Provitamin A is largely spared from ill effects, although it's the beta-carotene found in carrots that is responsible for the peculiar orange-tinted look people who jump on fad diets heavy on carrots get.
It's especially important to note that cooking can help the body absorb certain phytochemicals (or plant chemicals) found in specific foods, such as beta-carotene in carrots and lycopene in tomatoes.
Strengthens immune system - Bee pollen has both mono and polyunsaturated fats, proteins, vitamins B, C, D, E, and beta-carotene, calcium, magnesium, selenium, nucleic acids, lecithin, and cysteine.
The Proleva website also states goji berries offer more beta-carotene than carrots and that these berries improve the immune system, memory and sexual function.
These include allicin from garlic and onions, beta-carotene and vitamin C from dark green leafy vegetables and broccoli, and vitamin E from nuts and seeds.