Sleep · computed from the label

Sleep Drink Mix

Name: Sleep Drink Mix
Brand: PreSleep

by PreSleep · $37.49 / 30 servings ($1.25/serving)

A+

Formula

Fully dosed

Deal

Worth the premium

✓ Worth it — a fair deal on a real formula

"Magnesium, glycine and theanine sleep drink." Fully disclosed, no proprietary blend.

3 of 3 recognized ingredients hit their clinically studied dose.

Ingredients vs the studied dose

Ingredient	Label dose	Status
Magnesium Glycinate 500mg magnesium glycinate — well above the 300mg dose (generous; high end for a single dose)	500mg	✓ OK
Glycine 3g glycine — right at the studied sleep dose	3g	✓ OK
L-Theanine 500mg L-theanine — well above the 200mg dose	500mg	✓ OK

Make it yourself — per serving

Ingredient (bulk)	Cost/serving
Magnesium Glycinate	$0.11
Glycine	$0.16
L-Theanine	$0.02
Flavor + sweetener	$0.20
Your DIY cost	$0.49
PreSleep charges ($37.49 / 30 servings)	$1.25

That's a 2.6× markup over building the same actives from bulk powders.

The verdict

A rare one that clears the bar on every active: 500mg magnesium glycinate, a full 3g of glycine, and 500mg of L-theanine — all at or above their studied sleep doses, with no proprietary blend and just stevia and natural flavor as filler. At ~$1.25/serving it's a fair premium over the ~$0.49 it costs to build the same three actives in bulk, since you're buying a ready-to-mix flavored drink. One of the better-formulated sleep products here — the magnesium is on the high side (loose stools for some), but that's the only nitpick.

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Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.