“It works for me and my wife.”“Y’all,” says another TikTokker, well over 40ish, “this magnesium lotion and spray is magic in the bottle.”The claimEnthusiasts claim that magnesium lotion — specifically applied to feet — can improve sleep. Theodosakis theorizes that any benefits realized from magnesium lotion are likely from the massage used to apply it or the lotion’s moisturizing ingredients. For some of the sleep conditions that magnesium lotion supposedly treats, says Winkelman, there are medically proven treatments. Restless legs syndrome, for example — something some influencers say is eased with an application of magnesium lotion — has actual tested medical therapies. Restless leg syndrome is something that he treats frequently, for example, and something that influencers swear can be treated with magnesium lotion.