Q: I recently read an article that warns that soy milk is a rip-off and contains a lot of bad stuff. It advises making your own soy milk using soy beans, water and a soy milk machine. Is commercially available soy milk unsafe? If so, what do you recommend?
None of these sensational claims has ever been proven.
Remember, for centuries Asians have been eating lots of soy foods, and the supposed terrible consequences of soy consumption haven't materialized among them. In fact some traditional soy-rich Asian diets are associated with lower risks of breast and prostate cancer
than western diets.
Based on the weight of available evidence, I remain convinced that soy is safe and nutritious when eaten in relatively whole and unrefined forms in reasonable amounts. I recommend one to two daily servings, which can include a cup of soy milk, a half-cup of tofu, tempeh or green soybeans (edamame) or roasted soy nuts. Soy milk provides all the benefits of cow's milk, without the butterfat, which is unhealthy, the milk protein (casein), which can increase mucus production and irritate the immune system in some people, and milk sugar (lactose), which can cause digestive distress if you lack the enzyme that breaks it down.
Soy milk is made by soaking dried beans in water, grinding them, heating them in water, pressing them and straining the milk. Soy milk makers for home use are widely available, and people who use them say fresh, homemade soy milk is much better tasting than packaged products. And it will have no additives.
One cup of soy milk contains 4 to 10 grams of soy protein, and 20 to 40 mg of isoflavones, plant chemicals that may act like estrogen but probably account for soy's protective effect against hormonally driven cancers (especially when soy is part of the diet from early childhood). While soy milk is high in calcium, it doesn't have as much as cow's milk, so it is important to look for a brand that is fortified with calcium.
I recommend certain precautions when buying soy milk. Since many soy crops are heavily treated with pesticides, always buy organic soy products. I also recommend avoiding brands of soy milk that contain the thickening agent carrageenan, a seaweed derivative, which I believe may be harmful, especially to the intestinal tract. If you are watching your weight, look for low-fat products.
"Ask Dr. Weil" does not provide specific medical advice and is not intended as a substitute for the advice provided by your physician or other health-care professional. You should always consult your physician to discuss specific symptoms and conditions.
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