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Cheapest Magnesium (CTM) on iHerb

Ranked by real cost per 10 mg of Magnesium (CTM) — cheapest value first.

Prices updated Jul 25, 2026 · 21 products · Prices in USD

The priciest option here costs about 146.1× more per 10 mg of Magnesium (CTM) than the best-value pick Trace. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 10 mg
1
Trace, Ionic Magnesium Chloride, 400 mg, 4 fl oz ( 118 ml)
Trace, Ionic Magnesium Chloride, 400 mg, 4 fl oz ( 118 ml)
Trace
400 mg3019.990.017View on iHerb →
2
Trace, ConcenTrace®, Daily Mineral Powder, Blue Raspberry, 4.65 oz (132 g)
Trace, ConcenTrace®, Daily Mineral Powder, Blue Raspberry, 4.65 oz (132 g)
Trace
100 mg6032.990.055View on iHerb →
3
Trace, ConcenTrace®, Daily Mineral Powder, Natural Blue Hawaiian, 4.65 oz (132 g)
Trace, ConcenTrace®, Daily Mineral Powder, Natural Blue Hawaiian, 4.65 oz (132 g)
Trace
100 mg6032.990.055View on iHerb →
4
Trace, Ionic Iodine Liquid, 2 fl oz (59 ml)
Trace, Ionic Iodine Liquid, 2 fl oz (59 ml)
Trace
8 mg29519.990.085View on iHerb →
5
Trace, No! Muscle Cramps, 4.06 fl oz (120 ml)
Trace, No! Muscle Cramps, 4.06 fl oz (120 ml)
Trace
35 mg6019.990.095View on iHerb →
6
Trace, Endure, Liquid Electrolyte Supplement, 4 fl oz (118 ml)
Trace, Endure, Liquid Electrolyte Supplement, 4 fl oz (118 ml)
Trace
45 mg4823.990.111View on iHerb →
7
Trace, Ionic Zinc, 50 mg, 2 fl oz (59 ml)
Trace, Ionic Zinc, 50 mg, 2 fl oz (59 ml)
Trace
25 mg4814.990.125View on iHerb →
8
Trace, Endure, Liquid Electrolyte Supplement, 1 fl oz (30 ml)
Trace, Endure, Liquid Electrolyte Supplement, 1 fl oz (30 ml)
Trace
45 mg127.500.139View on iHerb →
9
Trace, Ionic Potassium, 2 fl oz (59 ml)
Trace, Ionic Potassium, 2 fl oz (59 ml)
Trace
30 mg3314.990.151View on iHerb →
10
Trace, Ionic Iron, 1.9 fl oz (56 ml)
Trace, Ionic Iron, 1.9 fl oz (56 ml)
Trace
20 mg4614.990.163View on iHerb →
11
Trace, Ionic Boron, 2 fl oz (59 ml)
Trace, Ionic Boron, 2 fl oz (59 ml)
Trace
25 mg4819.990.167View on iHerb →
12
Trace, Ionic Chromium, 2 fl oz (59 ml)
Trace, Ionic Chromium, 2 fl oz (59 ml)
Trace
20 mg4819.990.208View on iHerb →
13
Trace, Ionic Fulvic Acid, 2 fl oz (59 ml)
Trace, Ionic Fulvic Acid, 2 fl oz (59 ml)
Trace
15 mg5919.990.226View on iHerb →
14
Trace, Ionic Copper, 2 fl oz (59 ml)
Trace, Ionic Copper, 2 fl oz (59 ml)
Trace
15 mg4819.990.278View on iHerb →
15
Trace, Liquid Glucosamine/Chondroitin/MSM, Blueberry, 30 fl oz (887 ml)
Trace, Liquid Glucosamine/Chondroitin/MSM, Blueberry, 30 fl oz (887 ml)
Trace
30 mg3061.990.689View on iHerb →
16
Trace, Fiber, Orange Tangerine, 15 fl oz (444 ml)
Trace, Fiber, Orange Tangerine, 15 fl oz (444 ml)
Trace
20 mg1527.990.933View on iHerb →
17
Trace, Liquid Immunity+, Mixed Berry, 30 fl oz (887 ml)
Trace, Liquid Immunity+, Mixed Berry, 30 fl oz (887 ml)
Trace
10 mg3027.990.933View on iHerb →
18
Trace, Ionic Calcium, 2 fl oz (59 ml)
Trace, Ionic Calcium, 2 fl oz (59 ml)
Trace
4 mg4819.991.04View on iHerb →
19
Trace, Ionic B12, Grape, 2 fl oz (59 ml)
Trace, Ionic B12, Grape, 2 fl oz (59 ml)
Trace
3 mg5919.991.13View on iHerb →
20
Trace, Post-Workout, Recovery Powder, Strawberry Lemonade, 10.8 oz (306 g)
Trace, Post-Workout, Recovery Powder, Strawberry Lemonade, 10.8 oz (306 g)
Trace
15 mg2057.991.93View on iHerb →
21
Trace, Ionic Chlorophyll, 2 fl oz (59 mL)
Trace, Ionic Chlorophyll, 2 fl oz (59 mL)
Trace
5 mg2327.992.43View on iHerb →

How we rank Magnesium (CTM)

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.