William T. Jarvis, former professor of public health, founder of the National Council against Health Fraud (www.ncahf.org):
“Enzymes are complex protein molecules produced by living organisms exclusively for their own use in promoting chemical reactions. Orally ingested enzymes are digested in the stomach and have no enzymatic activity in the eater.”
Andrea Giancoli, R.D., a spokesperson for the American Dietetic Association:
“Enzymes are proteins and proteins denature with heat, but those enzymes are denatured - and thus inactivated - when they reach our stomachs. Our stomach acids are designed to break down proteins very efficiently.”
Vitamins are a group of substances that are needed for normal cell function, growth, and development. There are 13 essential vitamins:
- Vitamin A (retinol, retinal, 4 carotenoids)
- Vitamin C (ascorbic acid)
- Vitamin D (D3 - Cholecalciferol, D2 - Ergocalciferol)
- Vitamin E (tocopherols, tocotrienols)
- Vitamin K (phylloquinone, menaquinones)
- Vitamin B1 (thiamine)
- Vitamin B2 (riboflavin)
- Vitamin B3 (niacin)
- Vitamin B5 (pantothenic acid)
- Vitamin B6 (pyridoxine, pyridoxal, pyridoxamine)
- Vitamin B7 (biotin)
- Vitamin B9 (folic acid)
- Vitamin B12 (cyanocobalamin)
Fat-soluble vitamins are stored in the body's fatty tissue: vitamins A, D, E, K.
Water-soluble vitamins - the body must use almost all water-soluble vitamins right away - vitamins B1, B2, B3, B5, B6, B7, B9 and C.
Vitamin B12 is the only water-soluble vitamin that can be stored in the liver for many years.