What is the recommended minimum SPF to use when tanning outdoors?

The recommended minimum SPF to use when tanning outdoors is SPF 30. This level of sun protection factor (SPF) is considered effective for providing adequate protection against harmful ultraviolet (UV) radiation. SPF 30 blocks approximately 97% of UVB rays, which are primarily responsible for causing sunburn and contributing to skin cancer.

Using a sunscreen with an SPF of 30 or higher is particularly important for individuals who are spending extended periods in the sun, as it helps to mitigate the risk of sun damage while still allowing for a gradual tan. Higher SPFs offer slightly more protection; however, SPF 30 strikes a balance between adequate coverage and practicality for most outdoor activities. It’s also essential to apply the sunscreen generously and reapply it every two hours, or more frequently if swimming or sweating, to maintain effective protection.