Scientists have found through long-term experiments that the strong antioxidant and anti-tumor activities of fruits and vegetables are the result of the interaction of various antioxidants contained within them.
In the past, it was commonly believed that the anti-tumor and cardiovascular benefits of fruits and vegetables came from vitamins C, E, and carotene. However, experiments have shown that no single vitamin can provide these effects. On the contrary, high doses of these vitamins can cause toxic damage to the body. Only the interaction of multiple antioxidants in fruits and vegetables can produce disease-fighting effects.
Experiments have also shown that plant antioxidants extracted from apples have a significant inhibitory effect on colon and liver cancer cells, so the saying "an apple a day keeps the doctor away" is not valid.