Hydrolyzed Soy Protein is generally a lower-concern ingredient for seborrheic dermatitis. It is broken into smaller protein fragments and used to support moisture, softness and hair feel, rather than supplying a fatty oil or acting as an antifungal.

No direct human seb derm or exact-name Malassezia evidence was found. People with a known soy allergy or a history of reacting to protein-based cosmetics may reasonably be more cautious, but the ingredient name alone cannot predict a skin reaction. Stop if itching, hives or redness develops.