Does heating soy protein supplements in food destroy any of its benefitial effects?
Many soy protein supplements contain soy protein isolate, which has already been heated during its preparation and processing. Heating it in your oatmeal will not do it any harm as a protein source. Protease inhibitors present in raw unheated soybeans are not present in a processed product. In any case, destroying them only improves the utilization of the protein by the body. The amount of heat requires depends on a number of factors, such as initial amount present, type of heat (wet or dry), type of product (liquid or solid). The only soy products that would contain measurable protease (trypsin) inhibitors are raw dry soybeans and raw soy flour, neither of which are widely sold or consumed. One producer recommended three tablespoons of their product, which is what they recommend on their website (the package states that one tablespoon is a serving), provides 42 grams of protein, more than half the recommended amount for an adult woman. Even if you are using this as a meal substitute i
