Magnesium Glycinate
vs Citrate.

Glycinate and citrate are the two most popular forms of magnesium supplement — and the most common comparison people make when choosing. Here's an honest breakdown of both, what they're each best for, and why the answer might be "both."

If you've spent any time researching magnesium supplements, you'll have encountered this question. Glycinate versus citrate. Two well-regarded forms, both significantly better absorbed than the cheap oxide form, both with solid reputations — but different enough to matter depending on what you're trying to achieve.

Magnesium Glycinate

Magnesium glycinate is magnesium chelated to the amino acid glycine. This bonding dramatically improves absorption — glycine acts as a carrier molecule that escorts the magnesium through the intestinal wall more efficiently than the mineral alone. It's the most bioavailable oral form of magnesium.

Glycinate is also the gentlest on the digestive system. Because it's so efficiently absorbed, very little reaches the colon — where unabsorbed magnesium draws water and causes the laxative effect that higher doses of other forms can produce. For people with sensitive digestion, or those who've experienced stomach issues with other magnesium forms, glycinate is typically the answer.

The primary benefits associated with magnesium glycinate are sleep improvement, anxiety reduction, nervous system support, and muscle relaxation. These are driven by both the magnesium content and glycine's own calming properties.

Magnesium Citrate

Magnesium citrate is magnesium bonded to citric acid. It's very well absorbed — significantly better than oxide — and has been the "go-to" recommendation for magnesium supplementation for many years. It's also widely available and relatively affordable.

Magnesium citrate has a mild laxative effect at higher doses, which is sometimes the point — it's used therapeutically for constipation. At lower supplement doses this effect is typically mild, but for people who are already prone to loose stools, glycinate is preferable.

Citrate supports overall mineral absorption and digestive health, and contributes meaningfully to addressing general magnesium deficiency. It's a solid, well-studied form that works reliably for most people.

Why Not Both?

This is actually the most sensible answer — and it's the approach the Nutrition Geeks 3-in-1 formula takes. By combining glycinate (1000mg), malate (400mg), and citrate (400mg) in a single capsule, you get the superior absorption and sleep/calm benefits of glycinate alongside the digestive support and overall bioavailability of citrate, plus the energy-supporting properties of malate.

Rather than choosing between forms and potentially missing benefits, the triple formula covers the full spectrum. The 100,000+ people buying it monthly seem to agree that it's the right approach.

What About Oxide?

Don't buy it. Magnesium oxide is the cheapest and most widely available form — it's in many supermarket own-brand supplements. Its absorption rate is very low, meaning you're getting very little actual magnesium for your money. If you've tried magnesium supplementation before and found it didn't work, there's a reasonable chance you were taking oxide. Switch to glycinate and try again.