The Obagi Blue Peel is a type of chemical peel that uses Trichloroacetic acid (TCA) as the main ingredient. The concentration of TCA in an Obagi Blue Peel typically ranges from 15% to 30%, depending on the severity of the skin condition being treated. The Obagi Blue Peel can be effective in treating mild atrophic acne scars. The peel works by removing layers of damaged skin, promoting the growth of new, healthier skin. The process can help to reduce the appearance of acne scars. However, the effectiveness of the Obagi Blue Peel (or any chemical peel) can depend on various factors, such as the depth and severity of the scars, the individual's skin type, and how well they follow post-peel care instructions. While the Obagi Blue Peel can be effective, a standard TCA peel may also be a good option. TCA peels, especially those with higher concentrations, can penetrate deeper into the skin and may provide better results for some individuals. It's recommended to consult with a dermatologist or a skin care professional before starting any chemical peel treatment. They can assess your skin condition and recommend the most suitable treatment for you. Remember, each individual's skin responds differently to treatments, and what works best for one person may not work as well for another. It's also crucial to follow all post-treatment care instructions to ensure the best possible results and to avoid potential complications.