Blog
Blog
Best Anti Aging Serum: How Peptides, Retinol, and Hyaluronic Acid Work
by Glenari Editorial Team
on May 01 2026
Effective anti-aging requires three actives targeting three aging processes: peptides (collagen signaling via Acetyl Octapeptide-3 and Tripeptide-29), retinol (collagen gene activation and cell turnover), and hyaluronic acid (multi-depth hydration and barrier protection). Complete AM/PM protocol, what to look for in each product category, ceramide role, 4-phase timeline, and perimenopause considerations.
Blog
Hyaluronic Acid and Retinol: Can You Use Them Together?
by Glenari Editorial Team
on Apr 24 2026
Retinol is the most effective anti-aging active but causes dryness that makes most people quit. Hyaluronic acid solves this — reducing TEWL from 28 to 11 g/m²/h without reducing retinol efficacy. Exact layering order, 4-phase retinol adjustment protocol with HA buffering, HA sandwich method for sensitive skin, 4 retinol types compared, and the advanced HA + retinol + peptides evening routine.