Nutricost Magnesium Oxide 500mg
by Nutricost
"240 capsules of magnesium oxide at 500mg — the budget magnesium option providing 300mg elemental magnesium per capsule"
Overview
Nutricost Magnesium Oxide provides 500mg of magnesium oxide per capsule, yielding approximately 300mg of elemental magnesium. Magnesium oxide has the highest percentage of elemental magnesium by weight (60%) of any magnesium form, though its bioavailability is lower than chelated forms like glycinate or citrate. At 240 capsules for under $14, it's one of the most affordable magnesium supplements available. Nutricost is known for their no-frills, lab-tested supplements at bulk prices.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Magnesium (as Magnesium Oxide) | 500 mg (300 mg elemental) |
Pros & Cons
What We Like
- 240 capsules (8-month supply)
- Under $14
- 300mg elemental magnesium
- 20,000+ reviews
- One capsule per serving
What Could Be Better
- Magnesium oxide (lower bioavailability)
- May cause GI distress/laxative effect
- Not ideal for sleep/relaxation
- Basic form
Who Is This For?
Best For
- Budget magnesium supplementation
- Those wanting high elemental magnesium
- Constipation relief (side benefit)
- Long-term supply seekers
Not Ideal For
- Those wanting best absorption
- Those with GI sensitivity
- Those wanting sleep/relaxation benefits
- Those wanting chelated forms
Our Verdict
Nutricost Magnesium Oxide is the budget workhorse — 240 capsules under $14 with 300mg elemental magnesium. The oxide form has lower bioavailability than glycinate, but the high elemental content and rock-bottom price make it a solid choice for basic magnesium needs.