Every hair treatment looks like it is failing at week six

Hair grows in cycles, and at any moment your scalp holds follicles in several different phases at once. Treatments that work by pushing resting follicles back into active growth have to end the resting phase first. Ending it means the old hair, which has been sitting in place doing nothing, finally lets go.

From the outside this is indistinguishable from getting worse. More hair in the drain, more on the pillow, at exactly the moment you were hoping for the opposite. The people most likely to quit are the people for whom the drug is doing precisely what it is supposed to do.

This is not a reason to persist with something that is genuinely not working. It is a reason not to judge in week six.

The discipline that makes this work is boring and non-negotiable: one variable. If you start a topical, change your shampoo and begin a supplement in the same month, you will reach week sixteen with a result you cannot attribute to anything.