Understanding Fat Dissolving Injections — Aqualyx and Beyond

Last updated: 5 March 2026

How Fat Dissolving Injections Work

Fat dissolving injections use synthetic deoxycholic acid to permanently destroy fat cells in targeted areas. Deoxycholic acid is a naturally occurring bile acid that aids fat digestion. When injected into subcutaneous fat deposits, it disrupts fat cell membranes, releasing their lipid contents which are then naturally metabolised and eliminated by the body.

Available Products

Aqualyx

The most widely used fat dissolving product in the UK. Aqualyx contains desoxycholan-phosphatidylcholine and is CE-marked for submental fat (double chin), jowls, and small body fat deposits. Multiple sessions (typically 2 to 4) spaced 4 to 6 weeks apart are required.

Lemon Bottle

A newer product gaining popularity, Lemon Bottle contains riboflavin, bromelain, and lecithin. It markets itself as having less swelling and downtime than traditional fat dissolvers, though independent clinical data is more limited.

Suitable Treatment Areas

• Submental fat (double chin) — the most popular application
• Jowls and lower face contour
• Bra fat and axillary rolls
• Small abdominal fat deposits
• Inner thighs and knee fat

What to Expect

Swelling is the primary side effect, often significant for 3 to 7 days. Bruising, tenderness, and temporary numbness are common. Fat destruction begins immediately but visible results develop over 4 to 6 weeks as destroyed cells are processed.

Key Takeaways

• Fat dissolving injections permanently destroy targeted fat cells
• Multiple sessions are typically needed for optimal results
• Swelling is expected and can be significant for the first week
• Results are gradual, developing over 4 to 6 weeks per session

Frequently Asked Questions

Is the fat loss permanent?

Yes. Destroyed fat cells do not regenerate. However, remaining cells can enlarge with weight gain, so maintaining a stable weight is important.

How much does it cost?

Costs vary by area and practitioner. A course of submental treatment typically ranges from £600 to £1,500.

Who is not suitable?

Patients with active skin infections, autoimmune conditions, liver disease, or those who are pregnant/breastfeeding should not receive fat dissolving injections.

Medical Disclaimer: This article is for informational purposes only. Consult a qualified practitioner.