Learn more about health with this collection
The importance of physical activity
The role of genetics in lifespan
How to maintain a healthy diet
Why shampoo?
Washing the hair is a lot like washing skin. Water can remove most visible dirt and debris, but might not eliminate odors or oily deposits. Shampoo helps water remove dirt, debris, and odors, such as smoke or sweat effectively.
Shampoo cleans the hair with chemicals called surfactants. These are soaps that remove surface debris from the scalp and hair. Many shampoos also contain compounds called sulfates, which produce a rich lather that removes oil from the hair. This can help the hair look cleaner, but it can also damage the hair.
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Oilier Hair
Very oily hair may look greasy a few hours after washing, particularly in the summer or after a workout. People with very oily hair might choose to wash their hair daily or every other day.
People with very oily scalps may develop acne
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It Depends
how frequently to wash hair depends on a person’s hair type, scalp texture, how oily the hair gets, and personal preference.
For some people, too-frequent washing can cause damaged hair and a dry, itchy scalp. For others, infrequent washing can make the hair look greasy and lifeles...
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Is shampooing ever medically necessary?
For most people, there is no medical need to shampoo at all, as rinsing with water can remove dirt and dandruff. However, some health conditions can benefit from regular shampooing.
People with parasitic infections of the scalp, particularly lice, may need to use special shampoos t...
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How often to shampoo your hair
The decision about how frequently to wash the hair is a cosmetic one based on personal preference.
For most people, shampooing the hair is not necessary for good health. Just rinsing the hair with water a few times ...
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