Creme of Nature Argan Oil Strength and Shine Leave in Conditioner. Strength & Shine Leave-In Conditioner is a unique two-phase formula that combines Argan Oil liquid shine and a strengthening protein complex that improves hair strength, protects against damage and adds exotic shine and moisture. • Revitalizes chemically treated hair from inside out. • Enhances shine. • Moisturizes hair. • Strengthening.