One of the most common comments I hear from patients is "I don't use sunscreen because my makeup has sunscreen in it." Sometimes people don't use sunscreen because it is in their moisturizer. And some don't use it because they do not like the way it feels. I recommend daily use of sunscreen, whether it is sunny or raining, hot or cold, winter or summer, and whether or not you are outside. According to the American Academy of Dermatology, sunscreen should have a minimum SPF of 30 and it should have UVA and UVB (or broad spectrum) protection, which should be evident on the label. There are many different brands of sunscreen. Find one that feels comfortable and has a minimum SPF of 30 with UVA and UVB protection.
Both UVA and UVB can cause damage to the skin. The damage is seen as fine lines, textural irregularities, and laxity; signs of premature aging. Additionally, sun exposure can lead to pre-cancerous lesions called actinic keratoses as well as cancers such as basal cell carcinoma and squamous cell carcinoma. To prevent premature aging, pre-cancers, and cancers, daily sunscreen use is essential.
Both UVA and UVB can cause damage to the skin. The damage is seen as fine lines, textural irregularities, and laxity; signs of premature aging. Additionally, sun exposure can lead to pre-cancerous lesions called actinic keratoses as well as cancers such as basal cell carcinoma and squamous cell carcinoma. To prevent premature aging, pre-cancers, and cancers, daily sunscreen use is essential.
There are various components in sunscreens which contribute to the overall SPF value. However, they are not all additive and the association is not linear. For example if a moisturizer contains sunscreen at an SPF 15 and makeup contains sunscreen with SPF 15, the total SPF is not necessarily 30. This is why I recommend sunscreen to be included in everyone's skin care regimen even if other components such as moisturizer and makeup contain sunscreen. Sunscreen should be applied after moisturizer and before makeup. For an added boost, use daily topical antioxidants such as vitamin C. These antioxidants neutralize the residual damage that occurs to the skin even when sunscreen is used properly.