1. According to Shirley official website's inquiry, it promotes skin metabolism. Retinol can stimulate the metabolism of skin cells, help brighten skin tone and remove acne.
2. Promote the production of collagen. Retinol helps to increase the elasticity of skin and promote the production of collagen. For mature skin, retinol can help increase collagen, stimulate cell renewal, make necrotic cortex fall off and make skin thinner.