Vitamin C is readily available from citrus fruits and juices, bell peppers, broccoli, hot chili peppers, green leafy vegetables, tomatoes and potatoes. Deficiencies typically develop in the elderly, alcoholics, cancer patients, and some food faddists. It is found mainly in vegetable oils, sweet potatoes, avocados, nuts, sunflower seeds, soybeans and the fatty portion of meats. It is important to note that not all vitamin E is the same. The body utilizes the natural form much more efficiently and is the preferred form for supplementation.
Carotenoids are nutrients found typically in bright yellow and orange vegetables and fruits.
There are several hundred naturally occurring carotenoids available through dietary sources. Examples include lutein, lycopene, and xeaxanthin among others. Vitamin supplements often include a synthetic ingredient call beta-carotene. I generally do not recommend taking high dose beta-carotene supplements because of these findings. This is definitely a vitamin class that we are much better off getting from nutritional sources.