retinoid serum
5 Beauty Hacks That Beat Cream vs Serum Retinoid
A recent study shows a 40% higher irritation rate with 1% retinoid cream compared to a 0.5% serum, so the gentler serum is the better choice for age-proof skin. Experts agree that the liquid formula delivers anti-aging benefits while keeping the barrier calm. Retinoid Serum: Why 40-Plus Women Prefer