topicBetaine Exercise Performance Randomized Trial
claimInterventions that alter metabolite availability or metabolism, such as caloric restriction (CR) or reduced insulin/IGF‐1 signaling (IIS), extend lifespan across species (Gao et al. ).
evidence level3
citationJiang Yizhou (2026)
sourceLifespan‐Extending Endogenous Metabolites
topicBetaine Exercise Performance Randomized Trial
claimThis review highlights the role of endogenous metabolites in regulating longevity pathways and evaluates evidence across species to aid understanding metabolic regulation of aging and guiding future investigations.
evidence level3
citationJiang Yizhou (2026)
sourceLifespan‐Extending Endogenous Metabolites
topicBetaine Exercise Performance Randomized Trial
claimIn UVB‐irradiated hairless mice, oral taurine preserved epidermal moisture and significantly reduced wrinkle formation, suggesting an anti‐photoaging action via its osmolyte and moisturizing roles (Yoshimura et al. ).
evidence level3
citationJiang Yizhou (2026)
sourceLifespan‐Extending Endogenous Metabolites
topicBetaine Exercise Performance Randomized Trial
claim2023 2018 2021 2025 2013 Aging is a multifactorial process driven by the interplay of genetic, environmental, and metabolic perturbations, with dysregulated nutrient sensing and metabolic dysfunction recognized as core hallmarks (Lopez‐Otin et al. ).
evidence level3
citationJiang Yizhou (2026)
sourceLifespan‐Extending Endogenous Metabolites
topicBetaine Exercise Performance Randomized Trial
claimPlasma betaine concentrations are inversely associated with cardiovascular events [], and higher levels have been linked to a pattern of favorable lifestyle habits and leanness [].
evidence level4
citationNieman David C. (2025)
sourceBetaine Supplementation Improves 60 km Cycling Time Trial Performance and One-Carbon Metabolism in Cyclists During Recovery
topicBetaine Exercise Performance Randomized Trial
claimThe ergogenic and clinical effects of betaine have been investigated with doses ranging from 0.5 to 20 g/d, with 1.5–6 g/d found to be sufficient to increase plasma betaine and methionine concentrations and lower homocysteine within 2 weeks [].
evidence level4
citationNieman David C. (2025)
sourceBetaine Supplementation Improves 60 km Cycling Time Trial Performance and One-Carbon Metabolism in Cyclists During Recovery
topicBetaine Exercise Performance Randomized Trial
claimNo sex differences were found for 60 km cycling performance in terms of average percent maximal heart rate, power output in watts, and oxygen consumption rates (all> 0.13).
evidence level4
citationNieman David C. (2025)
sourceBetaine Supplementation Improves 60 km Cycling Time Trial Performance and One-Carbon Metabolism in Cyclists During Recovery
topicBetaine Exercise Performance Randomized Trial
claim1 2 3 4 5 Prolonged and intensive endurance exercise causes post-exercise inflammation, oxidative stress, immune suppression, and extensive perturbations in hundreds of circulating proteins and metabolites.
evidence level4
citationNieman David C. (2025)
sourceBetaine Supplementation Improves 60 km Cycling Time Trial Performance and One-Carbon Metabolism in Cyclists During Recovery