While there is abundant research showing sodium lauryl sulfate is a sensitizing cleansing agent, there is no similar supporting research for TEA-lauryl sulfate. However, because the relationship between the two is so close, I decided to recommend against using either of them. The basis for this is a judgment call, made from a desire to protect skin from sensitization; however, there are no specific studies I can cite for this recommendation, although there are those who will understandably disagree with my conclusion. See sodium lauryl sulfate