Sorbitan esters, such as sorbitan monostearate and sorbitan monooleate, come from sorbitol and fatty acids. Manufacturers use them as emulsifiers to blend oil and water in processed foods, cosmetics, and pharmaceuticals.
These compounds are not dietary supplements. They show up as inactive ingredients in some capsule or tablet formulations, where they improve texture or stability. No evidence supports any health benefit from taking sorbitan esters on their own.
When they appear in food, levels stay low and regulators consider them safe. High doses, though, can lead to digestive upset like gas or diarrhea because the body partially breaks them down into sorbitol.