Magnesium Glycinate vs Citrate vs L-Threonate

Magnesium products are easier to compare when you check elemental magnesium, chemical form, serving size, and capsule count together.

This page is for general reference only and is not medical advice, diagnosis, treatment, or prescription. Research and regulatory status can change, so ask a qualified professional when medical judgment is needed.

2026 search trend

In ConsumerLab’s 2026 survey, magnesium rose 5.3 percentage points and remained the second-most-purchased supplement. Search behavior is also becoming more form-specific, especially around glycinate and L-threonate.

What to compare on product labels

• Check the form listed in Supplement Facts: glycinate, citrate, L-threonate, oxide, or a blend.
• Compare elemental magnesium per serving rather than the larger compound weight on the front label.
• Check capsules per serving, daily frequency, added minerals, and price per serving.
• No single form is automatically best for everyone; tolerability and convenience still matter.

Other names and search terms

Ingredients often compared together

Cautions

• Supplemental magnesium can cause diarrhea, nausea, or abdominal cramping.
• Ask a qualified professional if you have kidney disease or take prescription medicine.
• Some antibiotics and other medicines may need to be separated from magnesium.

Check products on Supplecipe

Search the ingredient, switch to the single-ingredient filter, then open product comparison or stack analysis for the products you are considering.