Triethanolamine is not automatically unsafe for seborrheic dermatitis, but it is context-dependent because concentration and final formula quality matter. It is often used to adjust pH or help build an emulsion rather than to act directly on the skin condition.

The raw ingredient should not be treated as equivalent to the small amount present in a finished, balanced product. Irritated skin may still react to the complete formula, and the checked sources give no treatment or Malassezia effect. Stop if discomfort repeatedly follows use.