Depends on your physical makeup and what kind of shampoo you use. Also, daily shampooing (or more) can be harmful. I have a friend who is OCD. He washed his hair too much, got propecia and lost about half his hair. He brushed his teeth so hard he tore up his gums and was threatened with gum surgery if he didn’t cool it. He walked so far every day for his “health” that he ruined his feet and had to slow down on that too. He can’t lift weights because he overdoes it and hurts himself.
Moderation in all things is the way.
My father in law has OCD too & the dentist told him to chill on the multiple brushing & flossing.