Clinical Blogs — Physical Sunscreen

Why do we need sunscreen? Sunscreen is the first defense against aging. What are the differences between physical sunscreen and chemical sunscreen? Chemical sunscreen Absorbs into skin and change the UV rays into heat (e.g. octinoxate, homosalate) Mostly protects against UVB only May disrupt hormonal balance in our body (human sex hormone and thyroid hormone) May cause allergic reaction Need to apply about 20 to 30 minutes before exposure to sun Physical sunscreen Zinc oxide and titanium dioxide Sits on the skin surface to reflect all UV rays (UVA & B) No absorption into the skin Safe Possesses anti-inflammatory effect...