What is the nature of dry and dehydrated skin?

(Material from the Internet)

One. The stratum corneum barrier is damaged

In fact, there is no shortage of good skin care products on the market now, what is missing is professional skin care knowledge. So, before hydrating and moisturizing, we must first understand one reason why our skin "leaks".

In general, our skin is neither leaking nor dehydrated. This is because it comes with a powerful moisturizing system that locks in moisture firmly! The main line of defense of this moisturizing system is the stratum corneum, and in the epidermal stratum corneum, the sebaceous membrane and the stratum corneum lipids are damaged, which will lead to skin "leakage"

1. Damage to the sebaceous membrane:

The main components of sebaceous film are squalene, wax lipids, triglycerides, and cholesterol.

Many skin care products on the market are actually by adding these ingredients to achieve the effect of moisturizing

The sebaceous film acts like a natural protective film to prevent water leakage

So why is this "protective film" destroyed?

The main reason is: excessive cleaning

For example, using a facial cleanser that is not suitable for your skin type, washing your face several times a day, rubbing hard and so on...

2. Stratum corneum lipids:

If the sebaceous membrane is likened to a city wall, then the stratum corneum lipid is the cement in the city wall

The main ingredients are ceramides, cholesterol and fatty acids

So why is the lipid film destroyed?

Excessive degreasing, frequent physical friction, excessive brushing of acid.....

Excessive degreasing: That is, some cleansing products on the market have too strong degreasing function, not only washing off the sebum film, but also removing the stratum corneum lipids together

For example, if there are only bricks and no cement, can such a wall not leak?

Violent friction: Like violent scrubbing, whether it is a towel or a hand, or a cotton pad

The price is that the stratum corneum is destroyed, and the skin becomes dry and desquamed.

Be aware that mature keratin takes at least 28 days to generate,

The stratum corneum is not yet mature, how can it retain moisture?

Brush acid: it is the use of products containing salicylic acid, fruit acid and other ingredients to dissolve, loosen and peel off the keratin

Brush acid is usually a large oil skin, if it is a dry skin, it is leading to skin allergies, serious disfigurement

Two. Basal layer cells renew slowly

With the rapid development of information, facing efficient and busy work, busy and busy life, tense and high-pressure modern life, staying up late, makeup, dust, exposure... Let our skin suffer to the end, cellular metabolism is not natural is an unhealthy state.

And cellular metabolism here needs to talk about the metabolism of the skin

So what is the metabolism of the skin?

Metabolism is a process of constantly renewing and alternating old and new cells, and skin metabolism is the process of constantly growing new cells in the basal layer, and then pushing upwards to replace the outermost stratum corneum of the skin.

The metabolic cycle of the skin, popularly and standardly considered to be the outermost stratum corneum, is 28 days, a newborn cell moves from the base layer to the transparent layer, it takes 14 days, and the stratum corneum is formed to shed, it takes 14 days. So the cycle of metabolism is 28 days. Metabolism is carried out every day, but it is most active every night from 10:00 to 2:00.

So what causes the metabolism of the skin to slow down?

1. Increasing age

As age changes, metabolism slows down and cycles gradually extend to 60 days. The various contacts between the skin and the outside world naturally age the tissues of the dermis layer, the new cells gradually slow down, the collagen produced is less and less, and the metabolic cycle will be longer and longer

So this is why the older the age, the skin's absorption capacity declines, the same product is used for 28 days, some people are 45 days to see the effect

2, irregular diet, stay up late, weight loss, stress, etc

What is the relationship between slow skin metabolism and dry skin and lack of water?

1, slow skin metabolism will lead to the accumulation of old keratin of the skin on the surface, which will lead to the skin to feel particularly rough, will also affect the melanin metabolism, pores are also easy to block, the absorption of nutrients of hydrating products is naturally affected

2, the basal cells to form new cells upward process will form a natural moisturizing factor, skin metabolism is slow, the formation of moisturizing factors is reduced, the skin is dehydrated and dry will secrete a lot of oil to protect the skin, and eventually lead to skin water and oil imbalance or dryness and sensitivity

3. How to enhance the metabolism of the skin?

1, maintain the moisture content of the skin: moisture is the basis of skin metabolism, so that the skin to maintain sufficient moisture, the waste in the skin and melanocytes can be metabolized

2. Regular exfoliation: Regular exfoliation can help peel off discarded keratin, accelerate skin metabolism, improve roughness, and make the skin smooth and delicate.

Three. Collagen loss

5% of the skin composition is the epidermis, 95% is the dermis, and the main component of the dermis is collagen, collagen constitutes a fine collagen elastic network, which firmly locks the moisture in the skin, builds a well-hydrated "skin reservoir" (dermal reservoir), continuously supplying water to the epidermis, feeding, and nourishing the epidermis.

Menstruation, fertility, breastfeeding, ultraviolet damage, climate change so that women's skin in the collagen from the age of 20 began to lose a large number of, collagen elastic network rupture, resulting in the "skin reservoir" bursting embankment, a large amount of water loss, skin moisture content decreased, especially in the dry autumn and winter, if the skin reservoir is dehydrated, a variety of skin problems will follow.

Therefore, the work of locking in moisture is particularly important

Moisture is an indispensable substance to ensure the beauty of the skin, more than 95% of the moisture in the skin is stored in the dermis, and the moisture is locked by the collagen elastic network formed in the skin.

Applying external moisturizing products can only temporarily increase the water content of the epidermis within 1-2 hours, which cannot solve the problem of internal water deficiency of the skin, and the fundamental way is to supplement the skin of the whole body with enough collagen through oral administration, firmly lock the moisture in the dermis layer, and ensure that the "skin reservoir" does not break the embankment.

Once the dermis layer is well hydrated, it nourishes the epidermis from the inside out, leaving the skin silky, delicate and moisturized