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doi:10.3390/ijms23020739 Yaribeygi H, Maleki M, Jamialahmadi T, et al
Analysis based on information available as of December 26, 2025
In this study, 75 resistance-trained males were randomly assigned to ingest 200 mg/day of glutathione + 2 grams/day of L-citrulline (GSH + CIT), 2 grams/day of L-citrulline-malate, or cellulose placebo daily while also participating in 8 weeks of resistance training
The difference in effectiveness could be attributed to tirzepatides GIP agonism and its more robust ability to promote weight loss
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This blend is designed to support aging well through two complementary priorities: 1) Collagen + Skin Integrity Support (GHK-Cu) GHK-Cu is often chosen to support: Collagen and elastin pathways Skin repair and tissue remodeling Overall skin resilience as we age 2) Healthy Aging + Rhythm Support (Epithalon) Epithalon is commonly used in protocols that aim to support: Cellular signaling related to aging and recovery Restorative sleep and circadian rhythm (which impacts hormones, metabolism, and skin health) A proactive longevity-focused wellness routine In simpler terms: GHK-Cu supports what you see in the mirror , while Epithalon supports the internal processes that help you stay resilient over time
