Does this TikTok potion really help with sleep?

Thousands of TikTok users claim that all you need for a restful night’s sleep is a scoop of magnesium powder, a few glugs of sour cherry juice, and a little seltzer—or is it?

The concoction has been making the rounds on social media for months under the moniker “sleepy girl mocktail.” Drink it before bed (ideally in a…