Ingredient-savvy consumers know what they’re looking for browsing the haircare aisles of trendy retailers like Target and Walmart. Currently, the top-growing ingredients in hair care are biotin and ketoconazole per Spate’s Popularity Index. Biotin Biotin, also known as vitamin B7, is a common ingredient in hair care products thanks to its reputation for improving scalp circulation, increasing hair density and strengthening hair follicles. Interest in biotin has grown by +112.1% compared...