Sleep

A full 600 mg daily dose of organic KSM-66 ashwagandha in one capsule for about $0.25-$0.28 a day. Strong value; not for pregnancy or thyroid conditions.

A simple, well-dosed 200 mg Suntheanine softgel for calm focus and wind-down, at about $0.33 a day. Contains gelatin and coconut.

A long-running Amazon favorite: 200 mg of fully chelated magnesium per serving that is easy on the gut, but the tablets are large and the full label dose exceeds the UL.

Amazon's No. 1 magnesium: 120 mg of magnesium glycinate per capsule in a minimal, allergen-free formula that is gentle on the gut but pricey per milligram.

Cheap, strawberry-flavored melatonin that melts on the tongue. The best-selling 5 mg strength is more than most adults need; the 1 mg or 3 mg version is a smarter start.

NSF-certified gummy with a sensible 3 mg melatonin dose, but its L-theanine (50 mg) and botanicals are well below the amounts used in research.

A best-selling Magtein supplement at the full 2 g trial dose. Sleep evidence is early and industry-funded, and at about $1 a day it costs far more than other magnesium.

TikTok's viral bedtime hot cocoa: a sensible 3 mg melatonin plus 300 mg L-theanine in a 15-calorie drink, but at roughly $1.80-$2.20 a serving you pay for the ritual.

The TikTok-famous 'Sleepy Girl Mocktail' magnesium: tasty and third-party tested, but mostly laxative magnesium citrate at about $1.47 a serving.