Even the fanciest shampoo cant permanently change your hair

Washing your hair with the right shampoo is like a great exercise program: As long as you do it youll look good, but if you quit, three months later youre back to where you started, says Pelusi. a small amount of the shampoo product is smeared onto a plate and inoculated with bacteria and other organisms to see if they grow. Additionally, the packaging is also checked to see if it meets specifications. Things such as bottle thickness, appearance, and bottle weight are all checked.