One of four vitamin serums by Australian skincare brand Alpha-H, the Vitamin A serum seeks to improve the look of fine lines, wrinkles, texture and uneven tone. n With its lightweight, milky-green texture, the PM serum is enriched with a 0.5% concentration of retinol (a gentler alternative to prescription vitamin A), alongside moisturising squalane, tomato fruit extract and omega-rich botanical oils. These actives work in unison to counter dryness and irritation often associated with retinol products for optimal comfort and hydration.