As the saying goes, "The length of life is known by looking at the hair", what is the scientific basis for this sentence?

對於大多數人來講，每天起床之后做的第1件事就是洗臉梳頭，然而在梳頭的過程當中，很多人都會發現自己的頭髮會出現大把脫落的情況，於是便會心生不安，害怕是身體出現了疾病，有些人甚至擔心自己活不長了。之所以會出現這種情況，也與老輩人的想法有關。很多人都聽家裡的長輩說過這樣一句話：“人活多久，看頭髮變知”。

This sentence is to tell us the healthy state of our hair, which is closely related to our physical health. Some people think that this sentence is just a feudal superstition, don't believe too much, but it turns out that this sentence is not superstition, but has a certain scientific basis, the length of a person's lifespan, can indeed be reflected through the hair, for people with a longer lifespan, their hair usually shows these characteristics. What are the characteristics? Let's give you a brief introduction.

1. What are the characteristics of healthy hair?

1. The color is bright.

A large part of the nutrients in the food we consume in our lives are absorbed by the hair, and when our body is kept in a healthy state, the hair will also show a natural shine. Especially when the sun is shining, this shine will be more intense. The main reason for this is that the oil in the hair is evenly distributed. If the body is in a sub-healthy state, the hair may show a variety of problems such as dullness, dryness and splitting.

2. Soft texture.

Healthy hair is usually soft to the touch, which is a sign that hair is particularly nutritious. If the texture of the hair is particularly hard to the touch, then there may be a problem with the body, but there is also a possibility that it is caused by too many perms and dyes, after all, these hair dyes contain a lot of chemical ingredients, which can also destroy the softness of the hair.

3. Fast growth speed.

We often find that in the process of combing our hair, we don't know when a lot of broken hair has grown on our head. In fact, this is also normal, because hair is also a part of our body, and it also needs to go through metabolic processes. Every day there will be hair loss, there will be new hair growth, according to research: healthy hair will increase by at least 25.0 cm per month, if you find that your hair is falling less and less, and no new hair grows, then you need to go to the hospital for a check-up.

2. How to alleviate the troubles caused by hair loss.

I believe that many people have experienced, or are experiencing hair loss, if you just lose a few hairs, there is no need to pay too much attention, after all, this is the normal metabolism of hair, but if it is a lot of hair loss, you need to pay attention, it may be because of lifestyle or diet problems.

In this case, we need to adjust our lifestyle and try not to stay up late. In terms of diet, it is best to keep it light and not eat too much spicy and greasy food. If, after adjustment, it is found that the situation does not improve, it is necessary to consider that the disease is responsible.