A new study found an association with a lower risk of developing squamous cell carcinoma.
The study itself examined a lot of people over a long period of time; more than 48,000 men and 75,000 women over 26 years. After controlling the study to account for other health indicators, such as basic lifestyle factors and, researchers found that increased vitamin A intake was associated with a lower risk for developing SCC.
Further research is needed to help determine "who would benefit the most, in what quantity, and in what form would it be most helpful," Garshick says, particularly because excess vitamin A intake can actually be toxic. The study didn't examine vitamin A supplements, either — but rather, pure dietary intake. For reference, the recommended daily amount of vitamin A for adults is 900mcg for men and 700mcg for women.
Other foods that contain high levels of vitamin A, from either plant or animal sources, include fish, dairy, tomatoes, leafy greens like kale, sweet potatoes and fruit including mango and grapefruit. Vitamin A isn't likely the only antioxidant that helps keep skin healthy, either. "Eating a diet high in [all] antioxidants, including vitamin A, is helpful in preventing skin cancer," says Day.
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