The internet's favorite evidence for stacking creatine with magnesium tested a compound most people are not taking. What the trials actually show, and where the safety ceilings sit.

Two of the most-searched calm-down supplements do very different jobs. Here is what the evidence shows, and how to tell which one your sleep problem needs.

L-theanine and magnesium are the internet's favorite sleep supplements. Here is what randomized trials actually found, and which one fits sleep versus anxiety.

Glycinate is calming and gentle; citrate is well absorbed but mildly laxative. Which magnesium fits sleep, constipation and daily use, and what the evidence actually shows.

A single 2009 study on male rugby players still scares women with PCOS away from creatine. Here's what the actual research on women shows about dosing, bloating, and hormones.