49-year-old actor Paul Rudd has accomplished a lot in his career in the decades since he appeared in the ‘90s cult classic Clueless. One thing he hasn’t done, apparently, is age; if you compare photos of Rudd in the ‘90s with more recent photos, it’s practically impossible to tell the difference.

When asked about his secret for never seeming to age, Rudd’s answer was surprisingly simple; the funnyman told InStyle, “I am a big believer in sunscreen.”

Rudd may be a funny guy, but his belief in sunscreen is no joke. In fact, many dermatologists and other experts say sunscreen is actually the most important and effective antiaging product.

Studies have proven sunscreen not only prevents, but can even help reverse, common signs of aging like wrinkles and hyperpigmentation. Sunscreen doesn’t specifically contain any “anti-aging” ingredients, but by protecting the skin from UV damage, SPF allows your skin to naturally heal and regenerate.

Using a daily moisturizer with SPF 30 hydrates and protects your skin to keep it looking young and healthy.

Photo source: Paul Rudd by Gage Skidmore