Feb 24, 2026Joint Health and Cartilage Support: What the Evidence ShowsCartilage has limited self-repair capacity, but several interventions modestly slow degradation and reduce symptoms. Here is what the clinical evidence supports for joint health in aging.
Feb 24, 2026Skin Aging and Photoaging: Mechanisms, UV Damage, and Evidence-Based InterventionsSkin aging involves intrinsic (chronological) and extrinsic (UV-driven photoaging) components. UV radiation is responsible for approximately 80% of visible facial aging. Topical retinoids have the strongest evidence base for reversing photoaging signs. Oral collagen peptides have emerging RCT evidence for skin hydration and elasticity. Sun protection remains the highest-impact preventive intervention.
Feb 18, 2026Vitamin C: Immune Function, Collagen Synthesis, Antioxidant Evidence, and Megadose ClaimsVitamin C is essential for collagen hydroxylation, neutrophil function, and regeneration of other antioxidants including vitamin E. Deficiency is common in older adults and smokers. Supplementation shortens cold duration modestly; megadose claims for cancer and longevity are not supported by RCT evidence.
Feb 16, 2026Collagen Peptides: Joint Pain, Skin Aging, Bone Density, and Bioavailability EvidenceHydrolyzed collagen peptides are absorbed as dipeptides and tripeptides that accumulate in cartilage, skin, and bone tissue. RCTs show meaningful joint pain reduction in osteoarthritis and sports-related joint discomfort. Skin hydration and elasticity benefits are well-replicated. Evidence for bone density is emerging.
Jan 22, 2026Glycine: Collagen Synthesis, Sleep Quality RCTs, and Methylation SupportGlycine is conditionally essential in older adults. RCTs show meaningful improvement in sleep quality and morning alertness at 3g doses. It is also the rate-limiting substrate for collagen synthesis and a methyl group buffer in methylation pathways.