Final answer:
Salicylic acid is a new ingredient with anti-inflammatory and antibacterial properties that is often included in acid peels and can treat mild acne.
Step-by-step explanation:
The new ingredient with anti-inflammatory and antibacterial properties that is often included in blended acid or designer acid peels is salicylic acid. Salicylic acid helps to remove old skin cells and has anti-inflammatory properties that can treat mild acne. It can also be found in over-the-counter products for acne treatment.