Evo Home Base Serum 30mla leave on scalp serum that soothes the scalp while protecting against moisture loss to leave the scalp feeling hydrated, balanced and calm Evo Home Base Scalp Serum is specially formulated with a scalp complex that soothes and reduces inflammation, providing much needed relief. The inclusion of hydrogenated castor oil creates a protective barrier that prevents moisture loss, effectively addressing issues such as itchiness, dryness, and irritation.