Exactly how this works is unknown, but glycine is thought to act in part by lowering body temperature at bedtime, signalling that it’s time to sleep.

In one study, participants suffering from poor sleep consumed three grams of glycine or a placebo immediately before bedtime.

Those in the glycine group reported feeling less fatigued the next morning.

They also said their liveliness, peppiness and clear-headedness were higher the next morning. 

In addition to supplementation, you can also consume glycine by eating foods rich in the nutrient, including bone broth, meat, eggs, poultry, fish, beans, spinach, kale, cabbage and fruits like bananas and kiwis.

In fact, kiwis have been singled out for sleep-inducing properties.

In a four-week study, 24 adults consumed two kiwifruits one hour before going to bed each night.

At the end of the study, participants fell asleep 42 percent more quickly than when they didn’t eat anything before bedtime.

Source: | Daily Express

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