topicGlycine Cognitive Performance Randomized Trial
claim1 Aging is characterized by progressive physiological decline, including loss of skeletal muscle mass and function (Sarcopenia), reduced mitochondrial efficiency, and increased oxidative stress, all of which contribute to frailty and diminished quality of life in older adults ().
evidence level3
citationWang Xiaolan (2026)
sourceGlycine and N-acetylcysteine supplementation, with or without exercise, in brain health and functional aging: implications for sarcopenia and frailty in older adults
topicGlycine Cognitive Performance Randomized Trial
claim1 2 3 4 5 By the age of 70, individuals may experience a 25%−30% reduction in muscle mass, which is strongly associated with impaired mobility, falls, and loss of independence ().
evidence level3
citationWang Xiaolan (2026)
sourceGlycine and N-acetylcysteine supplementation, with or without exercise, in brain health and functional aging: implications for sarcopenia and frailty in older adults
topicGlycine Cognitive Performance Randomized Trial
claimLow circulating glycine levels have been associated with insulin resistance, obesity, and higher cardiometabolic risk (,).
evidence level3
citationWang Xiaolan (2026)
sourceGlycine and N-acetylcysteine supplementation, with or without exercise, in brain health and functional aging: implications for sarcopenia and frailty in older adults
topicGlycine Cognitive Performance Randomized Trial
claimIn this review, the term “older adults” generally refers to individuals aged ≥60 or ≥65 years, consistent with definitions used by the World Health Organization and most geriatric clinical trials.
evidence level3
citationWang Xiaolan (2026)
sourceGlycine and N-acetylcysteine supplementation, with or without exercise, in brain health and functional aging: implications for sarcopenia and frailty in older adults
topicGlycine Cognitive Performance Randomized Trial
claimFailure to meet the recommended 7-9 hours of restful sleep per night is known to increase the risk of several health conditions, reason why regular and adequate sleep should be seen as a priority instead of an unnecessary commodity easily traded as required by the commitments of our busy lives.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicGlycine Cognitive Performance Randomized Trial
claimWhile both the quantity and the quality of sleep can be largely improved with relatively straightforward practices dictated by good sleep hygiene, emerging research suggests that dietary and supplementation protocols focused on certain foods, nutrients, and biochemical compounds with sleep-promoting properties can act as subsidiary sleep aids in complementing these behavioral changes.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicGlycine Cognitive Performance Randomized Trial
claimThe scope of this narrative review is to summarize the available evidence on the potential benefits of selected nutraceuticals in the context of circadian rhythm and sleep disturbances, namely melatonin, magnesium, omega-3 fatty acids, tart cherry juice, kiwifruit, apigenin, valerian root, L-theanine, glycine, ashwagandha, myoinositol, Rhodiola rosea, and phosphatidylserine.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicGlycine Cognitive Performance Randomized Trial
claimHumans spend approximately one third of their life asleep but, as counterintuitive as it may sound, sleep is far from being a quiet state of inactivity.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.