Ruka Hair closes $4.5M round co-led by Henkel Ventures

London biotech haircare brand Ruka Hair raised $4.5M co-led by Freedom Trail Capital and Henkel Ventures, bringing total funding to $10M. Henkel Ventures' bet on collagen-protein hair extensions lands the same quarter Henkel AG integrates Olaplex and Not Your Mother's — a parallel-track signal on the next haircare category.