How does shampoo work?
Shampoo contains surfactants that produce a rich lather, trapping and removing oil from the hair. Some shampoos may even contain ingredients that can fight dandruff or fungal infections of the scalp and provide extra benefits, although these should be used as directed by a dermatologist.
By cleaning the scalp, shampooing can promote hair health by:
- Combatting hair odor
- Soothing an irritated scalp
- Preventing and treating dandruff
- Making hair soft, shiny, and manageable
However, shampooing too frequently can also damage your hair by stripping it of natural oils, which can dry out your hair and make it brittle. That’s why some people choose sulfate-free or moisturizing shampoos, although there is little evidence that sulfate-free shampoos are less harsh than regular products.
A well-formulated, mild shampoo will not interfere with hair growth and can help increase the strength of your hair.
How to shampoo your hair correctly
Shampoo more often if you notice that your:
- Hair is oily
- Scalp is sweaty or itchy
- Hair is rough and dry
Shampoo less often if you notice that your hair:
- Is dull and shedding
- Feels dry
More tips for healthy hair:
- Always use room temperature water to shampoo your hair.
- Use a small amount of shampoo and massage it gently on your scalp.
- Let the shampoo run through your strands but avoid applying too much to your ends.
- Never skip conditioning your hair afterwards.
- Avoid heat drying your hair whenever possible and let it air dry instead.