Sorbitan monostearate is an ester of sorbitol and stearic acid, which is commonly used as an emulsifier in food and personal care products. It is a white or yellowish waxy solid that is soluble in water and alcohol.
In protein powders, sorbitan monostearate is often used to help stabilize the mix of ingredients and prevent them from separating. It works by forming a protective barrier around each droplet of oil or fat in the mixture, preventing them from coalescing and maintaining a smooth and homogenous texture. Additionally, it can improve the volume and texture of protein powders, giving them a more creamy mouthfeel.
Sorbitan monostearate is generally considered safe for consumption and use in personal care products when used in accordance with the established limits. However, individuals who are allergic to sorbitol or stearic acid should avoid products containing sorbitan monostearate. Additionally, it may not be suitable for individuals on a low-fat diet, as it is a fatty acid derivative.