topicL-Carnitine Supplementation 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
topicL-Carnitine Supplementation 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
topicL-Carnitine Supplementation 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
topicL-Carnitine Supplementation 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
topicL-Carnitine Supplementation Cognitive Performance Randomized Trial
claimThis narrative review evaluates Meldonium's biochemical mechanisms, pharmacokinetics, safety profile, and the quality of evidence surrounding its use in athletes.
evidence level4
citationMalm C (2026)
sourceMeldonium and human sport performance: a narrative review evaluating the evidence for ergogenic potential.
topicL-Carnitine Supplementation Cognitive Performance Randomized Trial
claimExisting human performance studies exhibit a high risk of bias and methodological flaws.
evidence level4
citationMalm C (2026)
sourceMeldonium and human sport performance: a narrative review evaluating the evidence for ergogenic potential.
topicL-Carnitine Supplementation Cognitive Performance Randomized Trial
claimMeldonium has attracted considerable attention in sports due to its suggested effects on energy metabolism and high-profile doping cases.
evidence level4
citationMalm C (2026)
sourceMeldonium and human sport performance: a narrative review evaluating the evidence for ergogenic potential.