Dopends where you go
shampoo going in your eye and much more...
It depends on the make of the shampoo it shouldn't be to much unless you go for the top quality professional stuff
Different prices.
Shampoo can remain in your hair if not properly rinsed out because some ingredients in the shampoo can be sticky or cling to the hair shaft. It's important to thoroughly rinse the hair to ensure all residual shampoo is removed. Using too much shampoo or not rinsing it out completely can also contribute to shampoo build-up.
Different prices.
5
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You lose so much hair when you shampoo is because your old hair gets washed away from your head
The shampoo bottle will give you the dilution instructions. It will also say what area it will treat.
The telephone was Invented by Alexander Graham Bell 1874. Much before the shampoo
It's not good to use shampoo too much because it can dry out your hair.
Cheaper shampoo has more water than the expensive shampoo, making your hair greasier much quicker. If you turn the shampoo bottle around and read the ingredients and the first one is Water, then you know it won't do much for your hair, so look for one that has the first two ingredients without water.