After the hair follicle "breaks the skin", it will become a hair shaft, that is, the part of the hair exposed on the scalp surface. Hairshafts are dead keratinocytes, which have no metabolism and certainly do not consume nutrition.

In other words, only healthy hair follicles need to consume certain nutrients when growing, while other parts of the hair will not consume nutrients. No matter whether the hair is long or short, healthy hair follicles will grow hair "regularly and quantitatively"

Therefore, long hair will not increase the nutritional needs of hair growth. Moreover, compared with physical development, brain development and nutritional consumption of pregnant fetus, the nutritional demand of hair follicles in the head is minimal.

Extended data:

Food with long hair:

1. Staple food and beans: Eat more foods rich in cystine and protein, such as black rice, oats, gluten, corn, black beans and soybeans, as well as tofu and bean products containing high-quality protein and B vitamins.

2, meat, eggs, milk: eat more iron-rich foods, such as animal liver, egg yolk, sesame seeds, kelp and so on. ; Beef, fish, milk and eggs are also good sources of high-quality protein and B vitamins.

3, vegetables: eat more iron-rich fungus, day lily, alfalfa, mustard, red cabbage moss, celery, amaranth, sesame, kelp and so on.

4. Fruits: Vegetables and fruits that can be eaten more include carrots, onions, strawberries, mulberries, apples, pears, apricots, kiwis, watermelons and melons.

References:

People's Daily Online-Secret: Did the older generation say that "long hair grabs nutrition" is scientific?