I'm in Naruto Cultivation

"The Yin seal fine-tunes the chakra of the whole body, which can be used to seal up the extra chakra, and another effect it brings is to maintain youth."

"However, does this effect come from the Yin Sealing technique itself, or is it because the position of the chakra it seals is just in the human energy field of the eyebrow chakra?"

"And, the Yin seal, can chakra only be sealed between the eyebrows?"

"Is it true that it is for beauty?"

Xuan Yue frowned, dissatisfied with Tsunade's answer.

"This teacher is so irresponsible..."

Xuanyue secretly complained, but she forgot that Tsunade was not willing to be a teacher at all.

"The specific situation cannot be determined just by looking at the principle. You can only feel it by practicing it yourself!"

"It's just, is it really good to seal Chakra between the eyebrows, I'm a man..."

Xuanyue's face suddenly twitched, and she thought about it: "It seems that you have to plan to cooperate with Orochimaru. If you want to explore the seven-round energy field, you must use a clone, and shadow clones are useless!"

He doesn't know much about cloning, but fortunately there is an Orochimaru.However, this guy is also a dangerous person.

"However, the most important thing right now is the Yin seal and the Yin Escape Chakra!"

Concentrating on her emotions, Xuan Yue began to study the Yin seal attentively.

The next day, Xuan Yue still separated a shadow clone to go to school, while the main body stayed at home to study the Yin seal.After last night's research, he has already gained a deep understanding of the Yin Seal. For him, the biggest difficulty in this technique is not in other places, but in Chakra control, which he is good at.

There is no doubt that this technique is a sealing technique, and the Uzumaki family started out with sealing techniques, and they are very talented. Xuanyue and Jiu Xinnai have learned sealing techniques a long time ago, so this aspect is not difficult, and this technique is very useful for Chakra. The control requirements have reached the anti-sky level.

All he can say is that it is indeed the first ninjutsu of those two forbidden arts!

Another important point is that the acupoints and meridians used in Yin Seal are connected to the pituitary gland.

Xuan Yue finally understood why Tsunade became so fierce.Of course, that's not the point. The point is that Tsunade's secret to keeping his youthful beauty comes from this.

"Learn the Yin Seal, and if you give me time, I should be able to create the two forbidden techniques of Creation and Regeneration and the Technique of Hundred Heroes without Tsunade's teaching. Of course, this will take a long time..."

This is not because Xuan Yue is boastful and arrogant, but because he has an amazing understanding of the human body.Judging from the effect of creating regeneration and the technique of Baihao in the original work, the key lies in the pituitary gland, which is closely related to the Yin seal.

why?Because the pituitary gland can secrete seven very important hormones.

First of all, growth hormone can promote growth and development, protein synthesis, and bone growth.Secondly, prolactin, this needs no explanation...

The focus is on thyroid-stimulating hormone, which stimulates thyroid hyperplasia, cell enlargement, and increase in number.

All in all, the pituitary gland is the master switch that regulates the health and balance of the body, controlling the secretion of various hormones that are important for metabolism, growth, development, and reproduction.

After the average person is 40 years old, the pituitary gland shrinks, and the human body will begin to age rapidly.

Obviously, the Yin seal has a huge role in maintaining and nourishing the pituitary gland with chakra, so that in the original work, Tsunade is still like a young woman at the age of five, six, seven or eighty.

"It's a pity I don't have a blank eye..."

Looking at the human anatomy chart on the scroll, Xuan Yue couldn't help sighing, but his eyes were not on the pituitary gland, but on another location.

Pineal gland!

This thing, even in the past life, is very mysterious, medical science has limited understanding of it, far less than the pituitary gland.

But from what is known, the pineal gland affects people's emotional changes, intelligence, and biological clock regulation.In addition, he also has a close connection with the eyes of people.Even, it is called the third eye of man, and it is also the eye of God.

This has to make Xuanyue think of the Uchiha family's writing round eyes and reincarnation eyes!

Therefore, if he has a blank eye, he can peep at the Uchiha family.

"I have to say, the white eyes of the Hyuga clan are really in the wrong direction..."

Xuanyue couldn't help but secretly complained, and at the same time she suddenly understood why Uncle Snake embarked on the road of human experimentation. It is true that such research is really addictive.

That thrill of prying into the mysteries of the human body, of prying into the truth of the universe, drives you to desperation.Any ethics and morality can be thrown into flames!

"Sure enough, how big is the brain hole, how big is the achievement, the second generation of Hokage and Uncle Snake are typical examples!"

"Fortunately, I have socialist core values... I'm not afraid of becoming a Frankenstein!"

Xuan Yue sighed, then lowered her head and continued to study.

The ninja school, after school in the afternoon, looked at Kai who was entangled with Kakashi not far away, Xuan Yue's shadow clone couldn't help smiling, and then walked up quickly.

"Kay, Kakashi!"

Xuan Yue greeted him with a smile. Since the last time he broke through the bottleneck because of Kai's stimulation, he took the initiative to make friends with Kai, and because of this, he met Kakashi.However, in the current state of Kakashi, it is only a nod.

"Xuanyue, you came just in time, let's have a bloody youth showdown!"

Kai said the lines of the second middle school, and let out a passionate howl, as expected of a beast.No, it's a rare beast!

Xuan Yue helplessly spread her hands: "Kai, although I also really want to have a youthful duel with you, but I'm just a shadow clone, I'm afraid I can't stand your punch!"

The dumb Kakashido glanced at Xuanyue, and then said to Kai: "Kai, I'll go first!"

"Hey, Kakashi..."

Kai shouted, then gestured with Xuanyue, and chased after him.

Xuanyue stood on the spot and looked at the two people who were leaving, and couldn't help thinking: "Well...the second is a little bit second, but I have to say that Kai is indeed a good teacher and friend, and Hatake Sumo's vision is indeed amazing!"

Xuanyue came to a conclusion, and then looked at the head of Hokage in the distance: "It's really a pity Hatake Sumo, the elite Junin, and even the shadow-level powerhouse, just died like this..."