[Physician-Reviewed] What Is a Fat-Dissolving Injection (FatX Core)? A Thorough Guide to the Medical Body Contouring Effective for Double Chin and Belly Spot Fat Reduction

What Is a Fat-Dissolving Injection (FatX Core)?
The Basics

A fat-dissolving injection is a medical body contouring treatment that reduces fat in a specific area by injecting a fat-dissolving agent directly beneath the skin. Because no scalpel is used, there are no noticeable scars, and the strain on the body is minimal.

At our clinic we use “FatX Core”. It is a highly reliable formulation that has received US FDA approval, and its active ingredient, 1.0% deoxycholic acid, breaks down fat cells directly so they are eliminated from the body.

Note: What is deoxycholic acid?
Deoxycholic acid is a naturally occurring substance found in human bile. By destroying the cell membrane of fat cells, it causes the fat cells themselves to disappear. FatX Core has a high concentration of the active ingredient (1.0%), so a higher slimming effect can be expected even with a smaller dose.

How Injection Lipolysis Works

STEP 1
The doctor injects FatX Core beneath the skin of the target area using an ultra-fine needle.

STEP 2
The active ingredient, deoxycholic acid, destroys the cell membranes of the fat cells.

STEP 3
The destroyed fat cells are eliminated from the body through the lymphatic and blood vessels.

STEP 4
The number of fat cells decreases, improving the body line in that specific area.

3 Reasons FatX Core Is Chosen｜
The Strength of US FDA Approval

Reason 1: A Highly Safe Formulation with US FDA Approval

FatX Core is a formulation that has received approval from the US FDA (Food and Drug Administration). Approval from the FDA, one of the strictest drug-review authorities in the world, means that the formulation’s safety and efficacy have been scientifically proven. At our clinic, all fat-dissolving injections are performed directly by a physician.

Reason 2: High 1.0% Deoxycholic Acid Concentration for Strong Results Even in Small Doses

Because it contains 1.0% deoxycholic acid as the active ingredient, a high fat-dissolving effect can be expected even with a small injected volume. This keeps the number of treatments and the amount of solution down, helping reduce the burden on the patient.

Reason 3: A “No-Cut” Treatment with No Scalpel

Because FatX Core is an injection treatment with an ultra-fine needle, the procedure takes only about 10 minutes, and you can return to your daily routine the same day. It is an easy treatment to undergo even for those who feel “surgery is scary” or “I can’t take time off work.”

For spot fat reduction, feel free to reach out first.

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Recommended Areas & Who It’s For

Areas Where FatX Core Excels

• Face and under the chin (double chin): The most frequently requested area. A guide of 2-5cc.
• Belly and waist: For improving a protruding belly. A guide of 10-20cc.
• Upper arms: Can also address areas prone to sagging.
• Thighs and hips: Also suitable for spot fat reduction on the lower body.
• Cheeks: For those who want to slim the facial line.

Especially Recommended For

• Those who, despite dieting and exercise, can’t lose fat in certain areas only
• Those who want to slim their double chin or facial line
• Those who are hesitant about liposuction, which involves surgery and hospitalization
• Those who want to keep downtime short and minimize the impact on daily life
• Those who want to achieve a naturally refined body line through spot fat reduction

How It Differs from Regular Dieting｜
Why Rebound Is Less Likely

Pricing & Treatment Flow (Step-by-Step)

STEP 1｜Counseling & Examination
The doctor checks the area of concern and explains whether the treatment is suitable, the injection volume, and the price.

STEP 2｜Application of Numbing Cream (Optional)
For those worried about pain, a numbing cream is applied. (Additional fee)

STEP 3｜FatX Core Injection (Procedure, about 10 minutes)
The doctor uses an ultra-fine needle to inject FatX Core into the area of concern.

STEP 4｜Aftercare & Precautions
We explain the post-treatment precautions. You can wash your face and shower the same day.

Downtime & Post-Treatment Precautions

• Possible the same day: washing your face, applying makeup, showering
• Please avoid for 2 weeks: bathing (soaking in a tub), saunas, hot packs, and other high-heat stimulation
• Avoid rubbing or massaging the treated area forcefully
• Drink plenty of water after the procedure to support lymphatic flow

Who Should Not Receive It / Contraindications

• Those who are pregnant or breastfeeding
• Those with severe liver or kidney disease
• Those who are allergic to the injection’s ingredients
• Those with an infection or inflammation of the skin at the treatment area
• Those with a severe bleeding disorder
• Those with an autoimmune disease (particularly scleroderma)
• Those undergoing chemotherapy

Frequently Asked Questions (FAQ)

Q. Can I feel results even after a single treatment?
A. It is possible to feel results even after one session. For higher results, we recommend 2-4 treatments.

Q. How long does the procedure take?
A. The injection procedure itself is completed in about 10 minutes. Including counseling, the total time is roughly 30 minutes.

Q. Is the procedure painful?
A. You will feel a pinprick when the needle is inserted and some pain as the solution goes in. Topical anesthesia (additional fee) is available.

Q. What is the relationship between fat-dissolving injections and rebound?
A. Because fat-dissolving injections destroy and eliminate the fat cells themselves, the number of cells decreases, which is said to help make a body less prone to rebound.

Q. How do fat-dissolving injections differ from liposuction?
A. Liposuction is a surgical procedure that can remove a large amount of fat, but it requires general anesthesia and a long downtime. For small-volume, localized spot fat reduction, fat-dissolving injections are more suitable.

Summary｜Solve Spot Fat Concerns with Medical Body Contouring

• FatX Core is a US FDA-approved fat-dissolving formulation containing 1.0% deoxycholic acid
• Because it directly breaks down and eliminates fat cells, results that are less prone to rebound can be expected
• A pinpoint approach is possible for areas of concern such as under the chin, the belly, the upper arms, and the thighs
• The procedure takes about 10 minutes, and showering, washing your face, and makeup are OK the same day
• Higher results can be expected with 2-4 treatments (interval: 2-4 weeks)
• A first-time-only campaign is available (4,000 yen per 1cc)

For your spot fat concerns, talk to a doctor.

Men’s Care Clinic

FatX Core fat-dissolving injection｜first-time only, from 4,000 yen per 1cc

Start with a free consultation

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References
US FDA (Food and Drug Administration) Official Site
Ministry of Health, Labour and Welfare – Pharmaceuticals and Medical Devices Information
Japanese Dermatological Association

Medical Review: Men’s Care Clinic Physician
Board-certified specialist in cosmetic and plastic surgery. This article was prepared based on the latest medical knowledge. It is intended for informational purposes only and is not a substitute for diagnosis or treatment.