**Review of Hyphen's 0.1% Retinal Serum** I've been using Hyphen's 0.1% Retinal Serum for a few weeks now, and it has truly exceeded my expectations. The serum feels lightweight and absorbs quickly into the skin without leaving any greasy residue. What I love most is how gentle it is, despite its potent retinal concentration. Unlike other retinol-based products I've tried in the past, this one didn’t cause excessive dryness or irritation. After consistent use, I’ve noticed a significant…