Obviously, there's no substitute for using an SPF lotion that's appropriate for your skin -- liberally, every day (seriously... no skimping!). But bet you didn't know that what you eat can also do a lot to aid your skin in protection from the sun.
Only a man would suggest to a 50-year old woman that she wear long sleeves on a hot day. There seems to be a severe disconnect in his understanding of the female metabolism. But he is a dermatologist and cares only about the skin. Hormones are for a braver man.