- Tea tree oil is the latest acne-fighting ingredient, lauded for the calming and anti-inflammatory effects that help it soothe blemishes. - Our top pick is The Body Shop Tea Tree Oil, a multiuse, vegan oil that can be applied as a spot treatment to diminish breakouts and redness. With so many ingredients claiming to be "the ultimate acne fighter" it's tough to decide which one is worth the investment. Do you go for a salicylic acid or benzoyl peroxide spot treatment? A glycolic acid toner? All of the above? What's more, acne-fighting ingredients are often sensitizing to those with reactive...