In one study, researchers found that tea tree oil was as effective at treating acne as benzoyl peroxide, and it didn't result in the peeling and redness that the peroxide sometimes causes. Consumers and experts have worked to find a solution for years, but it wasn't until recently that they found the right combination of ingredients to do so. It's fair to say that with rosehip oil, you only need a small amount to make a big difference, when applying your oil, all you need is a couple of small drops.