Adults seeking evidence-based support for skin hydration/elasticity and fine lines.
Form: bovine/marine collagen peptides
Dose: 5–10 g/day
Any time; consistency matters
12 weeks
Why: Multiple RCT meta-analyses show significant improvements in hydration and elasticity vs placebo.
Form: sodium hyaluronate
Dose: 120–240 mg/day
With or without food
8–12 weeks
Why: Placebo-controlled RCTs report improvements in moisturization and wrinkle scores.
Dose: 10–70 mg/day (per product)
With meals
Notes: Meta-analyses and RCTs suggest improved hydration and reduced TEWL.