How often should sunbathers apply sunscreen, especially when tanning?

The correct choice is based on the importance of proper sun protection to reduce the risk of skin damage and increase safety while tanning. Sunscreen should be reapplied every two hours during sun exposure to maintain its effectiveness. This is especially crucial after activities such as swimming or excessive sweating, which can diminish the protective barrier of the sunscreen.

Reapplying frequently helps to ensure that your skin remains protected from harmful UV rays, which can lead to immediate issues like sunburn and long-term effects such as skin cancer. By adhering to this guideline, individuals can enjoy tanning more safely while minimizing potential skin damage.