Guidelines for using sunscreen to protect from overexposure are:
1. Choose the appropriate type of sunscreen: This choice should be according to your type of hair. There are sunscreens of drier texture and others of oily texture, you must choose the one that best fits the natural characteristics of your skin.
2. Choosing the protection factor: When sun exposure is intentional - such as on the beach or in the pool - the sun protection factor (SPF) should be at least 30. However, people with fair skin, or who have very sensitive skin should use protectors with a protection factor of, at least, 50.
3. Know the right amount: When there is an intentional exposure, such as when going to the beach or pool, the correct way to use sunscreen is to apply two layers of the product all over the body or a teaspoon for face, head and neck; two teaspoons to the front and back of the torso; one teaspoon for each arm and two teaspoons for each leg. Sunscreen should be applied 15 minutes before sun exposure and reapplied every two hours while exposed.