Verkkotea tree oil is a workhorse ingredient for the hair and scalp. Here, we've rounded up the best tea tree shampoos for the healthiest head of hair. Verkkotea tree oil shampoos are among the most popular dandruff shampoos on the market today. Out of the 110 shampoos we’ve reviewed, tea tree. Verkkobecause of tea tree oil's antimicrobial properties (antifungal and antibacterial), the benefits of tea tree shampoo include combating dandruff and.