Preformed vitamin A and pro-vitamin A
Laetrile is a partly man made (synthetic) form of the natural substance amygdalin. Amygdalin is a plant substance found naturally in raw nuts and the pips of many fruits, particularly apricot pips, or kernels. It is also present in plants such as lima beans, clover and sorghum.  Vitamin A is a fat-soluble vitamin. Two different types of vitamin A are found in the diet. Preformed vitamin A is found in animal products such as meat, fish, poultry and dairy foods. The other type, pro-vitamin A is found in plant-based foods such as fruits and vegetables. The most common type of pro-vitamin A is beta-carotene Foods that contain a significant amount of vitamin K include beef liver, green tea, turnip greens, broccoli, kale, spinach, cabbage, asparagus, and dark green lettuce. Chlorophyll is the substance in plants that gives them their green color and provides vitamin K. Vitamin K is a fat-soluble vitamin, so your body stores it in fat tissue and the liver. It is best known for its role in helping blood clot, or coagulate, properly. The K comes from its German name, Koagulationsvitamin. Vitamin K also plays an important role in bone health. It is rare to have a vitamin K deficiency Retinol is an active form of vitamin A. It is found in animal liver, whole milk, and some fortified foods. Carotenoids are dark-colored dyes (pigments) found in plant foods that can turn into a form of vitamin A. There are more than 500 known carotenoids. Preformed vitamin A is found in animal products such as meat, fish, poultry and dairy foods. The other type, pro-vitamin A is found in plant-based foods such as fruits and vegetables. Vitamin A comes from animal sources, such as eggs, meat, fortified milk, cheese, cream, liver, kidney, cod, and halibut fish oil. However, all of these sources -- except for skim milk that has been fortified with Vitamin A -- are high in saturated fat and cholesterol. Preformed vitamin A is found in animal products such as meat, fish, poultry and dairy foods. The other type, pro-vitamin A is found in plant-based foods such as fruits and vegetables. Basic Description. Vitamin C may be the most familiar of all of the nutrients. Although most adults would be hard pressed to name a good food source of biotin or riboflavin, most everyone can name citrus fruits as good sources of vitamin C. It is also a commonly used nutritional supplement. Our best food sources of vitamin C have a single thing in common: they are all plant foods. Even though many—even most—animals make vitamin C in their bodies, only plants make it to the degree that they provide a rich source of the nutrient when eaten. Vitamin A is a vitamin. It can be found in many fruits, vegetables, eggs, whole milk, butter, fortified margarine, meat, and oily saltwater fish. It can also be made in a laboratory. Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings). Dietary Sources. Vitamin A in the form of retinyl palmitate is found in: 1  Beef, calf, and chicken liver. 2  Eggs. 3  Fish liver oils. 4  Dairy products, including whole milk, whole milk yogurt, whole milk cottage cheese, butter, and other cheeses. Overview. Vitamin A is a fat-soluble vitamin that has several important functions in the body. 1  It helps cells reproduce normally, a process called cellular differentiation. 2  It is essential for good vision. 3  The first sign of a vitamin A deficiency is often poor sight at night. Overview. Vitamin K is a fat-soluble vitamin, so your body stores it in fat tissue and the liver. It is best known for its role in helping blood clot, or coagulate, properly. The K comes from its German name, Koagulationsvitamin. Vitamin K also plays an important role in bone health. It is rare to have a vitamin K deficiency
http://www.cancerresearchuk.org/about-cancer/cancers-in-general/treatment/complementary-alternative/therapies/laetrile http://www.nytimes.com/health/guides/nutrition/vitamin-a/overview.html http://umm.edu/health/medical/altmed/supplement/vitamin-k http://www.nytimes.com/health/guides/nutrition/vitamin-a/overview.html http://www.nytimes.com/health/guides/nutrition/vitamin-a/overview.html http://www.whfoods.com/genpage.php?tname=nutrient&dbid=109 http://www.rxlist.com/vitamin_a/supplements.htm http://umm.edu/health/medical/altmed/supplement/vitamin-a-retinol http://umm.edu/health/medical/altmed/supplement/vitamin-k
alternative names for vitamin a