Excessive sun exposure has been linked to skin cancer and is the number one cause of premature aging. Daily use of sunscreen is recommended. The SPF number indicates its effectiveness: higher number = higher protection. Use a minimum 30 SPF in summer months. Look for a sunscreen with UVA, UVB and high broad spectrum protection. Consider adding a UV app to your mobile device. Check it daily for the UV Index and have it remind you to reapply sunscreen. Another option for protecting your face is a mineral makeup. Glo Beauty Mineral Makeup uses pharmaceutical grade minerals and vitamins for UVA and UVB protection.