We rounded up the best tea tree shampoo, because we’ve long sung the praises of tea tree oil. It's a superhero ingredient for a variety of skin and hair care products, because the essential oil is ...

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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.

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.