NEW
😴 L-tryptophan
Pure Original Ingredients L-Tryptophan (365 Capsules) No…
Cost per serving
$0.04
365 servings · ~365-day supply
$15.99last seen · confirm on Amazon.com
Amazon.com 0
See the offer Best Magnesium for sleep
Magnesium is the mineral most associated with sleep, and glycinate is the gentle, commonly-chosen form (oxide is cheaper but poorly absorbed and laxative). Below, the magnesium products people use ranked by real cost per dose (to the commonly-studied 300 mg dose). A value comparison, not medical advice.
Updated August 2026
What the evidence actually shows
The evidence is limited and mixed — small trials suggest a modest benefit for sleep quality, mainly in older adults or people who are low in magnesium. It is not a sedative.
Commonly used: ~200–350 mg elemental in the evening.
Background on magnesium from the NIH Office of Dietary Supplements .
For sleep, glycinate is the form usually chosen — see best glycinate by cost per dose.
Ranked by cost per dose
NEW
🍋 Lemon Balm
NatureBell Valerian Root for Sleep
Cost per serving
$0.05
300 servings · ~300-day supply
Well absorbed
$14.95Price from Amazon.com
Amazon.com 0
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🌶️ Capsaicin (cayenne)
PURE ORIGINAL INGREDIENTS Cayenne Pepper (730 Capsules) No…
Cost per serving
$0.05
730 servings · ~730-day supply
$37.29Price from Amazon.com
Amazon.com 0
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🥤 Electrolytes
Advanced Electrolyte Pills
Cost per serving
$0.06
240 servings · ~240-day supply
$13.99Price from Amazon.com
Amazon.com 0
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🥤 Electrolytes
Advanced Electrolyte Complex Capsules for Hydration
Cost per serving
$0.06
240 servings · ~240-day supply
High absorption
$14.99Price from Amazon.com
Amazon.com 0
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🔋 D-ribose
Pure Original Ingredients D-Ribose (365 Capsules) No Magnesium…
Cost per serving
$0.06
365 servings · ~365-day supply
$22.99Price from Amazon.com
Amazon.com 0
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🌶️ Capsaicin (cayenne)
PURE ORIGINAL INGREDIENTS Cayenne Pepper (365 Capsules) No…
Cost per serving
$0.06
365 servings · ~365-day supply
$23.49Price from Amazon.com
Amazon.com 0
See the offer NEW
⚫ Black Seed
Tart Cherry+ with Magnesium Glycinate & 95% Turmeric Curcumin
Cost per serving
$0.07
300 servings · ~300-day supply
Well absorbed
$21.95Price from Amazon.com
Amazon.com 0
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🌙 Magnesium
NatureBell Magnesium Malate 1
Cost per serving
$0.07
240 servings · ~240-day supply
$17.99Price from Amazon.com
NatureBell · Amazon.com 0
See the offer See the full ranking, benchmarks and lab-tested brands on best magnesium by cost per dose.
Frequently asked
Does magnesium help with sleep?+
The evidence is limited and mixed — small trials suggest a modest benefit for sleep quality, mainly in older adults or people who are low in magnesium. It is not a sedative. This page ranks the products people take by real cost per dose; it does not claim a supplement treats or cures anything. Not medical advice — talk to a clinician about sleep.
Which magnesium is cheapest for sleep?+
As of August 2026, the best value we track is Pure Original Ingredients L-Tryptophan (365 Capsules) No Magnesium Or Rice Fillers, Always Pure, Lab Verified. The full ranking by cost per dose is above; for sleep, glycinate is the form usually chosen. Price ÷ servings ÷ dose — the number retailers rarely divide out.
How much magnesium for sleep?+
Commonly ~200–350 mg elemental in the evening. This is a general reference, not a prescription — confirm the right amount for you with a clinician. Not medical advice.