The only thing that works for me against eczema and other scalp issues. At times I wash my hair several times a week, other times only about every 10 days. It works just as well regardless, without the scalp getting angry. Smells faintly of soap, no other scent, which I appreciate.
Tips:
Works best with a pump bottle due to its runny consistency.
Wash hair twice. The first time, practically nothing happens. The second time, it creates a rich lather.
Not suitable for hair that gets greasy quickly.