Without waiting for Xu Yi to answer, the fat man remembered the report he had read before, and said directly: "Hehe, there is nothing impossible, women have to do many brainless things for the sake of beauty, and there are actually not a few strange things added to this mask." Then, the fat man asked Liu Liping with a strange smile: "Speaking of which, isn't the seed you painted on a strange thing?"

"Dead fatty, you are pointing at Sang and scolding Huai and saying that I have a brain problem, I will fight with you!" As she spoke, Liu Liping pulled out a pillow from behind her and smashed it into Yu Hangsheng's brain.

"The gentleman doesn't move his mouth, why are you like this, it's too spicy, it's just a shrew. ”

After all, it's a joke, of course the person who beat him knows that it's okay, and he naturally doesn't take it seriously when he is beaten, the fat man grinned and reached out to parry the pillow, but his mouth was not idle.

Liu Liping smashed her head and face on the fat man, and her mouth was still retorting: "I'm a woman, what's wrong with a shrew, at least it's still feminine!

After a few beatings, the fat man finally snatched the pillow in his hand, but he didn't fight back, just firmly grabbed the pillow and held it in his arms, saving Liu Liping from snatching it away again, so he said with a smile: "It's not too strange for you to say it, and some people even take raw meat to paste on their faces, and what's even more strange is that this person eats this raw meat directly in his mouth after putting on the mask, which is heavy enough!"

Liu Liping ran out of weapons, so she naturally stopped and sat down. After a few breaths, he said, "It's really just like you, it's disgusting enough to think about." ”

The fat man grinned and said, "This kind of thing is not a big deal." We have an old saying that a-helmet is buckled on the head, seriously. There are many people who paste feces and urine on her face for the sake of beauty, or drink urine to nourish her face!"

Hearing this, several people were stunned, Xu Yi even made up a woman with a stool on her face, and she couldn't help but feel goosebumps all over her body. "Isn't that brain-dead?"

The fat man said: "Queen Elizabeth liked to put a thick layer of white lead powder on her face, and became an example to all ladies. The older Queen Elizabeth gets, the thicker the powder, the more it resembles the sculpture on the bow of a ship that has been corroded by a storm. The ambassador of France once commented: "It is terrible to use white lead powder makeup to damage her teeth." "Also. She also used ochre and mercury sulfide to make rouge, and some of her maids even swallowed a mixture of soot, soot and butter. Those 'cowards' who are afraid that cosmetics are toxic try to wash their faces with their own urine. As for the number of people who drink urine, you can check it on the Internet, even in this era of scientific prosperity, there are a lot of people who do this kind of thing, and they can't be counted. ”

"I'll you, that's too tough, isn't it?"

"One of the most bizarre practices came from the Japanese geisha, who wore heavy makeup. The lead in cosmetics is very harmful to the skin, so they try to use nightingale feces to maintain it. Now some beauty experts say that this mask contains natural enzymes from nightingale feces. ”

Hu Yifei said: "Can this have an effect?"

Xu Yi thought for a while, then smiled and said, "It should have an effect." ”

Hearing Xu Yi say this, Liu Liping's eyes lit up. I couldn't help but ask, "Oh, really?"

Xu Yi nodded: "Nightingales mainly rely on eating insects for food, and this intake is naturally protein-based food. Presumably, the nightingale's urine will contain a lot of urea. ”

"Chicks don't pee, there's a way to do it. The nightingale also excretes urine through the guò cloaca, and when this feces and urine are mixed together, of course, a large amount of urea will be left in the feces. Urea is a small molecule substance. It can penetrate into the stratum corneum cells, which naturally speeds up the absorption of moisture by the skin. As for enzymes, this ethereal thing is more nonsense, so you don't have to think too much about it. ”

Hu Yifei nodded: "Uh, this turned out to be a natural 'urea ointment'? Is this also the effect of applying urine? It is better to apply urea ointment, at least psychologically it is easy to accept!"

The fat man glanced at Liu Liping, and said in a weird manner: "Can this be the same, urea is all synthetic, and what people want is pure natural and pollution-free!"

Thinking of what Liu Liping said before, Xu Yi suddenly laughed wildly.

After a while, Xu Yi wiped away the tears from the corners of his eyes, and then said, "Xiao Liu, don't be so weird, in fact, it doesn't matter what kind of mask you make." As long as you can achieve the purpose of hydration and have no toxic side effects, you can completely follow the principles of safety, hygiene, and affordability, convenience and accessibility, and don't mess up these things. Don't think that you can do everything with a face mask, in addition to hydration, basically making a mask will not be of much use. ”

Liu Liping couldn't help but retort: "Who said that the skin can absorb nutrients and moisturize." ”

Xu Yi sighed, it seems that there are really countless misunderstandings of this kind, what has this person seen.

Raising his head and looking at Liu Liping, Xu Yi said: "Xiao Liu, don't believe those advertisements, even your own personal feelings and visual effects, what beauty or cosmetics do you want to rely on to achieve the purpose of nourishing your skin, these statements are basically unreliable, all of them are nonsense!"

"Seriously, I haven't really studied cosmetics, but I've watched all the commercials on TV that are all sorts of effects, but it's basically not credible. These cosmetics applied to the surface of the skin must only change the color and luster of the skin surface, plus the basic functions of hydration and preventing water loss, what nourishes the skin, removes melanin and other claims are basically nonsense, and they are all unscientific statements. Subsequently, Xu Yi gave a result that surprised Liu Liping: "In addition to the use of anti-ultraviolet rays and covering makeup, even if you spend 20,000 yuan to buy a bottle of cosmetics, it can't fundamentally change the skin, and the effect it can have on the skin is no different from a bottle of alabaster bought for two yuan!"

Liu Liping shook her head and questioned, "No, the third child." You can't denigrate its effect even if you don't use makeup?"

Xu Yi smiled, pointed to the shops outside and said, "Look at this road." Many stores have cosmetics, which is enough to see how deeply the so-called "effect" of cosmetics really is deeply rooted in people's hearts. But I'm not a beauty industry practitioner. I also know the characteristics of the skin better than the so-called beauty experts, and there is no need to defend this lie. ”

Xu Yi continued: "The skin is the largest organ in the body, which wraps around the surface of the body. Essentially, the skin's primary function is the same: to protect and maintain the stability of its internal environment, and as a result of long-term natural selection, all its tissue structures and morphologies revolve around this. ”

Yan Peimin had an objection next to him: "Third child, what you said is a bit too much, I remember that dermatology textbooks also say that in addition to the protective effect, the skin also has the functions of absorption, secretion, excretion, sensation and regulation of body temperature." ”

Xu Yi smiled and nodded: "That's right." In addition, the book also includes immune response and immune monitoring functions. ”

Hu Yifei looked at Xu Yi and couldn't help asking, "Then you still say this, aren't you contradicting yourself?"

Xu Yi smiled and said: "It's a contradiction, but this has to be analyzed one by one, let's start with the sweat glands, in a sense, the skin actually doesn't have any excretory function, do you think there must be a problem when I say this, right?"

"That's not right. The skin has an excretory function, which can excrete excess salts and urea and other substances from the body. Liu Liping also retorted beside her, and then added: "Not only that, but the skin also has respiratory function!"

Xu Yi shook his head. "Indeed, the skin is not only made up of epidermal cells, but also various specialized appendages and tissues that naturally add other abilities to the skin. It's like a lot of people understand sweating as excretion. Even dermatology says that this is secretion and excretion, and in beauty and health care, it is said to be detoxification because the sweat discharged contains a very small amount of urea and other substances. Is that so?

"That's right!" Liu Liping said hurriedly.

Xu Yi said: "Actually, these are very far-fetched statements, and they are not very reliable. Subsequently. He asked a few people, "Generally speaking, the colder the environment, the less the human body sweats, and the hotter it sweats, the more it sweats, right?"

Seeing a few people nodding, he continued: "It can be said that the fundamental purpose of sweat secretion by the skin is only one: to reduce the temperature of the body surface, which is completely different from the purpose of excretory secretion of excess and harmful substances from the body by the kidneys and digestive tract. Sweat glands are secreted in a completely different way than other glands. ”

"To give you a few simple examples, the digestive tract can secrete various digestive enzymes involved in the digestion of food, and even the gallbladder can secrete bile to eliminate excess cholesterol and bilirubin from the body. However, the sweat secreted by the sweat glands basically has no other function except for cooling, and it does not participate in any metabolism in the body at all, let alone has a bactericidal effect such as the lacrimal gland. ”

It can be said that if the temperature does not affect the person's body temperature, then generally speaking, there will be no overt sweating, which is definitely not a necessary function of the human body. ”

"And the skin is completely different from the digestive tract or the kidneys or even the biliary tract, and those tissues and organs are still capable of recovering vital substances. The most typical is the kidneys, which can produce hundreds of liters of raw urine a day, but only a little bit is excreted, and for example, bile is first concentrated in the gallbladder, and some components are recovered and secreted into the intestines, and at the same time, there are intestinal cells that can recycle cholesterol back into the body, but there is no recycling system for sweat, so this sweat gland is definitely not a suitable way to excrete. ”

"Except for some stressful states, sweating often has only one purpose: to accelerate the evaporation of water on the body surface, reduce the body surface temperature, and then reduce the regulation of body temperature, which is only for the purpose of maintaining the stability of the internal environment, not for excretion. For example, drinking water or eating too much salt in the cold will only make you run to the toilet more frequently, but will not make you sweat profusely. If you have to say that this sweat gland detoxification, it can only be said to be a dispensable supplement to the kidneys. If the human body is always in a relatively cold environment, there will be no visible sweating at all, and from this point of view, sweat glands are not something that people must have!"

Hu Yifei nodded and said, "Yes, some animals, such as dogs, do not have sweat glands, so dogs rely on sticking out their tongues to cool down in summer." (To be continued......)