BHT is generally a lower-concern cosmetic ingredient for seborrheic dermatitis at the uses and concentrations assessed. Its main job is to slow oxidation in the product, not to treat inflammation, scale or Malassezia on skin.

A formula containing BHT can still be irritating because of other ingredients, and personal tolerance is never guaranteed. The checked sources give no yeast-specific reason to change the rating. Judge the finished product by how it performs rather than by BHT alone.