"Type 1 hair is the only one that doesn’t have subcategories because there’s no texture to it whatsoever," says Cynthia. It has absolutely no curl pattern, and it needs the least amount of attention.
However, if your hair is on the thinner side, like Victoria Justice's, it has to be washed the most often. "Your scalp produces lots of natural oils and sebum, and because there’s no curl pattern to the hair, the oil just leaches all the way down to the ends," Cynthia adds. It's a double-edged sword: your hair is more moisturized and soft, but it gets oily so quickly you can't go a day without shampooing.
Product recommendations: Use a clarifying shampoo, like Alterna Bamboo Style Deep Cleanse Clarifying Shampoo ($22), often to remove that extra buildup from oils that have nowhere to go. Dry shampoo is your best friend, as is volumizing shampoo, because superstraight hair tends to be flat. Try Living Proof Perfect Hair Day Dry Shampoo ($22) and John Frieda Luxurious Volume Touchably Full Shampoo ($2).
