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Well, in spite of the attention-grabbing headline I made before, a little soy is OK. The problems happen in men with vulnerable sex-hormone synthesis who eat a lot of soy -- a couple pounds of tofu a week, plus soy nuts, plus tempeh, plus soymilk. It is a similar situation to the development of male-pattern (abdominal) obesity and prostate enlargement. Mary Enig, the scientist who first brought the dangers of trans-fats to public attention, has been working on the problems -- and uses -- of soy protein products.
Second, while you don't need a huge amount of protein, it does NOT appear that reasonably large amounts of it hurt you. For years, John Gray and company have been telling people that protein will leach the calcium out of their bones, but the studies they cite are fairly old and have serious experimental flaws. Follow-up and replication studies show no such effect. Unless you have kidney disease, you don't have to worry about tweaking your protein to keep it low.
The customary rule of thumb is 1 gram of protein per pound of body weight. You can cut that down a little if you're losing weight and staying active. But there is little reason to keep your protein as low as possible. Even a vegetarian can get enough protein through careful meal planning -- you'll need to supplement for B12, and supplementation will also make it less necessary to plan your eating in painful detail.
My own protein supplement is just the garden-variety whey protein. I usually mix it with powdered milk and substitute two meals with it. It allows me to keep a low enough level of calorie intake to produce weight loss, but inhibits protein loss that low-calorie diets usually promote. (I'm also pretty active physically.) The stuff is relatively tasty, healthful, and cheap. It mixes easily with powdered milk, juice, or even with water -- I just use a spoon to stir it instead of using a blender or a shaker. A tablespoon of corn starch makes it fairly thick, and I'm looking for some food-grade guar gum to replace that with.
I never heard of Isopure or BSA, but the heavily branded and marketed "precision engineered performance foods" tend to be way overpriced. Whey isolate powder, and even soy isolate powder, are pretty basic foodstuffs.
Most athletes, and even most people into healthful eating, don't eat nearly enough vegetables. If you're like most people, you could probably stand to eat more. Get some recipes that sound good and try some of them. The same thing could be said for fruit, but some people (like Yours Truly) can't eat very much of it.
I'm not a doctor, but this is all pretty basic food advice, none of it original or novel. Education is the best over-all medical treatment you can get. Good luck!
--bkl
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