The FormulaUnlike skin ageing, the signs of hair ageing often begin long before they're visible. In fact, many of the changes that affect hair density, strength and pigmentation happen beneath the scalp, making them easy to overlook until they become more pronounced. That's where K18's FutureIQ Biomimetic Hair Longevity Serum comes in. Powered by the brand's pioneering MultiVital™ Technology, a biomimetic complex inspired by the biology of healthy, youthful hair, it works at the scalp to target four key drivers of hair ageing at once:Antioxidant defence to help protect follicles from oxidative stress. Pigmentation support to help maintain your natural hair colour.