Yes, you can still tan with sunscreen, but it will take longer and be less intense. Sunscreen doesn't completely block all UV rays; it reduces your exposure. Even SPF 50, which blocks 98% of UV rays, allows 2% through, enough to cause some tanning.1, 6 However, this tan is still damaging to your skin and is not a "safe tan".4
How Sunscreen Affects Tanning
- Reduced UV Exposure: Sunscreen's primary function is to reduce your skin's exposure to ultraviolet (UV) rays, the primary cause of sunburn and tanning. The higher the SPF number, the greater the protection. However, no sunscreen provides 100% protection.1, 6
- Gradual Tanning: With sunscreen, the tanning process is significantly slowed down.3, 5 You'll get a less intense tan, and it will take much longer to develop compared to unprotected sun exposure.
- UVA Filters Matter: The effectiveness of sunscreen in preventing tanning depends, in part, on its UVA filter strength. Sunscreens with strong UVA filters are better at preventing tanning than those without.2
The Importance of Sunscreen
Despite the possibility of tanning with sunscreen, it's crucial to remember that any tanning is a sign of skin damage. A tan is your skin's response to UV radiation, which causes damage at the cellular level, increasing the risk of skin cancer and premature aging.4, 7, 8 Wearing sunscreen is essential to minimize this damage, even if a slight tan develops.
Practical Considerations
- Reapplication: Always reapply sunscreen every two hours, or more frequently if swimming or sweating.
- SPF Strength: Choose a broad-spectrum sunscreen with an SPF of 30 or higher.
- Quantity: Use a sufficient amount of sunscreen – enough to cover the entire area of exposed skin.
