Health Stack Guide

Magnesium Glycinate 400mg vs 500mg: Choose the Right Capsule Formula

Choose between a 400mg magnesium glycinate capsule with vitamins B6 and D3 or a 500mg magnesium glycinate capsule with a larger 240-capsule count.

Last updated Jul 28, 2026

Sleep stress supplements can look very similar at first glance, but the choice here comes down to formula, capsule count, and listed price. The 400mg option combines magnesium glycinate with vitamins B6 and D3, while the 500mg option focuses on magnesium glycinate and comes in a larger bottle. Pick based on whether you prefer the added vitamins or a higher stated dosage and more capsules.

Quick verdict

Choose Magnesium Glycinate 400mg - 120 Capsules For Sleep, Stress Relief Support Bone when the lower listed price and the inclusion of vitamin B6 and vitamin D3 matter most. At USD 12.66, it is the lower-priced choice in this comparison.

Choose Magnesium Glycinate 500mg 240 Capsules Sleep Stress Relief Bone Muscle Support when you want the larger 240-capsule count and a stated 500mg dosage. Its listed price is USD 16.98, a USD 4.32 difference from the 400mg bottle.

At-a-glance comparison

DetailMagnesium Glycinate 400mg - 120 CapsulesMagnesium Glycinate 500mg 240 Capsules
Listed priceUSD 12.66USD 16.98
Stated dosage400 mg500 mg
Capsule count120 capsules240 capsules
Formula focusMagnesium, magnesium glycinate, vitamin B6, vitamin D3Magnesium glycinate
Shared attributesGluten-free, non-GMO, allergen-freeGluten-free, non-GMO, allergen-free

Where each magnesium glycinate option wins

The 400mg, 120-capsule formula wins on a broader ingredient mix. Magnesium glycinate is paired with vitamin B6 and vitamin D3, making it the more suitable pick for shoppers who specifically want those ingredients included in the capsule formula. Its USD 12.66 listed price also makes it the lower entry price of the pair.

The 500mg, 240-capsule formula wins on bottle count and stated dosage. With 240 capsules and 500mg in the title and dosage details, it suits shoppers prioritizing a larger capsule quantity. Its feature list also includes dairy-free, gelatin-free, caffeine-free, fish-free, egg-free, and wheat-free attributes.

Product notes

Magnesium Glycinate 400mg - 120 Capsules For Sleep, Stress Relief Support Bone

This choice is best for someone looking for magnesium glycinate alongside vitamin B6 and vitamin D3 rather than magnesium glycinate alone. The capsule format, neutral flavor, and stated gluten-free, non-GMO, allergen-free attributes keep the focus on a straightforward supplement format. At USD 12.66, it is also the lower-priced option for shoppers comparing the two bottles directly. The main limitation is its 120-capsule count, which is half the count named for the 500mg alternative. Its stated 400mg dosage is also lower than the other option's 500mg amount, so it is the clearer match when the added B6 and D3 are more important than choosing the higher stated dosage.

Magnesium Glycinate 500mg 240 Capsules Sleep Stress Relief Bone Muscle Support

Pick this bottle when a larger 240-capsule quantity is the deciding factor. It has a single-ingredient focus on magnesium glycinate, with a stated 500mg dosage, and its capsule attributes include easy to swallow, dairy-free, gluten-free, gelatin-free, caffeine-free, and non-GMO. That makes it a focused alternative for shoppers who prefer magnesium glycinate without the vitamin B6 and D3 included in the 400mg formula. The tradeoff is the USD 16.98 listed price, which is higher than the 400mg bottle. It also does not offer the added vitamin B6 and vitamin D3 named in the other formula, so it is less aligned with shoppers seeking those ingredients together.

Final choice by use case

  • Choose the 400mg magnesium glycinate capsules for the lower listed price and a formula that includes vitamin B6 and vitamin D3.
  • Choose the 500mg magnesium glycinate capsules for the 240-capsule bottle, 500mg stated dosage, and magnesium-glycinate-only formula.
  • For a simple tie-breaker: prioritize formula additions with the 400mg option, or prioritize capsule count with the 500mg option.
Products in this article
Magnesium Glycinate 400mgUSD 12.66View on eBayMagnesium Glycinate 500mg 240 Capsules Sleep Stress Relief Bone Muscle SupportUSD 16.98View on eBay
Magnesium Glycinate 400mgUSD 12.66View on eBayMagnesium Glycinate 500mg 240 Capsules Sleep Stress Relief Bone Muscle SupportUSD 16.98View on eBay