Questions, answered
Short answers, with links to the full guides.
Purple shampoo
A shampoo that is purple or violet in color. Makers describe it for blonde, bleached, or gray hair that looks yellow or brassy. We have not tested any product.
We do not give a time. Follow the label directions.
Washing
The AAD says to wash your hair based on how often it gets dirty or oily.
The AAD says to use conditioner after every shampoo.
Labels
We make no such claim. We do not say a free-from label makes a product safer or better.
The FDA says it depends on intended use, and that an antidandruff shampoo is both.
Testing
We suggest it. For a product you would wash off, like a cleanser, the AAD skin care steps use a quarter-sized test spot for five minutes, or as long as the instructions say, twice daily for seven to 10 days.
The FDA says to do a patch test every time before dyeing your hair.
About us
No.
No. Prices are set by retailers and makers.
No. Our guides are general information. See a doctor or dermatologist about scalp problems or hair loss.
Some links may be affiliate links.
Before you use a new product
General information, not medical advice. Follow the label. We suggest testing a new hair product on a small patch of skin first. Keep it out of your eyes, and stop use if irritation occurs. For hair dye, the FDA says to do a patch test every time and never to dye your eyebrows or eyelashes. See a doctor or dermatologist about scalp problems or hair loss.
