Testing is extremely important. Anytime we conduct a test, be it at the track or on a dyno, two things come to mind. One is a tech column Bob Bolles wrote a while ago about all of us being scientists.

How do you know your hair is strong and healthy? Most of us believe that no hair loss is a sign of healthy hair. However, that's not true. Losing up to 50 to 100 hair every day is pretty normal and is ...

Please provide your email address to receive an email when new articles are posted on . A hair pull test should have normal values reduced to two hairs or fewer and the current 4- to 5-day restriction ...