con artists claim their product promotes hair growth, ask yourself
how much hair growth exactly? Potentially they could mean the growth
of a single hair fiber. Perhaps they mean a cosmetically unacceptable
vellus hair growth (baby hair). If they claim hair regrowth for
their product find out what kind of regrowth, what type of hair,
how quickly does it grow, what area it grows in, how dense it is,
and how long it lasts.
Most clinical trials for hair growth drugs will involve statistical
evaluation. An area of scalp is selected and then the hair density
and growth rate is monitored throughout the study. This information
is compared to results for other people and it is also compared
to a control group that received a placebo to obtain a true statistical
evaluation of the product. All of this generates a lot of statistical
data at least some of which should be available to the consumer.