If you are sensitive to beauty and wellness trends, there is a name you may have heard at least once: Hailey Bieber, the famous international model. After she introduced it as part of her beauty routine, it received explosive attention around the world. The NAD injection, commonly known as the “Hailey Bieber injection,” is the treatment in question.
Known as one of the secrets to maintaining vibrant energy while managing a busy schedule under dazzling lights, it has also become popular among Korean celebrities, and inquiries about it continue to grow in Cheongdam-dong, the center of current trends. This is because the importance of “inner beauty”—replenishing energy from the cells inside the body rather than simply caring for the surface of the skin—is growing.
However, rather than blindly following a treatment simply because a celebrity receives it, it is important to carefully consider exactly how it works in the body and whether it is truly necessary for you.
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What exactly is NAD, the subject of worldwide attention?
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Managing the battery life of our bodies
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Why choose injections instead of oral supplements?
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A checklist to review carefully before treatment
- What exactly is NAD, the subject of worldwide attention?

We need energy to live. Just as a car needs fuel to move and a smartphone needs electricity to operate, the cells—the smallest units that make up our bodies—must also produce energy every moment in order to sustain life and function.
NAD (Nicotinamide Adenine Dinucleotide) is an essential coenzyme that helps mitochondria, often called the power plants within cells, generate energy. The name may sound somewhat complicated, but it can be easily understood as a key fuel and switch involved in the body’s overall metabolic activity.
It is deeply involved in protecting cells and repairing damaged DNA, and it plays a role in regulating various biological clocks associated with aging. The problem is that the amount of NAD produced in the body decreases sharply as we age. Some studies have found that by middle age, it falls to about half the level seen in youth. As a result, people may experience chronic fatigue or feel that their physical functions are no longer what they used to be.
- Managing the battery life of our bodies

Let us compare the core principle of NAD injections to a smartphone battery. When you buy a new smartphone, its battery is fully charged at 100%, and it runs energetically throughout the day. Even when several apps are running, there is no lag. This is what the body is like in youth, when NAD levels are high.
However, as you use a phone for a long time, the battery’s performance itself deteriorates. No matter how much you charge it, it quickly runs out of power, and the device becomes slower. The same applies to the body. When NAD levels fall, the efficiency with which cells produce energy drops sharply. You may remain tired despite getting plenty of rest, develop a dull complexion, and experience reduced concentration.
The reason the “Hailey Bieber injection” is attracting attention is that it is an attempt to restore the performance of this depleted battery. By supplementing NAD directly from outside the body, it helps cells produce energy actively again. This may help increase vitality, normalize reduced metabolic function, and improve overall condition. It is suitable for anti-aging.
- Why choose injections instead of oral supplements?

You may wonder why it is necessary to visit a clinic and receive NAD through an injection. There are many supplements on the market containing NMN and other NAD precursors. The important difference here is “absorption.”
Supplements taken orally are broken down by digestive enzymes as they pass through the stomach and intestines. During this process, the amount that actually enters the bloodstream and reaches the cells is significantly reduced. In contrast, IV infusion therapy provided at places such as Cheongdam dermatology clinics delivers the active ingredients directly into the bloodstream without passing through the digestive system.
It is like taking a highway directly to your destination rather than traveling along a heavily congested road. Therefore, this method can supply a high concentration of the ingredients to the body quickly and efficiently, which is why people seeking a more immediate improvement in their condition may prefer it. It can be considered a suitable approach for people who need efficient care in a short period because of busy schedules.
- A checklist to review carefully before treatment

No matter how beneficial an ingredient may be, it is not necessarily suitable for everyone. Responses may vary depending on an individual’s health condition. In particular, NAD injections are a medical procedure involving the administration of highly concentrated ingredients, so consultation with an experienced medical professional must come first.
People sometimes receive treatments indiscriminately at unverified facilities simply because they want to follow a trend. However, it is essential to carefully assess your current metabolic condition, the presence of any underlying diseases, and possible allergic reactions before determining the appropriate dosage and treatment interval. As the saying goes, too much can be as bad as too little; receiving more injections does not necessarily lead to better results.
In addition, this treatment is not a cure-all. Its effects may be maximized when lifestyle changes—such as regular sleep, a balanced diet, and appropriate exercise—are carried out at the same time. Rather than focusing on outward glamour, listening to the signals your body sends and building fundamental health is the true beginning of healthy aging.
If you would like to revitalize your tiring daily life with a personalized, one-on-one solution tailored to you, we recommend consulting with Cheongdam dermatology clinic 라리안청담의원, which has a systematic diagnostic system.
This post was
written directly by 라리안청담의원
for the purpose of providing information
in compliance with Article 56 of the Medical Service Act and its Enforcement Decree.
All procedures and surgeries may result in
adverse reactions,
so please receive treatment
after sufficient consultation with medical professionals.
Director Kang Ji-yeon of 라리안청담의원