What these injections are
Deoxycholic acid is a bile acid the body makes for itself. The injectable form is a synthetic prescription medicine, not a cosmetic. It disrupts fat-cell membranes, and the body then clears the debris over time. Swelling is part of this clearing process.
The injectable was studied as ATX-101 in the phase 3 REFINE-1 and REFINE-2 trials, and the US FDA approved it in 2015. A registered product has to be available before it can be used, and availability varies. It is confirmed at consultation, not assumed from a web page. Your doctor will also explain whether another option fits you better. This page describes the medicine for your information. It does not mean a product can be used in your case.
Fat dissolving injections Singapore: what the approved use is
The approved use is moderate to severe submental fullness in adults, which means fullness under the chin. Use on the body is off-label. That includes the jowl, bra-line, knee, arm and abdomen. Body pockets need more medicine, so swelling rises, and energy devices are usually considered first. The medicine is discussed as a prescription treatment with a defined area, not as a general way of losing fat. If your fullness has another cause, the double chin guide sets out the alternatives.
How it is given
Why body use is not a default
Body use is off-label, and it is not a shortcut to slimming. A body pocket needs more medicine than the area under the chin, and more medicine means more swelling. Energy devices are usually considered first for this reason. Jawline use needs care, as a pad must be confirmed as fat rather than descended tissue, and the marginal mandibular nerve lies nearby. If your concern is overall weight, these injections have no role, because they do not affect body weight or visceral fat.
Who it may suit
Pinchable fat, at a stable weight, with skin that still recoils.
Small and discrete, and confirmed as fat rather than descended tissue.
Where shape, not volume, is the issue.
Age alone is not a bar. Skin quality matters more.
Who should not have it, or needs another plan
| Situation | Why it matters |
|---|---|
| Laxity-dominant neck | Removing fat can make laxity more visible |
| Large volumes | Energy devices or a plastic surgery referral may suit better |
| Current or past difficulty swallowing | This is listed as a reason to avoid it |
| Active infection or skin disease at the site | The area must be healthy |
| Prior surgery or scarring under the chin | This changes the plan |
| Bleeding disorder or blood thinners | These count against injection |
| Pregnancy or breastfeeding | There are no safety data |
| Short chin or prominent gland | Fat is not the cause, so the medicine cannot help |
What it cannot do
It acts on fat cells only.
These are structural, and chin assessment is separate.
It has no effect on weight or on visceral fat.
It is not a fat-loss solution, and it is not a default answer for a belly or other pockets.
Results depend on weight stability and skin quality.
A pad of descended tissue is not fat, so the medicine has no role.
Risks and side effects
Swelling, warmth, tenderness, redness, bruising, firmness and some numbness are expected. Swelling is the most common reaction in pooled data. Less common risks are injury to the marginal mandibular nerve, which can give an asymmetric smile or lower-lip weakness. Difficulty swallowing can occur. Skin ulceration is possible if the medicine is placed too superficially, and hair loss can occur at the site. Correct grid mapping, correct depth and staying within the approved area reduce these risks, but they do not remove them. Tell your doctor at once about an asymmetric smile, lower-lip weakness or trouble swallowing.
What recovery looks like
Swelling settles gradually, and the area can look fuller before it looks smaller. No fixed course can be promised. Use cool compresses. Avoid pressing or lying face-down on the area while it is swollen. Keep make-up off the injection points until they have closed. Report weakness, trouble swallowing, colour change or spreading redness to the clinic straight away.
Mesotherapy, salons and online products
Mesotherapy, meaning compounded or mixed lipolytic cocktails, is no longer permitted in Singapore outside an approved clinical trial. Products sold online or injected in salons, including those marketed as fat dissolving, fall outside the product and practitioner rules. If you have been offered one, or have already had one, tell your doctor what was used. Ask what the product is, whether it is registered, and who will inject it.
Other options and fees
For fat pockets, the energy-based options to discuss are fat freezing, Onda Pro and the 4K Body Lift. For the abdomen, see the belly fat guide. The number of sessions and the interval are not fixed here, and review timing is set at consultation. Fees are set out in writing after assessment, once your doctor has confirmed the cause, the area and the plan. These options have their own limits and risks. Fat freezing suits a discrete, pinchable pocket, Onda Pro suits localised fat with some laxity or cellulite, and the 4K Body Lift is aimed at compact fat and the skin over it.