If you've ever wondered how often you should shampoo (用洗发剂洗) your hair, you're not alone. While many people prefer to wash their hair daily, others think that once every few days is best. But that still leaves us with the very important question - how much is too much?
When you wash your hair with shampoo, the surfactant (表面活性剂) in the shampoo mixes with water and works to clean dirt and oil from your hair. Although clean hair is definitely a good thing, frequent shampooing can lead to some problems such as split ends (发梢开叉) and dull hair.
Most people who wash their hair every day say they do it to avoid a build-up of oil. But in fact, skipping a wash is the best way to prevent oil from building up. Most often the oily substance in your hair doesn't come from natural oil but from the products you use for treatment and styling.
Actually, how often you should shampoo your hair depends on your hair type. People who sweat a lot or live in a humid area may need to shampoo their hair more frequently. If your hair is oily, you should try to use a shampoo that is specially designed for oily hair.
Since thicker hair collects less oil, it'll need less washing. Anyway, the best way to know how often to wash your hair is to experiment. As long as you don't have scalp (头皮) problems, you can wash your hair once a week.
A. It is evident that shampoo can be harmful to your hair.
B. Oily hair, on the other hand, is more difficult to deal with.
C. Washing your hair every day can be costly and unhelpful.
D. It's a question that has been bothering thousands of people.
E. In addition, dry and curly hair can often be left unwashed for days.
F. You may notice some changes if you start skipping washing your hair.
G. To answer that, we first need to understand what happens when you wash your hair.
