Yes. Strand Serum is formulated with two phases: a water phase and an oil phase. The water phase helps deliver ingredients deep into the hair cortex and strengthen the hair fiber while the oil phase helps replenish the hair's natural lipid barrier and smooth the cuticle.

Because these phases have different properties, they naturally separate over time. Simply shake well before each use to combine the two phases and ensure you receive the full benefits of the formula with every application.