Most doctors don't support this idea, because it tends to take away their control of things. And if you don't think the name of the whole game is Control, just observe any TV channel with a stopwatch and tell me how long you can sit there without someone telling you to take some type of medication. Your job is to need as many drugs as possible between now and the day you die. Their job is to sell them to you. This has to do with pharmaceutical economics.
Health is an entirely different topic altogether.
Dieticians and nutritionists go to all this trouble categorizing foods according to content, telling you that this food has so many mg. of calcium, that one has so much protein, or they talk about calories, or food combining, or eating for your blood type, or some Zone, or any number of trendy notions. But it actually matters much less what's in the food than how much of the nutrients eventually ends up in your cells. If the food was never broken down in the tract, well then, it went right through you. Or worse, it's still in there. Whole food enzymes can be the key to health, without changing one single other thing.