Also known as hydrolyzed plant protein (HPP), this mystery ingredient may be made from wheat, corn, or soy and will often show up in foods that require added flavoring such as gravies, sauces, and soups. Be watchful of this ingredient in restaurants that use pre-made mixes for making their foods. The FDA asks food manufacturers to disclose the vegetable or plant used, so if you see “hydrolyzed wheat protein” on the label you can put the product back. But if you see corn of soy in front of protein, it should be safe.
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