As great as outdoor exercise is, it does have its disadvantages. One of the biggest during the warmer months is the damaging effects of the sun’s rays. Whatever the risks of sunscreen may be, they are not as great as the risks going unprotected in the sun. So I believe it is better to wear sunscreen than to go without, especially if you have fair skin. Even fitness revolutionaries are not immune. This article by the New York Times has a lot of good advice – What to Look for in a Sunscreen Don’t worry, it won’t prevent vitamin D production.
In some parts of the world, skin cancer is an epidemic and sunlight is the primary culprit. Besides this, UV light can damage the skin and accelerate its ageing. Some 30 year olds can look like 40 due to too much sun exposure.
Besides avoiding the sun in the middle of the day, wearing clothing to protect your skin, and wearing sunscreen, did you know that what you eat can make your skin more sensitive to sunlight? For example, celery contains natural chemicals(psoralens) that make your skin more photosensitive. According to the National Institute for Occupational Safety and Health, Cincinnati, OH, Phytophotodermatitis from celery among grocery store workers:
These observations suggest that clinical phytophotodermatitis among grocery store workers may be caused by healthy celery and results from a complex interaction of exposure variables, including ultraviolet radiation from tanning salon use, frequency of handling celery, celery brand, and sporadic elevation of psoralen content from environmental stresses.
So if you are going to spend some time out in the sun, avoid celery. It isn’t one of the healthiest vegetables anyway. Other vegetables and fruits have natural chemicals that may help protect your skin from sunlight.