Kate Somerville is one of my all-time, hands-down go-to skin care lines. (The Anti-Bac Clearing Lotion for acne and +Retinol Vita C Power Serum are must-haves) Well — herald the trumpets! — they have a new line of serums called Kx Active Concentrates that are designed to firm, moisturize and downplay your fine lines, all without irritation (which is the bit that caught my eye). Kate recommends layering two drops (because the serums are super concentrated) of the Kx Active…