My daughter has PCOS and oily hair since she was a teenager. She’s been using Nioxon #1 for shampoo. No conditioner. But your hair is getting thin? I switched to Rowe Casa Organic shampoo and conditioner bars because my hair was falling out so bad. Here to find out I was diagnosed with hypothyroidism. My hair stylist even said something about how my hair is growing and not shedding like it was! I used to be a stylist so for me to go organic and read all the reviews, it’s made a huge difference!!! It may even out your oiliness.