The natural warmth of rosemary softens the buildup of dead skin cells for easy exfoliation. A naturally nutritious ingredient, rosemary also works nourish weakened scalp conditions. ESSENTIAL OIL: Essential oils are concentrated form of the original plant. The benefits are extracted the same way it has always been, through steam distillation method, that is first developed by Avicenna around the 10th century that maintains their properties and benefits. LEAF EXTRACT: Leaf extracts are obtained by decoction, which extracts the active ingredients from herbs and medicinal plants without degrading their quality by heating at low temperatures. SCIE-grade journal: Calabrese, V., et al. "Induction of heat shock protein synthesis in human skin fibroblasts in response to oxidative stress: regulation by a natural antioxidant from rosemary extract.