Thanks to its many positive qualities, tea tree oil is an oft-used ingredient in a variety of beauty products, including shampoo. The naturally antibacterial oil deeply cleanses the hair and scalp.

Trader Joe's has a beauty section with skin care, hair care, and body products. INSIDER's Caroline Aghajanian put $50 worth of its beauty products to the test for one week to see how they work.

I’ll let you in on a secret: shampoo is not the devil. I know, I know. If you’re a fellow naturalista you’ve probably been told countless times about the horrors of shampoos and how they dry out your ...