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.

Cleanses, cocktails and 'cortisol face' are everywhere online. Endocrinologists say almost none of it works, and the real ways to calm the stress hormone are cheaper and duller than the trend admits.