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Cheapest Magnesium (Aspartate) on iHerb

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

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

The priciest option here costs about 11.4× more per 100 mg of Magnesium (Aspartate) 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 Aspartate with B6, 90 Vegetarian Capsules
Vitamatic, Magnesium Aspartate with B6, 90 Vegetarian Capsules
Vitamatic
1,335 mg459.990.017View on iHerb →
2
Solaray, Magnesium Asporotate™, 180 VegCaps (200 mg per Capsule)
Solaray, Magnesium Asporotate™, 180 VegCaps (200 mg per Capsule)
Solaray
400 mg9020.790.058View on iHerb →
3
Solaray, Magnesium Asporotate™, 120 VegCaps (200 mg per Capsule)
Solaray, Magnesium Asporotate™, 120 VegCaps (200 mg per Capsule)
Solaray
400 mg6014.990.063View on iHerb →
4
NOW Foods, Calcium Citrate, 250 Tablets
NOW Foods, Calcium Citrate, 250 Tablets
NOW Foods
300 mg12525.720.069View on iHerb →
5
Solaray, Magnesium Asporotate™, 60 VegCaps (200 mg per Capsule)
Solaray, Magnesium Asporotate™, 60 VegCaps (200 mg per Capsule)
Solaray
400 mg308.490.071View on iHerb →
6
Force Factor, Fundamentals, Zinc Magnesium Aspartate, 60 Tablets
Force Factor, Fundamentals, Zinc Magnesium Aspartate, 60 Tablets
Force Factor
450 mg3010.990.081View on iHerb →
7
NOW Foods, Calcium Citrate , 100 Tablets
NOW Foods, Calcium Citrate , 100 Tablets
NOW Foods
300 mg5012.240.082View on iHerb →
8
Bluebonnet Nutrition, Magnesium Aspartate, 100 Vegetable Capsules (200 mg per Capsule)
Bluebonnet Nutrition, Magnesium Aspartate, 100 Vegetable Capsules (200 mg per Capsule)
Bluebonnet Nutrition
400 mg5017.560.088View on iHerb →
9
Source Naturals, Wellness ZincMunity™, 60 Vegetarian Capsules
Source Naturals, Wellness ZincMunity™, 60 Vegetarian Capsules
Source Naturals
75 mg302.000.089View on iHerb →
10
NOW Foods, Magnesium & Potassium Aspartate With Taurine, 120 Veg Capsules
NOW Foods, Magnesium & Potassium Aspartate With Taurine, 120 Veg Capsules
NOW Foods
250 mg6013.460.090View on iHerb →
11
Country Life, Cal-Snack, Chewable Calcium Magnesium, Vanilla Orange, 120 Wafers
Country Life, Cal-Snack, Chewable Calcium Magnesium, Vanilla Orange, 120 Wafers
Country Life
500 mg6031.490.105View on iHerb →
12
GAT, ZMAG-T, 90 Veg Capsules
GAT, ZMAG-T, 90 Veg Capsules
GAT
450 mg3014.990.111View on iHerb →
13
Nature's Way, Prenatal Multivitamin, 180 Capsules
Nature's Way, Prenatal Multivitamin, 180 Capsules
Nature's Way
125 mg9013.940.124View on iHerb →
14
Bluebonnet Nutrition, Calcium Magnesium 1:1 Ratio, 180 Vegetable Capsules
Bluebonnet Nutrition, Calcium Magnesium 1:1 Ratio, 180 Vegetable Capsules
Bluebonnet Nutrition
250 mg9030.360.135View on iHerb →
15
Country Life, Cal-Snack, Chewable Calcium Magnesium, Vanilla Orange, 60 Wafers
Country Life, Cal-Snack, Chewable Calcium Magnesium, Vanilla Orange, 60 Wafers
Country Life
500 mg3021.690.145View on iHerb →
16
NOW Foods, Sports, ZMA®, 90 Veg Capsules
NOW Foods, Sports, ZMA®, 90 Veg Capsules
NOW Foods
450 mg3019.590.145View on iHerb →
17
Bluebonnet Nutrition, Calcium Magnesium Potassium, 180 Caplets
Bluebonnet Nutrition, Calcium Magnesium Potassium, 180 Caplets
Bluebonnet Nutrition
400 mg4526.360.146View on iHerb →
18
Bluebonnet Nutrition, Calcium Citrate & Magnesium, 180 Caplets
Bluebonnet Nutrition, Calcium Citrate & Magnesium, 180 Caplets
Bluebonnet Nutrition
400 mg4526.360.146View on iHerb →
19
ALLMAX, TestoFX Sport, Testosterone Support Formula, 80 Capsules
ALLMAX, TestoFX Sport, Testosterone Support Formula, 80 Capsules
ALLMAX
450 mg2013.490.150View on iHerb →
20
Zahler, PowerCal, 120 Capsules
Zahler, PowerCal, 120 Capsules
Zahler
500 mg3022.720.152View on iHerb →
21
BodyTech, ZMA Tech, 180 Capsules
BodyTech, ZMA Tech, 180 Capsules
BodyTech
450 mg6041.390.153View on iHerb →
22
Bluebonnet Nutrition, Calcium Citrate Magnesium Vitamin D3, 90 Caplets
Bluebonnet Nutrition, Calcium Citrate Magnesium Vitamin D3, 90 Caplets
Bluebonnet Nutrition
400 mg2215.600.177View on iHerb →
23
True Athlete, ZMA® With Theanine, 180 Capsules
True Athlete, ZMA® With Theanine, 180 Capsules
True Athlete
450 mg6047.990.178View on iHerb →
24
Solaray, 2:1 Ratio Cal-Mag Asporotates™, 240 Capsules
Solaray, 2:1 Ratio Cal-Mag Asporotates™, 240 Capsules
Solaray
250 mg6027.490.183View on iHerb →
25
Solaray, Cal-Mag Asporotates™, Advanced Chelate Complex, 120 Capsules
Solaray, Cal-Mag Asporotates™, Advanced Chelate Complex, 120 Capsules
Solaray
250 mg3014.190.189View on iHerb →

How we rank Magnesium (Aspartate)

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.