Quick breakdown for anyone shopping for magnesium supplements right now:

Most drugstore magnesium is magnesium oxide — it's cheap to manufacture, but your body only absorbs about 4% of it. The rest just... passes through (and often causes the laxative effect magnesium is unfairly known for).

The forms that actually get absorbed and used by your body:

• Glycinate — best for sleep and calming the nervous system, gentle on the stomach

• Malate — supports energy production, good for daytime use

• Taurate — supports heart and cardiovascular health

• Citrate — well absorbed, decent all-rounder

We built Toplux around this exact problem — 8 bioavailable forms in one capsule instead of the single cheap form most brands use. If you've tried magnesium before and felt nothing, this is probably why.

Happy to answer questions on dosing or timing below.