What are some good treatments for dandruff?

Multiple: Dandruff is common, so common in fact that there are commercials on tv for it. Control is key here, as there may be no cure (just like there is no cure for hunger- eat and 6 hours later you'll be hungry again). I suggest people alternate dandruff shampoos, (t-gel, t-sal, head & shoulders) and let them sit on the scalp for 5 minutes prior to washing off (or if the scalp feels like it's burning.).

Dr Ali and another doctor agreed

Dandruff: Dandruff is a common scalp condition in which small pieces of dry skin flake off of the scalp. If you have dark hair or you’re wearing dark colors, you may notice the flakes in your hair or on your shoulders. Dandruff may also make your scalp itch. https://www.aad.org/public/skin-hair-nails/hair-care/how-to-treat-dandruff