MINNEAPOLIS (WCCO)-- Most of us start our day with a rinse, lather and repeat. Americans spend approximately $4 billion on shampoo every year. But does it matter if we use cheap or expensive shampoos?

And does "expensive" really mean "better"? Begoun says you shouldn't spend more than $6 on a shampoo. Begoun says, "There is absolutely no difference between expensive products and inexpensive ...

The cheapest shampoo (costing about £1 per bottle) left one student with a small static charge on the shafts of their hair, which quickly attracted dirt and dust back onto the surface.