Entering Why Are Hormones Immortal?
Hormone Basics You Must Know Before Reading This Book

Part 1: The Origin of Life: Health and Youth Are Determined by Hormones
Chapter 1 Melatonin

Part 2: Growth (0-10) Proper growth determines life.
Chapter 1 Testosterone
Chapter 2 Estrogen
Chapter 3 Growth Hormone
Chapter 4 GABA, gamma-aminobutyric acid

Part 3: Maturity (20s-30s) Cry, laugh, and love.
Chapter 1 Dopamine
Chapter 2 Oxytocin
Chapter 3 Serotonin
Chapter 4 Norepinephrine & Epinephrine

Part 4: Well-Aging (40s-50s): Prepare for Your Body's Future
Chapter 1 Cortisol
Chapter 2 Thyroid Hormones
Chapter 3 Insulin

Part 5: A healthy old age through hormonal recovery (60s-80s)
Chapter 1 Again, Growth Hormone
Chapter 2 Again, Sex Hormones
Chapter 3 Myokines
Chapter 4 Melatonin

In conclusion, hormone management is life management!

A hormone that has existed since 5 million years ago when mankind was born.
Where there is life, there are hormones!

Hormones influence a person's entire life.
A baby who is born and begins his life in the bright light of the world grows with the power of growth hormones and sex hormones, reaches puberty, and becomes an adult.
It is all thanks to hormones that we become working adults, fall in love, get married, become pregnant, give birth, and go through the intense and hot summer of life.
In our 20s and 30s, various hormones closely related to emotions, stimulation, achievement, and challenges play a harmonious role in our bodies.
In our 40s and 50s, when we have a responsibility to age healthily, the role of hormones related to stress, appetite, and obesity becomes important.
In the 60s to 80s, when a happy retirement is key, all hormones are depleted with aging, so it is necessary to supplement appropriate hormones according to the symptoms experienced by the individual.


Hormones are responsible for everything the body needs to do on its own, from regulating body temperature, appetite, sex drive, and sleep, to growth, basal metabolism, protein synthesis, fat breakdown, oxygen radical removal, immunity, pregnancy, childbirth, breastfeeding, stress management, and emotional regulation.
Not only that, hormones determine our health, our psychological state, our mood, our personality, and even the way we love.
In this book, the first hormone to open the cycle is melatonin, and the second is melatonin to close it.
Melatonin is the 'sleep hormone'.
Melatonin is why our bodies are designed to wake up in the morning and sleep at night, and why our sleep cycles are aligned with the Earth's rotation as the sun rises and sets.
However, the authors make the astute observation that the term 'sleep hormone' oversimplifies melatonin's function.


Because the role of melatonin doesn't end with simply making you sleep.
Melatonin is a powerful antioxidant hormone that removes active oxygen.
Active oxygen species attack DNA, and when DNA is damaged, aging occurs.
The more melatonin cleans out free radicals, the more it can prevent serious diseases like cancer and maintain youth and beauty for a longer period of time.
So what are the hormones that shape our personality and disposition, and determine how we love? These four hormones are the main ones: dopamine, serotonin, testosterone, and estrogen.
Hormones are such important and wonderful things.

“It has only been about 100 years since mankind discovered hormones and began to understand their meaning.
However, hormones existed 5 million years before the birth of humans, and also existed in primitive animals and plants before humans.
Where there is life, there must have been hormones.
“The reason plants respond to light and gravity and can resist pests on their own, the reason insects transform from larva to pupa to adult, the reason ants form a hierarchical society and move in a group in perfect order, the reason cats avoid people and dogs follow them – it’s all because of hormones.” Hormones hold the key to a deep understanding of plants, animals, people, and even the world.


The best 'hormone doctor' in Korea,
It will change not only your quality of life but also your destiny.
Speaking of hormones with incredible power

This book divides the human life cycle into development (ages 0-10), maturity (ages 20-30), well-aging (ages 40-50), and resurgence (ages 60-80), and discusses in detail the hormones that work the hardest in each period.
First, we introduce the major hormones and explain the key roles they play.
After that, we will inform you about the problems and diseases that can occur when there is an excess or deficiency of the hormone, and provide specific methods on how to solve them.
In addition, it provides information that combines knowledge and common sense related to the hormone, as well as advice that can be put into practice and utilized in daily life.
For example, when talking about melatonin, we talk about the ideal bedtime and why sleep is the best anti-aging secret, and advice for those who inevitably work night shifts and shifts.
When we explain serotonin, also known as the appetite suppressant hormone, we learn about the fundamental principles of dieting and why our stomachs hurt when we are stressed.
When we talk about dopamine, we tell interesting and mysterious stories, such as what dopamine does when we fall in love and the role it plays in moving from passionate love to stable love.

The author of this book, Professor Ahn Cheol-woo, is an authority on endocrinology in Korea and the best 'hormone doctor'.
He leads the Endocrinology and Diabetes Center at Gangnam Severance Hospital and has received the Yonsei University College of Medicine's Outstanding Achievement Professor Award in the field of education. He has also appeared on renowned medical programs such as KBS's "Secret of Birth, Aging, Illness, and Death" and EBS's "Myung-ui."
He said that although he had already published several books on hormones, he felt he had not been able to talk about hormones in depth enough.
This book is like a cool shower, written at the end of his thirst.
As a scholar of hormones, this book generously shares his knowledge and expertise, delving into how hormones work throughout life as an encyclopedia while also providing informative and entertaining stories that are like a friend.

In this book, the author emphasizes that it is too late to rush into managing a disease closely related to hormones when it occurs, and that hormone management is necessary from a healthy age.
It informs us that hormones are not just a physical problem, but a problem for both the body and mind, and reveals one by one what diseases hormonal imbalances cause.
People who are unusually lethargic and depressed tend to have low testosterone levels, while those who are frequently anxious and irritable tend to have low serotonin and melatonin levels.
People who suffer from high blood pressure and diabetes, who continue to gain weight and are in poor physical condition, have low levels of growth hormone or high levels of the stress hormone cortisol.
Most people live without paying attention to hormones, and only when problems arise in their body and mind do they realize the importance of hormone management.
However, hormones need to be managed from a healthy age, and it is better to start from a younger age if possible.


This book clearly covers health management such as diet and exercise, medical treatments, and hormone management methods that should be practiced in daily life. By reading this book alone, you can learn the secrets to hormones, health, and even a long and happy life.
Above all, it conveys the key point that you can successfully maintain hormonal balance simply by managing your lifestyle habits.
Working hard, eating well, resting well, laughing a lot, and loving a lot are the ways to manage your hormones well.
So, managing your hormones well is managing your life well.


Hormones that work tirelessly from the moment we are born until the moment we close our eyes, hormones that are passed down from species to species, hormones that will survive and dominate as long as life exists, and therefore hormones are immortal.
If we properly understand and wisely manage the immortal hormone, we will become 'masters of immortality' at least for the rest of our lives.
What's even more surprising is that it also brings health and happiness.
And this book will be the golden key to fulfilling that role.