium, 100 Gluten Free Capsules
NutriBiotic
125 mg1007.190.058View on iHerb →
5
Solgar, Chelated Magnesium, 250 Tablets (100 mg per Tablet)
Solgar, Chelated Magnesium, 250 Tablets (100 mg per Tablet)
Solgar
400 mg6222.400.090View on iHerb →
6
Nature's Craft, Triple Magnesium Complex, 180 Capsules (133 mg per Capsule)
Nature's Craft, Triple Magnesium Complex, 180 Capsules (133 mg per Capsule)
Nature's Craft
400 mg6021.990.092View on iHerb →
7
Nature's Craft, Magnesium Glycinate, 120 Capsules (125 mg per Capsule)
Nature's Craft, Magnesium Glycinate, 120 Capsules (125 mg per Capsule)
Nature's Craft
500 mg3014.990.100View on iHerb →
8
Natural Vitality, CALM®, Relaxing Drink Mix, Sweet Lemon, 8 oz (227 g)
Natural Vitality, CALM®, Relaxing Drink Mix, Sweet Lemon, 8 oz (227 g)
Natural Vitality
325 mg5720.240.109View on iHerb →
9
Natural Vitality, CALM®, Relaxing Drink Mix, Orange, 8 oz (227 g)
Natural Vitality, CALM®, Relaxing Drink Mix, Orange, 8 oz (227 g)
Natural Vitality
325 mg5720.240.109View on iHerb →
10
Nature's Craft, Triple Magnesium Complex, 120 Capsules (133 mg per Capsule)
Nature's Craft, Triple Magnesium Complex, 120 Capsules (133 mg per Capsule)
Nature's Craft
400 mg4017.990.112View on iHerb →
11
Solaray, Magnesium, Potassium, Asporotates with Bromelain, 60 Vegcaps
Solaray, Magnesium, Potassium, Asporotates with Bromelain, 60 Vegcaps
Solaray
300 mg3010.190.113View on iHerb →
12
Nature's Craft, Triple Magnesium Complex, 90 Capsules (133 mg per Capsule)
Nature's Craft, Triple Magnesium Complex, 90 Capsules (133 mg per Capsule)
Nature's Craft
400 mg3013.990.117View on iHerb →
13
Solgar, Chelated Magnesium, 100 Tablets (100 mg per Tablet)
Solgar, Chelated Magnesium, 100 Tablets (100 mg per Tablet)
Solgar
400 mg2512.290.123View on iHerb →
14
Nature's Craft, Magnesium Glycinate, 240 Capsules (100 mg per Capsule)
Nature's Craft, Magnesium Glycinate, 240 Capsules (100 mg per Capsule)
Nature's Craft
400 mg6029.990.125View on iHerb →
15
PlantFusion, Seawater Magnesium, 120 Organic Vegan Caps
PlantFusion, Seawater Magnesium, 120 Organic Vegan Caps
PlantFusion
375 mg6029.230.130View on iHerb →
16
Focus Factor, Nutrition For The Brain, Original Formula, 90 Tablets
Focus Factor, Nutrition For The Brain, Original Formula, 90 Tablets
Focus Factor
100 mg22529.910.133View on iHerb →
17
Futurebiotics, Relax & Sleep®, 120 Vegetarian Tablets
Futurebiotics, Relax & Sleep®, 120 Vegetarian Tablets
Futurebiotics
75 mg12012.250.136View on iHerb →
18
Nature's Craft, Magnesium Glycinate, 180 Capsules (100 mg per Capsule)
Nature's Craft, Magnesium Glycinate, 180 Capsules (100 mg per Capsule)
Nature's Craft
400 mg4524.990.139View on iHerb →
19
Nature's Craft, Magnesium Glycinate, 120 Capsules (100 mg per Capsule)
Nature's Craft, Magnesium Glycinate, 120 Capsules (100 mg per Capsule)
Nature's Craft
400 mg3016.990.142View on iHerb →
20
PlantFusion, Vegan SeaWater Magnesium, 60 Organic Vegan Caps
PlantFusion, Vegan SeaWater Magnesium, 60 Organic Vegan Caps
PlantFusion
375 mg3016.480.147View on iHerb →
21
World Organic, Multi Liqui-Mins, 16 fl oz (474 ml)
World Organic, Multi Liqui-Mins, 16 fl oz (474 ml)
World Organic
300 mg3114.930.161View on iHerb →
22
LifeSeasons, Magnesium Glycinate, 120 Veg Capsules (87.5 mg per Capsule)
LifeSeasons, Magnesium Glycinate, 120 Veg Capsules (87.5 mg per Capsule)
LifeSeasons
350 mg3017.000.162View on iHerb →
23
NaturesPlus, Cal/Mag Citrate, 90 Capsules
NaturesPlus, Cal/Mag Citrate, 90 Capsules
NaturesPlus
250 mg3012.280.164View on iHerb →
24
Futurebiotics, Relax & Sleep® with L-Theanine, 60 Vegetarian Tablets
Futurebiotics, Relax & Sleep® with L-Theanine, 60 Vegetarian Tablets
Futurebiotics
75 mg607.970.177View on iHerb →
25
Codeage, Liposomal Magnesium Glycinate, 240 Vegetable Capsules
Codeage, Liposomal Magnesium Glycinate, 240 Vegetable Capsules
Codeage
350 mg6039.990.190View on iHerb →

How we rank Magnesium (as 95% magnesium oxide and magnesium glycinate chelate)

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.