BestPicks

Best Magnesium Supplement on iHerb (2026): 10 Best Sellers Compared by Label

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If you are searching for the best magnesium supplement on iHerb, this page does not pick a winner. It lines up 10 magnesium products from iHerb's US store (Magnesium category, Best sellers sort), including several magnesium glycinate and bisglycinate products, and copies what the label says: the Supplement Facts amount and %Daily Value per serving, the form (tablet or capsule), how many units make a serving, servings per container, other ingredients and label cautions, plus the US price we saw on 2026-11-04. Products come from the front of the Best sellers list; the same product in different pack sizes is merged, and no more than 3 products per brand are included. We have not tested any product, we make no health claims, and the order is not a quality ranking. Supplements do not replace medical care.

How to choose

Quick summary

  1. 1. Doctor's Best Magnesium Lysinate Glycinate Chelate, 240 Tablets (100 mg per Tablet)US$23.99 on iHerb USA tablet with 200 mg magnesium per 2-tablet serving and 120 servings per bottle, listed with a lysinate glycinate chelate source.
  2. 2. NOW Foods Magnesium Glycinate, 180 Tablets (100 mg per Tablet)US$19.59 on iHerb USA tablet with 200 mg magnesium per 2-tablet serving from magnesium bisglycinate, 90 servings per bottle.
  3. 3. Life Extension Magnesium L-Threonate, 90 Vegetarian Capsules (48 mg per Capsule)US$31.50 on iHerb USA vegetarian capsule listed as magnesium L-threonate, 144 mg magnesium per 3-capsule serving and 30 servings per bottle.
  4. 4. California Gold Nutrition Magnesium Bisglycinate Chelate, 240 Veggie Capsules (100 mg per Capsule)US$25.58 on iHerb USA veggie capsule with 200 mg magnesium per 2-capsule serving, 120 servings per bottle, from bisglycinate chelate plus magnesium oxide.
  5. 5. Thorne Magnesium Glycinate, 90 Capsules (120 mg per Capsule)US$26.00 on iHerb USA one-capsule serving with 120 mg magnesium (29% DV) from magnesium glycinate and 90 servings per bottle.
  6. 6. Life Extension Magnesium Caps, 500 mg, 100 Vegetarian CapsulesUS$9.00 on iHerb USA one-capsule serving with 500 mg magnesium (119% DV) from oxide, citrate and succinate; 100 servings per bottle.
  7. 7. Solaray Magnesium Glycinate, 120 VegCapsUS$18.39 on iHerb USA four-VegCap serving with 350 mg magnesium (83% DV) from magnesium bisglycinate, 30 servings per bottle, plus BioPerine on the label.
  8. 8. Swanson Vitamins Magnesium Glycinate, 133 mg, 90 Vegan CapsulesUS$11.09 on iHerb USA one-capsule serving with 133 mg magnesium (32% DV), a vegan capsule and 90 servings per bottle, from a buffered bisglycinate chelate plus oxide.
  9. 9. NOW Foods Magnesium Citrate, 120 Veg Capsules (133 mg per Capsule)US$13.46 on iHerb USA three-capsule serving with 400 mg magnesium (95% DV) from magnesium citrate, 40 servings per bottle.
  10. 10. Source Naturals Ultra-Mag, 120 TabletsUS$15.39 on iHerb USA two-tablet serving with 420 mg magnesium (100% DV) from several forms, plus vitamin B-6; 60 servings per bottle.

Products

1. Doctor's Best Magnesium Lysinate Glycinate Chelate, 240 Tablets (100 mg per Tablet) (Doctor's Best)

Price: US$23.99 on iHerb US (checked 2026-11-04); iHerb shows US$0.20/serving. Prices and promotions differ by country, so the checkout page is final

Form
Tablet
Serving size
2 tablets
Servings per container
120
Elemental magnesium per serving
200 mg, 48% DV
Magnesium source on label
Magnesium lysinate glycinate chelate (2,000 mg); label states Albion
Suggested use on label
Label suggests 2 tablets twice daily, or as recommended by a nutritionally informed physician
Other ingredients
Microcrystalline cellulose, croscarmellose sodium, magnesium stearate (vegetable source), stearic acid, hydroxypropyl cellulose, silicon dioxide, hypromellose
Label cautions
Label says to store in a cool, dry place. Keep out of reach of children.
iHerb listing
Product code DRB-00087; first listed on iHerb 04/2009; iHerb shows 218,326 reviews (a count, not a quality measure)
Pros
  • Label names the source as a lysinate glycinate chelate and states Albion
Cons
  • 2 tablets per serving

Best for: A tablet with 200 mg magnesium per 2-tablet serving and 120 servings per bottle, listed with a lysinate glycinate chelate source. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

2. NOW Foods Magnesium Glycinate, 180 Tablets (100 mg per Tablet) (NOW Foods)

Price: US$19.59 on iHerb US (checked 2026-11-04); iHerb shows US$0.22/serving. Prices and promotions differ by country, so the checkout page is final

Form
Tablet
Serving size
2 tablets
Servings per container
90
Elemental magnesium per serving
200 mg, 48% DV
Magnesium source on label
Magnesium bisglycinate (2,000 mg); label states Albion
Suggested use on label
Label suggests 2 tablets 1 to 2 times daily with food
Other ingredients
Citric acid, hydroxypropyl cellulose, stearic acid (vegetable source), silicon dioxide, vegetarian coating (hypromellose, stearic acid, sunflower lecithin, triethyl citrate, sunflower oil)
Label cautions
For adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.
iHerb listing
Product code NOW-01289; first listed on iHerb 03/2019; iHerb shows 46,382 reviews (a count, not a quality measure)
Pros
  • Label states a vegetarian coating and Albion
Cons
  • 2 tablets per serving

Best for: A tablet with 200 mg magnesium per 2-tablet serving from magnesium bisglycinate, 90 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

3. Life Extension Magnesium L-Threonate, 90 Vegetarian Capsules (48 mg per Capsule) (Life Extension)

Price: US$31.50 on iHerb US (checked 2026-11-04); iHerb shows US$1.05/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (vegetarian)
Serving size
3 vegetarian capsules
Servings per container
30
Elemental magnesium per serving
144 mg, 34% DV
Magnesium source on label
Magnesium L-threonate (2,000 mg); label states Magtein
Suggested use on label
Label suggests 3 capsules daily, or as recommended by a healthcare practitioner
Other ingredients
Vegetable cellulose capsule, microcrystalline cellulose, stearic acid, vegetable stearate, silica
Label cautions
Do not exceed the recommended dose; keep out of reach of children; label says to consult a physician if under treatment for a medical condition or pregnant or lactating; do not purchase if the outer seal is damaged.
iHerb listing
Product code LEX-16039; first listed on iHerb 12/2011; iHerb shows 36,637 reviews (a count, not a quality measure)
Pros
  • Vegetarian capsule
Cons
  • 3 capsules per serving
  • iHerb shows US$1.05/serving
  • 30 servings per container

Best for: A vegetarian capsule listed as magnesium L-threonate, 144 mg magnesium per 3-capsule serving and 30 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

4. California Gold Nutrition Magnesium Bisglycinate Chelate, 240 Veggie Capsules (100 mg per Capsule) (California Gold Nutrition)

Price: US$25.58 on iHerb US (checked 2026-11-04); iHerb shows US$0.21/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (veggie)
Serving size
2 capsules
Servings per container
120
Elemental magnesium per serving
200 mg, 48% DV
Magnesium source on label
Magnesium bisglycinate chelate and magnesium oxide; label states TRAACS (Albion)
Suggested use on label
Label suggests 2 capsules daily, with food
Other ingredients
Hypromellose veggie capsule, magnesium stearate, microcrystalline cellulose, silicon dioxide
Label cautions
Keep out of reach of children; label says pregnant or lactating women, people under 18, those taking prescription medications and those with a medical condition should consult a healthcare professional first; do not use if the seal is missing or broken.
iHerb listing
Product code CGN-01902; first listed on iHerb 04/2021; iHerb shows 29,599 reviews (a count, not a quality measure)
Pros
  • Veggie capsule
Cons
  • 2 capsules per serving
  • Magnesium oxide is listed alongside the bisglycinate chelate

Best for: A veggie capsule with 200 mg magnesium per 2-capsule serving, 120 servings per bottle, from bisglycinate chelate plus magnesium oxide. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

5. Thorne Magnesium Glycinate, 90 Capsules (120 mg per Capsule) (Thorne)

Price: US$26.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.29/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule
Serving size
1 capsule
Servings per container
90
Elemental magnesium per serving
120 mg, 29% DV
Magnesium source on label
Magnesium glycinate
Suggested use on label
Label suggests 1 capsule one to four times daily, or as recommended by a health-care practitioner
Other ingredients
Hypromellose capsule, medium chain triglyceride oil, silicon dioxide
Label cautions
Use only if the bottle is sealed; label says if pregnant, consult your health-care practitioner before use.
iHerb listing
Product code THR-01533; first listed on iHerb 07/2025; iHerb shows 1,971 reviews (a count, not a quality measure)
Pros
  • One capsule per serving
  • Single magnesium source listed (glycinate)
Cons
  • 120 mg magnesium per capsule (29% DV), so a higher amount means more than one capsule

Best for: A one-capsule serving with 120 mg magnesium (29% DV) from magnesium glycinate and 90 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

6. Life Extension Magnesium Caps, 500 mg, 100 Vegetarian Capsules (Life Extension)

Price: US$9.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.09/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (vegetarian)
Serving size
1 vegetarian capsule
Servings per container
100
Elemental magnesium per serving
500 mg, 119% DV
Magnesium source on label
Magnesium oxide, citrate and succinate
Suggested use on label
Label suggests 1 capsule, one to three times daily, or as recommended by a healthcare practitioner
Other ingredients
Vegetable cellulose capsule, microcrystalline cellulose, stearic acid, silica
Label cautions
The label includes a caution about high doses (see label); do not exceed the recommended dose; keep out of reach of children; label says to consult a physician if under treatment for a medical condition or pregnant or lactating.
iHerb listing
Product code LEX-14591; first listed on iHerb 03/2013; iHerb shows 63,136 reviews (a count, not a quality measure)
Pros
  • One capsule per serving
  • Vegetarian capsule
  • 500 mg magnesium per capsule (119% DV)
  • iHerb shows US$0.09/serving
Cons
  • Glycinate is not among the listed sources

Best for: A one-capsule serving with 500 mg magnesium (119% DV) from oxide, citrate and succinate; 100 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

7. Solaray Magnesium Glycinate, 120 VegCaps (Solaray)

Price: US$18.39 on iHerb US (checked 2026-11-04); iHerb shows US$0.61/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (VegCap)
Serving size
4 VegCaps
Servings per container
30
Elemental magnesium per serving
350 mg, 83% DV
Magnesium source on label
Magnesium bisglycinate; the label also lists BioPerine black pepper extract (5 mg) and 10 calories per serving
Suggested use on label
Label suggests 4 VegCaps daily with a meal or glass of water
Other ingredients
Vegetable cellulose capsule, magnesium stearate, cellulose, silica
Label cautions
Keep out of reach of children; label says to keep your licensed health care practitioner informed when using this product; do not use if the safety seal is broken or missing.
iHerb listing
Product code SOR-54901; first listed on iHerb 02/2022; iHerb shows 63,102 reviews (a count, not a quality measure)
Pros
  • 350 mg magnesium per serving (83% DV) from bisglycinate
Cons
  • 4 VegCaps per serving
  • Also contains BioPerine black pepper extract
  • iHerb shows US$0.61/serving
  • 30 servings per container

Best for: A four-VegCap serving with 350 mg magnesium (83% DV) from magnesium bisglycinate, 30 servings per bottle, plus BioPerine on the label. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

8. Swanson Vitamins Magnesium Glycinate, 133 mg, 90 Vegan Capsules (Swanson Vitamins)

Price: US$11.09 on iHerb US (checked 2026-11-04); iHerb shows US$0.12/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (vegan)
Serving size
1 vegan capsule
Servings per container
90
Elemental magnesium per serving
133 mg, 32% DV
Magnesium source on label
Albion magnesium bisglycinate chelate (buffered) and magnesium oxide
Suggested use on label
Label suggests 1 capsule three times per day with water
Other ingredients
Vegan capsule (hypromellose), citric acid, silica, maltodextrin, microcrystalline cellulose, magnesium stearate
Label cautions
For adults only; label says to consult a healthcare provider if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children; do not use if the seal is broken.
iHerb listing
Product code SWV-02073; first listed on iHerb 02/2023; iHerb shows 14,275 reviews (a count, not a quality measure)
Pros
  • One capsule per serving
  • Vegan capsule
  • Label states Albion
  • iHerb shows US$0.12/serving
Cons
  • Magnesium oxide is listed alongside the bisglycinate chelate

Best for: A one-capsule serving with 133 mg magnesium (32% DV), a vegan capsule and 90 servings per bottle, from a buffered bisglycinate chelate plus oxide. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

9. NOW Foods Magnesium Citrate, 120 Veg Capsules (133 mg per Capsule) (NOW Foods)

Price: US$13.46 on iHerb US (checked 2026-11-04); iHerb shows US$0.34/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (veg)
Serving size
3 veg capsules
Servings per container
40
Elemental magnesium per serving
400 mg, 95% DV
Magnesium source on label
Magnesium citrate (2,667 mg)
Suggested use on label
Label suggests 3 capsules daily, preferably in divided doses, with food
Other ingredients
Hypromellose capsule, ascorbyl palmitate, silicon dioxide
Label cautions
For adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.
iHerb listing
Product code NOW-01294; first listed on iHerb 05/2007; iHerb shows 71,062 reviews (a count, not a quality measure)
Pros
  • 400 mg magnesium per serving (95% DV) from a single citrate source
Cons
  • 3 capsules per serving

Best for: A three-capsule serving with 400 mg magnesium (95% DV) from magnesium citrate, 40 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

10. Source Naturals Ultra-Mag, 120 Tablets (Source Naturals)

Price: US$15.39 on iHerb US (checked 2026-11-04); iHerb shows US$0.26/serving. Prices and promotions differ by country, so the checkout page is final

Form
Tablet
Serving size
2 tablets
Servings per container
60
Elemental magnesium per serving
420 mg, 100% DV
Magnesium source on label
Magnesium citrate, succinate complex, glycinate, malate and taurinate complex; the label also lists vitamin B-6 (30 mg, 1,765% DV), sodium 30 mg and 10 calories per serving
Suggested use on label
Label suggests 1 or 2 tablets daily with a meal
Other ingredients
Modified cellulose gum, stearic acid, hydroxypropyl cellulose, acacia gum, magnesium stearate, silica
Label cautions
Label says if pregnant, may become pregnant or breastfeeding, consult your health care professional; keep out of reach of children; do not use if a tamper-evident seal is broken or missing.
iHerb listing
Product code SNS-00803; first listed on iHerb 05/2007; iHerb shows 56,149 reviews (a count, not a quality measure)
Pros
  • Label lists five magnesium forms in one product
Cons
  • 2 tablets per serving
  • Also contains vitamin B-6 at 1,765% DV per serving

Best for: A two-tablet serving with 420 mg magnesium (100% DV) from several forms, plus vitamin B-6; 60 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

Comparison table

ProductBrandFormServing sizeServings per containerElemental magnesium per servingMagnesium source on labelSuggested use on labelOther ingredientsLabel cautionsiHerb listingPrice
Doctor's Best Magnesium Lysinate Glycinate Chelate, 240 Tablets (100 mg per Tablet)Doctor's BestTablet2 tablets120200 mg, 48% DVMagnesium lysinate glycinate chelate (2,000 mg); label states AlbionLabel suggests 2 tablets twice daily, or as recommended by a nutritionally informed physicianMicrocrystalline cellulose, croscarmellose sodium, magnesium stearate (vegetable source), stearic acid, hydroxypropyl cellulose, silicon dioxide, hypromelloseLabel says to store in a cool, dry place. Keep out of reach of children.Product code DRB-00087; first listed on iHerb 04/2009; iHerb shows 218,326 reviews (a count, not a quality measure)US$23.99 on iHerb US (checked 2026-11-04); iHerb shows US$0.20/serving. Prices and promotions differ by country, so the checkout page is final
NOW Foods Magnesium Glycinate, 180 Tablets (100 mg per Tablet)NOW FoodsTablet2 tablets90200 mg, 48% DVMagnesium bisglycinate (2,000 mg); label states AlbionLabel suggests 2 tablets 1 to 2 times daily with foodCitric acid, hydroxypropyl cellulose, stearic acid (vegetable source), silicon dioxide, vegetarian coating (hypromellose, stearic acid, sunflower lecithin, triethyl citrate, sunflower oil)For adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.Product code NOW-01289; first listed on iHerb 03/2019; iHerb shows 46,382 reviews (a count, not a quality measure)US$19.59 on iHerb US (checked 2026-11-04); iHerb shows US$0.22/serving. Prices and promotions differ by country, so the checkout page is final
Life Extension Magnesium L-Threonate, 90 Vegetarian Capsules (48 mg per Capsule)Life ExtensionCapsule (vegetarian)3 vegetarian capsules30144 mg, 34% DVMagnesium L-threonate (2,000 mg); label states MagteinLabel suggests 3 capsules daily, or as recommended by a healthcare practitionerVegetable cellulose capsule, microcrystalline cellulose, stearic acid, vegetable stearate, silicaDo not exceed the recommended dose; keep out of reach of children; label says to consult a physician if under treatment for a medical condition or pregnant or lactating; do not purchase if the outer seal is damaged.Product code LEX-16039; first listed on iHerb 12/2011; iHerb shows 36,637 reviews (a count, not a quality measure)US$31.50 on iHerb US (checked 2026-11-04); iHerb shows US$1.05/serving. Prices and promotions differ by country, so the checkout page is final
California Gold Nutrition Magnesium Bisglycinate Chelate, 240 Veggie Capsules (100 mg per Capsule)California Gold NutritionCapsule (veggie)2 capsules120200 mg, 48% DVMagnesium bisglycinate chelate and magnesium oxide; label states TRAACS (Albion)Label suggests 2 capsules daily, with foodHypromellose veggie capsule, magnesium stearate, microcrystalline cellulose, silicon dioxideKeep out of reach of children; label says pregnant or lactating women, people under 18, those taking prescription medications and those with a medical condition should consult a healthcare professional first; do not use if the seal is missing or broken.Product code CGN-01902; first listed on iHerb 04/2021; iHerb shows 29,599 reviews (a count, not a quality measure)US$25.58 on iHerb US (checked 2026-11-04); iHerb shows US$0.21/serving. Prices and promotions differ by country, so the checkout page is final
Thorne Magnesium Glycinate, 90 Capsules (120 mg per Capsule)ThorneCapsule1 capsule90120 mg, 29% DVMagnesium glycinateLabel suggests 1 capsule one to four times daily, or as recommended by a health-care practitionerHypromellose capsule, medium chain triglyceride oil, silicon dioxideUse only if the bottle is sealed; label says if pregnant, consult your health-care practitioner before use.Product code THR-01533; first listed on iHerb 07/2025; iHerb shows 1,971 reviews (a count, not a quality measure)US$26.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.29/serving. Prices and promotions differ by country, so the checkout page is final
Life Extension Magnesium Caps, 500 mg, 100 Vegetarian CapsulesLife ExtensionCapsule (vegetarian)1 vegetarian capsule100500 mg, 119% DVMagnesium oxide, citrate and succinateLabel suggests 1 capsule, one to three times daily, or as recommended by a healthcare practitionerVegetable cellulose capsule, microcrystalline cellulose, stearic acid, silicaThe label includes a caution about high doses (see label); do not exceed the recommended dose; keep out of reach of children; label says to consult a physician if under treatment for a medical condition or pregnant or lactating.Product code LEX-14591; first listed on iHerb 03/2013; iHerb shows 63,136 reviews (a count, not a quality measure)US$9.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.09/serving. Prices and promotions differ by country, so the checkout page is final
Solaray Magnesium Glycinate, 120 VegCapsSolarayCapsule (VegCap)4 VegCaps30350 mg, 83% DVMagnesium bisglycinate; the label also lists BioPerine black pepper extract (5 mg) and 10 calories per servingLabel suggests 4 VegCaps daily with a meal or glass of waterVegetable cellulose capsule, magnesium stearate, cellulose, silicaKeep out of reach of children; label says to keep your licensed health care practitioner informed when using this product; do not use if the safety seal is broken or missing.Product code SOR-54901; first listed on iHerb 02/2022; iHerb shows 63,102 reviews (a count, not a quality measure)US$18.39 on iHerb US (checked 2026-11-04); iHerb shows US$0.61/serving. Prices and promotions differ by country, so the checkout page is final
Swanson Vitamins Magnesium Glycinate, 133 mg, 90 Vegan CapsulesSwanson VitaminsCapsule (vegan)1 vegan capsule90133 mg, 32% DVAlbion magnesium bisglycinate chelate (buffered) and magnesium oxideLabel suggests 1 capsule three times per day with waterVegan capsule (hypromellose), citric acid, silica, maltodextrin, microcrystalline cellulose, magnesium stearateFor adults only; label says to consult a healthcare provider if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children; do not use if the seal is broken.Product code SWV-02073; first listed on iHerb 02/2023; iHerb shows 14,275 reviews (a count, not a quality measure)US$11.09 on iHerb US (checked 2026-11-04); iHerb shows US$0.12/serving. Prices and promotions differ by country, so the checkout page is final
NOW Foods Magnesium Citrate, 120 Veg Capsules (133 mg per Capsule)NOW FoodsCapsule (veg)3 veg capsules40400 mg, 95% DVMagnesium citrate (2,667 mg)Label suggests 3 capsules daily, preferably in divided doses, with foodHypromellose capsule, ascorbyl palmitate, silicon dioxideFor adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.Product code NOW-01294; first listed on iHerb 05/2007; iHerb shows 71,062 reviews (a count, not a quality measure)US$13.46 on iHerb US (checked 2026-11-04); iHerb shows US$0.34/serving. Prices and promotions differ by country, so the checkout page is final
Source Naturals Ultra-Mag, 120 TabletsSource NaturalsTablet2 tablets60420 mg, 100% DVMagnesium citrate, succinate complex, glycinate, malate and taurinate complex; the label also lists vitamin B-6 (30 mg, 1,765% DV), sodium 30 mg and 10 calories per servingLabel suggests 1 or 2 tablets daily with a mealModified cellulose gum, stearic acid, hydroxypropyl cellulose, acacia gum, magnesium stearate, silicaLabel says if pregnant, may become pregnant or breastfeeding, consult your health care professional; keep out of reach of children; do not use if a tamper-evident seal is broken or missing.Product code SNS-00803; first listed on iHerb 05/2007; iHerb shows 56,149 reviews (a count, not a quality measure)US$15.39 on iHerb US (checked 2026-11-04); iHerb shows US$0.26/serving. Prices and promotions differ by country, so the checkout page is final

Buying criteria

FAQ

Is this a ranking of the best magnesium supplement?

No. The order follows iHerb US's Best sellers list for the category on 2026-11-04. We have not tested the products and do not say which one is better.

Which of these list magnesium glycinate?

Doctor's Best, NOW Foods Magnesium Glycinate, California Gold Nutrition, Thorne, Solaray, Swanson and Source Naturals list glycinate or bisglycinate on the label. Check each product's "Magnesium source on label" line for the exact wording.

Why might the price on iHerb differ from this page?

We show iHerb US prices in USD as read on 2026-11-04. iHerb prices and promotions differ by country and change over time, so go by the price on the checkout page.

Why is the number of servings not the same as the number of capsules?

Because a serving can be more than one unit. For example, a 240-tablet bottle with 2 tablets per serving has 120 servings.

Can I take these with medication or during pregnancy?

This page cannot answer that. Several labels advise asking a doctor if you are pregnant, nursing or taking medication, so ask a doctor or pharmacist before use.