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Refined Alpha-s1 Casein Hydrolysate Associated With Improved Sleep Quality


Alpha-s1 casein hydrolysate is one of the main components of milk
protein. A recent study suggests that supplementation with refined alpha-s1
casein hydrolysate may help improve sleep quality.





Forty-eight adults with a mild to moderate degree of sleep
disturbance participated in the study. The participants took either 300 mg of
refined alpha-s1 casein hydrolysate or a placebo daily for four weeks. The
participants switched interventions after a four-week washout period. The
researchers continuously monitored the participants’ subjective sleep quality,
daytime functioning, and psychiatric characteristics. The participants kept a
daily sleep record that included when they went to sleep and woke up, time in
bed, time taken to fall sleep, and number and time of each waking after sleep
onset.





The researchers found that refined alpha-s1 casein hydrolysate
supplementation resulted in improvements in sleep disturbance, daytime
functioning, and psychiatric characteristics. Supplementation also increased
total sleep time and sleep efficiency, and reduced sleep latency and wake after
sleep onset.





The study was conducted by researchers from the Ewha Womans
University Mokdong Hospital. It was published on June 27, 2019 in the journal Nutrients.


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