NOW Foods Glycine Review: The Sleep Supplement You Have Never Heard Of

Name: NOW Foods Glycine
Brand: NOW Foods
Rating: 4.3 (11780 reviews)

The Snooze Geek

April 22, 2026

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NOW Foods Glycine 1000mg Sleep Supplement

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The Snooze Geek

Snooze Geek Editorial Team

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Independently tested & fact-checked

Updated

April 22, 2026

NOW Foods Glycine 1,000mg – 100 Capsules Check Price on Amazon

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Evidence-Based Sleep Support

Multiple human clinical trials have shown that 3g of glycine taken before bed noticeably improves subjective sleep quality, reduces sleep onset time, and decreases daytime sleepiness – without affecting sleep architecture or causing dependency.

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Free-Form Amino Acid

NOW Foods uses free-form glycine, meaning it’s not bound to other compounds and is readily absorbed. Each capsule delivers 1,000mg, so a standard 3-capsule dose before bed matches the amounts used in research studies.

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Clean, Trusted Formula

NOW Foods is one of the most respected supplement brands in the industry. This glycine is non-GMO, GMP quality assured, and manufactured in a facility regularly audited for quality and purity. No fillers, artificial colors, or unnecessary additives.

In-Depth Review

NOW Foods Glycine is a well-researched amino acid supplement that has quietly become one of the most respected sleep aids in the natural health community. With over 5,400 Amazon reviews and a 4.6-star rating, it’s trusted by thousands who prefer sleep supplements that aren’t melatonin or magnesium. Clinical studies show that glycine taken before bed can reduce the time it takes to fall asleep, improve sleep quality, and reduce daytime fatigue – without grogginess the next morning.

Glycine supplementation is ideal for people who have already tried melatonin or magnesium and want a different mechanism for sleep support. It’s particularly interesting for those with elevated body temperature at night (glycine helps lower core body temperature, a key trigger for sleep onset) and for people who want a non-hormonal sleep aid they can use nightly long-term.

What We Like

Evidence-Based Sleep Support: Multiple human clinical trials have shown that 3g of glycine taken before bed noticeably improves
Free-Form Amino Acid: NOW Foods uses free-form glycine, meaning it’s not bound to other compounds and is readily absorbed.
Clean, Trusted Formula: NOW Foods is one of the most respected supplement brands in the industry. This glycine is non-GMO, G

What Could Be Better

Limited options available

Final Verdict

NOW Foods Glycine is the go-to choice for anyone exploring sleep supplements beyond melatonin. Backed by solid research, trusted brand, and over 5,400 positive reviews – it’s a science-based sleep aid that deserves more attention.

Check Price on Amazon