I Haven’t Used Shampoo In Days and My Hair Feels Fuller

I have the same type of hair loss as my father. My father suggested not using shampoo, saying that his hair loss was better after not using it. I haven’t been shampooing for two days, and my hair FEELS thicker and fuller, but I’m not sure if that’s just a placebo effect.

Will NOT using shampoo cause more hair loss, because of sebum build-up etc?

If you don’t wash your hair, you will build up grease and grime from the environment, as well as wax from the glands located in each hair follicle which secrets sebum. Your hair may appear thicker as the grime builds up, but this will not impact hair growth one way or the other.