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Cheapest Magnesium (Oxide and Citrate) on iHerb

Ranked by real cost per 100 mg of Magnesium (Oxide and Citrate) — cheapest value first.

Prices updated Jul 25, 2026 · 16 products · Prices in USD

The priciest option here costs about 38.6× more per 100 mg of Magnesium (Oxide and Citrate) than the best-value pick Sunergetic. 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
Sunergetic, Magnesium Complex, 500 mg, 120 Capsules
Sunergetic, Magnesium Complex, 500 mg, 120 Capsules
Sunergetic
500 mg12016.950.028View on iHerb →
2
Nature's Craft, Magnesium, Advanced Complex, 500 mg, 60 Capsules
Nature's Craft, Magnesium, Advanced Complex, 500 mg, 60 Capsules
Nature's Craft
500 mg609.990.033View on iHerb →
3
Nature's Life, Cal/Mag/Zinc Complex, 250 Tablets
Nature's Life, Cal/Mag/Zinc Complex, 250 Tablets
Nature's Life
600 mg8324.590.049View on iHerb →
4
Nature's Life, Cal/Mag/Zinc Complex, 250 Capsules
Nature's Life, Cal/Mag/Zinc Complex, 250 Capsules
Nature's Life
500 mg6224.090.078View on iHerb →
5
Nature's Life, Mega Minerals, 250 Vegetarian Capsules
Nature's Life, Mega Minerals, 250 Vegetarian Capsules
Nature's Life
500 mg6226.390.085View on iHerb →
6
Solgar, Calcium Magnesium Citrate, 250 Tablets
Solgar, Calcium Magnesium Citrate, 250 Tablets
Solgar
500 mg5022.400.090View on iHerb →
7
Nature's Life, Reinforce Bone Formula, 250 Capsules
Nature's Life, Reinforce Bone Formula, 250 Capsules
Nature's Life
500 mg6229.690.096View on iHerb →
8
Nature's Life, Mega Minerals, Iron Free, 100 Vegetarian Capsules
Nature's Life, Mega Minerals, Iron Free, 100 Vegetarian Capsules
Nature's Life
500 mg2512.190.098View on iHerb →
9
Nature's Life, Cal/Mag/Zinc Complex , 100 Capsules
Nature's Life, Cal/Mag/Zinc Complex , 100 Capsules
Nature's Life
500 mg2512.590.101View on iHerb →
10
Solgar, Calcium Magnesium Citrate, 100 Tablets
Solgar, Calcium Magnesium Citrate, 100 Tablets
Solgar
500 mg2011.840.118View on iHerb →
11
Pure Essence, LifeEssence, Whole Food Based Multivitamin, 240 Tablets
Pure Essence, LifeEssence, Whole Food Based Multivitamin, 240 Tablets
Pure Essence
200 mg6090.140.751View on iHerb →
12
Pure Essence, ProFema, 120 Tablets
Pure Essence, ProFema, 120 Tablets
Pure Essence
200 mg3049.360.823View on iHerb →
13
Pure Essence, LifeEssence™, 120 Tablets
Pure Essence, LifeEssence™, 120 Tablets
Pure Essence
200 mg3050.270.838View on iHerb →
14
Pure Essence, ProFema, Menopause Multa, 60 Tablets
Pure Essence, ProFema, Menopause Multa, 60 Tablets
Pure Essence
200 mg1529.500.983View on iHerb →
15
Pure Essence, Longevity Men, Mens Multivitamin & Mineral Supplement, 120 Tablet
Pure Essence, Longevity Men, Mens Multivitamin & Mineral Supplement, 120 Tablet
Pure Essence
200 mg3065.271.09View on iHerb →
16
Pure Essence, Longevity Women, Women's Multivitamin & Mineral Supplement, 120 Tablets
Pure Essence, Longevity Women, Women's Multivitamin & Mineral Supplement, 120 Tablets
Pure Essence
200 mg3065.531.09View on iHerb →

How we rank Magnesium (Oxide and Citrate)

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.