Hydroxypropyl methylcellulose is a modified form of cellulose, which is a natural substance that is found in plants. It is often used as a thickening agent, emulsifier, and binder in a variety of food and pharmaceutical products, including some protein powders.
In protein powders, hydroxypropyl methylcellulose may be added as a thickening agent to help improve the texture and consistency of the powder. It may also be used as a stabilizer to prevent clumping and as a binder to help hold the ingredients together.
Hydroxypropyl methylcellulose is generally considered safe when consumed in recommended amounts. It is not absorbed by the body and passes through the digestive system intact, making it an effective ingredient for promoting satiety and regulating blood sugar levels. It is commonly used in weight loss supplements and as a dietary fiber source.