Nécessiare, the minimalist personal care brand behind Rosemary Shampoo and Rosemary Conditioner for denser, fuller, healthier-looking hair, launched a complementary leave-in Rosemary Serum for daily use.

Rosemary-infused hair treatments have gone viral on social media for their reputed ability to stimulate hair growth, improve scalp circulation, and reduce shedding—benefits backed by both tradition and emerging science. This formula features 70% rosemary water, oil, extract and 5% Capixyl, plus plant proteins and essential ceramides. Unlike some hair treatment serums that go on greasy and feel heavy, this quick-dry alternative leaves no residue.

While the brand’s Rosemary Shampoo and Conditioner are enhanced with fine fragrance notes of rosemary, mandarin, jasmine and cedar, the Rosemary Serum smells like pure rosemary.