Shampoo.

"Niserol shampoo is great. It's super affordable. It can help with dandruff and hair thinning. And if you have dandruff and hair thinning, this is the single best thing I think you could have in your routine. The main downside of ketoconazole shampoos is that they tend to be kind of drying, so I really try to focus it just on my scalp and avoid it really getting washed up in my mid-lengths and ends. You do want it to sit on your scalp for a little while, so I like to make sure I focus it on the roots and massage it there and then let it sit for 2 to 3 minutes."