Summary:
Unlikely to help sleep but may improve how well rested you feel. Seemingly only beneficial short-term.
Dosage:
3g
Time of Day:
30-60 mins before bed
Notes:
Studies on glycine have not found supplementation to improve sleep quality or reduce the amount of time it takes to fall asleep, but participants reported feeling significantly more rested the following morning.
Though glycine does not provide the health benefits that result from improved sleep quality, the perception of having had a good night’s sleep makes for a comfortable and energetic morning. Plus, glycine is cheap and safe, making it a viable supplement option.
Studies on glycine have all been short-term (four days or less), and anecdotal reports suggest that benefits wear off. Therefore, glycine is probably best used intermittently.