NEW
🧱 Boron
Now Supplements,Boron 3 mg (Bororganic Glycine),Structural…
Cost per serving
$0.05
500 servings · ~500-day supply
$24.00Price from Amazon.com
NOW Foods · Amazon.com 0
See the offer Best Glycine for sleep
Glycine is an amino acid that slightly lowers core body temperature, one of the body’s signals for falling asleep — the idea behind taking it at bedtime. Below, the glycine products people use ranked by real cost per dose. A value comparison, not medical advice.
Updated September 2026
What the evidence actually shows
Limited — a few small Japanese trials of 3 g before bed reported better subjective sleep and less next-day tiredness. The studies were small and short, and several were funded by a glycine manufacturer.
Commonly used: 3 g before bed.
How this list is built: these are glycine products ranked by real cost per dose across our whole glycine catalogue — not filtered or re-ordered by sleep. We don’t hold per-product evidence for a specific use, so we don’t pretend to rank for one. Products whose own label says they are for something else are left out.
The dose, the studies and what to watch for, in full: Glycine for sleep: the 3 g dose, and what it costs.
Ranked by cost per dose
NEW
🧱 Boron
NOW Supplements, Boron 3 mg (Bororganic Glycine), Structural…
Cost per serving
$0.05
250 servings · ~250-day supply
$12.00Price from Amazon.com
NOW Foods · Amazon.com 0
See the offer NEW
🧱 Boron
NOW Foods Supplements, Boron 3 mg (Bororganic Glycine)…
Cost per serving
$0.05
100 servings · ~100-day supply
$5.15Price from Amazon.com
NOW Foods · Amazon.com 0
See the offer NEW
🌙 Glycine
Glycine 1000mg, Relaxing Amino Acid Supplement, Sleep Support…
Cost per serving
$0.07
300 servings · ~300-day supply
$19.95Price from Amazon.com
Double Wood Supplements · Amazon.com 0
See the offer NEW
![Puregen Labs Glycine 1000mg [High Potency] Total…](/_next/image?url=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F41zQq4Uv14L._SL500_.jpg&w=3840&q=75)
🌙 Glycine
Puregen Labs Glycine 1000mg [High Potency] Total…
Cost per serving
$0.08
300 servings · ~300-day supply
$23.95Price from Amazon.com
Puregen Labs · Amazon.com 0
See the offer NEW
🌙 Glycine
Glycine Powder, 300 Servings (2 lb) – 3,000 mg Free-Form…
Cost per serving
$0.09
300 servings · ~300-day supply
$25.99Price from Amazon.com
NatureBell · Amazon.com 0
See the offer NEW
🌙 Glycine
Now Supplements, Glycine 1,000 mg Free-Form, Neurotransmitter…
Cost per serving
$0.10
250 servings · ~250-day supply
$24.00Price from Amazon.com
NOW Foods · Amazon.com 0
See the offer NEW
![Puregen Labs Glycine 1000mg [High Potency] 100 Vegetarian…](/_next/image?url=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F41L9QWe38BL._SL500_.jpg&w=3840&q=75)
🌙 Glycine
Puregen Labs Glycine 1000mg [High Potency] 100 Vegetarian…
Cost per serving
$0.10
100 servings · ~100-day supply
$9.99Price from Amazon.com
Puregen Labs · Amazon.com 0
See the offer NEW
🌙 Glycine
Now Foods Glycine 1000mg
Cost per serving
$0.11
200 servings · ~200-day supply
$22.50Price from Amazon.com
NOW Foods · Amazon.com 0
See the offer See the full ranking, benchmarks and lab-tested brands on best glycine by cost per dose.
Frequently asked
Does glycine help with sleep?+
Limited — a few small Japanese trials of 3 g before bed reported better subjective sleep and less next-day tiredness. The studies were small and short, and several were funded by a glycine manufacturer. 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 glycine is cheapest for sleep?+
As of September 2026, the best value we track is Now Supplements,Boron 3 mg (Bororganic Glycine),Structural Support*,250 Veg Capsules,(Pack of 2). The full ranking by cost per dose is above; Price ÷ servings ÷ dose — the number retailers rarely divide out.
How much glycine for sleep?+
Commonly 3 g before bed. This is a general reference, not a prescription — confirm the right amount for you with a clinician. Not medical advice.