The sun produces two types of UV rays that reach us here on Earth: UVA and UVB rays. UVA rays plays a greater role in skin premature aging, while UVB rays cause sunburns that can lead to serious health issues, like skin cancer.
Our bodies have a natural defense for these UVA and UVB rays. It’s called melanin. When your skin is exposed to sunshine, it produces more melanin causing skin to darken (or tan), which offers even more protection.
However, for the vast majority of people, melanin isn’t enough. Overexposure to the sun’s UV rays can penetrate the outer skin (epidermis) and cause damage to deeper skin cells (dermis). This can result in signs of pre-mature aging. We’ll get into how to do that next!