I have not tried any product to helps purify my scalp before shampooing so I didn’t know what to expect. But it was especially very effective in removing build up. I wasn’t so sure if it was working as first, after a week of using, I noticed that the dry bits that make my hair look like dandruff is clearing significantly. However, I must mention the smell of this treatment, it’s quite sour like cider, so keep it in mind if you’re sensitive to strong smell. Other than that, it’s perfect for my oil scalp buildup.