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Cheapest Magnesium (as Trimagnesium Citrate) on iHerb

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

Prices updated Jul 25, 2026 · 12 products · Prices in USD

The priciest option here costs about 83.8× more per 100 mg of Magnesium (as Trimagnesium Citrate) than the best-value pick California Gold Nutrition. 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
California Gold Nutrition, Magnesium Powder Beverage, Unflavored, 10 oz (283 g)
California Gold Nutrition, Magnesium Powder Beverage, Unflavored, 10 oz (283 g)
California Gold Nutrition
350 mg11321.630.055View on iHerb →
2
California Gold Nutrition, Magnesium Powder Beverage, Orange, 13.4 oz (380 g)
California Gold Nutrition, Magnesium Powder Beverage, Orange, 13.4 oz (380 g)
California Gold Nutrition
290 mg10931.330.099View on iHerb →
3
Nature's Craft, Magnesium Gummies, Sugar Free, Raspberry, 60 Gummies
Nature's Craft, Magnesium Gummies, Sugar Free, Raspberry, 60 Gummies
Nature's Craft
180 mg3012.990.241View on iHerb →
4
Ghost, Sleep, Blue Dream, 9.5 oz (270 g)
Ghost, Sleep, Blue Dream, 9.5 oz (270 g)
Ghost
200 mg2049.991.25View on iHerb →
5
Ghost, Sleep, Apple Pie, 9.2 oz (260 g)
Ghost, Sleep, Apple Pie, 9.2 oz (260 g)
Ghost
200 mg2049.991.25View on iHerb →
6
Revive, Thyroid Support, 90 Capsules
Revive, Thyroid Support, 90 Capsules
Revive
50 mg3031.992.13View on iHerb →
7
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Sour Apple, 1.2 lb (540 g)
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Sour Apple, 1.2 lb (540 g)
Ronnie Coleman
22 mg3022.493.44View on iHerb →
8
C4 / Cellucor, C4® Energy + Aminos, Grape, 8.7 oz (246 g)
C4 / Cellucor, C4® Energy + Aminos, Grape, 8.7 oz (246 g)
C4 / Cellucor
20 mg3023.994.00View on iHerb →
9
C4 / Cellucor, C4® Energy + Aminos, Blue Raspberry, 8.8 oz (249 g)
C4 / Cellucor, C4® Energy + Aminos, Blue Raspberry, 8.8 oz (249 g)
C4 / Cellucor
20 mg3023.994.00View on iHerb →
10
C4 / Cellucor, C4® Energy + Aminos, Watermelon, 8.7 oz (246 g)
C4 / Cellucor, C4® Energy + Aminos, Watermelon, 8.7 oz (246 g)
C4 / Cellucor
20 mg3023.994.00View on iHerb →
11
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Cherry Limeade, 1.2 lbs (553 g)
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Cherry Limeade, 1.2 lbs (553 g)
Ronnie Coleman
22 mg3029.994.59View on iHerb →
12
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Blue Razz, 1.2 lb [554 g]
Ronnie Coleman, Signature Series, Amino Tone + EAA™, Blue Razz, 1.2 lb [554 g]
Ronnie Coleman
22 mg3029.994.59View on iHerb →

How we rank Magnesium (as Trimagnesium 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.