“I lost five kilos in three months of dieting, but regained four kilos within two weeks of returning to normal eating.” This is the “nightmare cycle” for many dieters. Traditional weight‑loss methods often fall into the trap of “lose‑rebound‑lose again,” while surgical liposuction is daunting for many. The Korean “One‑Shot” Long‑Acting Targeted Lipolysis combines “sustained‑release microsphere” technology with “targeted fat breakdown” – a single injection delivers months of continuous fat metabolism, turning weight management from a frustrating cycle into a one‑time solution.
Dieting works by creating a calorie deficit, but the body responds by lowering its basal metabolic rate to “save energy.” When you return to normal eating, your metabolism hasn’t recovered, so calorie intake once again exceeds expenditure, and fat rebounds quickly. Worse, dieting loses not only fat but also muscle and water, making your body composition worse – the fat percentage actually increases.
Exercise is healthy but requires long‑term commitment, and it has limited effect on stubborn local fat (like the abdomen, back, and inner arms). Many people persist for months, lose weight, but still have love handles and bat wings, because genetics dictate that these areas are the last to be mobilised.
Liposuction can remove fat cells, but it is invasive, requires a long recovery, is expensive, and does nothing for general obesity (like visceral fat). Traditional daily or weekly injectable weight‑loss drugs require frequent clinic visits, which is too time‑consuming for modern lifestyles.
The core issue is that effective weight management needs long‑lasting, steady, and gentle fat‑metabolism support, not extreme “short‑burst” approaches. The “one‑shot” concept was born from this need – one injection, long‑lasting action, allowing the body to burn fat continuously for months.
“One‑Shot” Long‑Acting Targeted Lipolysis is a novel injectable treatment that uses PLGA (poly‑lactic‑co‑glycolic acid) sustained‑release microspheres loaded with fat‑breaking active ingredients. It injects a composite solution containing these microspheres into the subcutaneous fat layer, allowing the active components to be released slowly and continuously over 4‑6 months.
The microspheres are about 20‑50 microns in diameter and are gradually engulfed and degraded by macrophages. During degradation, they continuously release “fat‑breakdown signalling molecules” – including a β3‑adrenergic receptor agonist and L‑carnitine complex. The former persistently activates the “fat‑burning switch” in adipocytes, while the latter transports released free fatty acids into mitochondria for oxidative breakdown. Throughout the process, the blood concentration of active ingredients remains stable, avoiding the “peak‑and‑trough” fluctuations of daily injections and reducing side effects.
After injection, triglycerides inside fat cells are gradually broken down into glycerol and free fatty acids, which enter the bloodstream and are metabolised in the liver, eventually excreted as carbon dioxide and water. Thanks to the sustained‑release profile, fat reduction is smooth and steady, without the risk of rapid rebound or metabolic disruption.
PLGA microspheres are FDA‑approved biodegradable materials that degrade slowly in the body via hydrolysis. The degradation period can be precisely controlled (typically designed for 4‑6 months) by adjusting the polymer molecular weight and copolymer ratio. Each microsphere acts like a tiny “drug depot,” gradually releasing active ingredients as it degrades, keeping fat‑breakdown signals stable for months. This “steady‑state” delivery avoids the blood‑concentration fluctuations of traditional injections and reduces injection frequency.
The β3‑adrenergic receptor agonist released from the microspheres specifically activates β3 receptors on adipocytes, triggering the “adenylate cyclase‑cAMP‑PKA” signalling pathway, which activates hormone‑sensitive lipase (HSL) to break down triglycerides into free fatty acids and glycerol. This process occurs simultaneously in multiple fat tissues throughout the body, primarily targeting subcutaneous and visceral fat, with no effect on muscle tissue.
L‑carnitine transports the released long‑chain fatty acids across the mitochondrial inner membrane for β‑oxidation to produce acetyl‑CoA, which enters the TCA cycle for complete oxidative breakdown. This process truly “burns” fat rather than merely “dissolving” it. Unlike appetite‑suppressant drugs, this “active metabolism” model does not rely on reducing food intake, so it does not cause malnutrition or a drop in basal metabolic rate.
Several months of moderate‑intensity fat metabolism “resets” the body’s energy‑utilisation preference. Studies show that after long‑term steady fat oxidation training, mitochondrial density and oxidative enzyme activity in skeletal muscle significantly increase, making the body more inclined to use fat for fuel even after returning to a normal diet. This “metabolic memory” effect is one of the key advantages of the “one‑shot” approach over traditional weight‑loss methods.
Natural feel: Weight loss follows a “smooth curve” – about 0.5‑1kg per week – allowing the skin enough time to retract, avoiding sagging or wrinkles.
Harmonious integration: Fat reduction is systemic, not limited to specific areas, gradually optimising overall proportions and achieving body balance.
Personalised precision: Based on each individual’s basal metabolic rate, fat distribution, and weight goals, the microsphere dosage and release period can be customised – a “one‑size‑does‑not‑fit‑all” approach.
Long‑lasting durability: One injection lasts 4‑6 months; after the effect ends, results can be maintained long‑term through healthy lifestyle habits, with no need for frequent clinic visits.
| Dimension | Dieting | Daily Injectable Fat Burners | “One‑Shot” Long‑Acting Injection |
|---|---|---|---|
| Mechanism | Calorie restriction, passive weight loss | Daily activation of fat breakdown | Sustained‑release microspheres, continuous action for 4‑6 months |
| Adherence | High (requires long‑term willpower) | Moderate (daily injections are inconvenient) | High (single injection, no daily action) |
| Metabolic impact | Basal metabolism drops, prone to rebound | Blood‑concentration fluctuations, side‑effect swings | Steady‑state release, stable metabolism |
| Fat‑loss effect | Loses fat + muscle, poor composition | Primarily fat loss | Primarily fat loss, preserves muscle |
| Rebound risk | High (over 95% rebound) | Possible after stopping | Low (metabolic memory effect) |
| Convenience | No clinic visits needed | Requires daily/weekly injections | Single injection, long‑term benefit |
Pregnant or breastfeeding women, those with severe liver or kidney impairment, or known allergy to PLGA components are not recommended for this treatment.
💰 Cost Reference
In Korea, the “One‑Shot” Long‑Acting Targeted Lipolysis is priced by dosage and expected duration of action. A standard plan (4‑6 months) costs approximately 8,000,000 – 14,000,000 KRW; an enhanced plan (6‑9 months) costs about 12,000,000 – 18,000,000 KRW. The above includes injection fees, microsphere materials, and post‑treatment follow‑ups, but excludes oral supplements or dietary guidance. Some clinics offer “pay‑for‑performance” packages where the total cost may vary based on actual weight‑loss results.
🕒 Recovery Timeline
Day of injection: Mild soreness at the injection site, similar to a vaccine shot – subsides within 1‑2 hours. Normal activity and eating can resume; no special rest needed.
Days 1‑7: Some may experience a transient mild decrease in appetite or increased energy (related to fat‑metabolism activation) – this is normal. No dietary changes are required, but increasing water intake is recommended.
Weeks 1‑4: Fat metabolism gradually kicks in, and weight begins to show a “steady downward trend” (about 0.5‑1kg per week). Moderate aerobic exercise can be added to enhance the effect.
Months 1‑3: Fat‑loss effect peaks – waist and hip circumference measurements improve noticeably. Body fat percentage continues to drop, and muscle definition starts to appear. The body adapts to a “fat‑first‑burn” mode.
Months 4‑6: Microsphere degradation is nearly complete, and fat‑metabolism rate gradually returns to baseline. However, thanks to the “metabolic memory” effect, the rebound risk is significantly lower than with traditional weight‑loss methods. It is advisable to consolidate healthy eating and exercise habits after the effect stabilises.
Weight loss is difficult because the body always tries to “resist” change – treating every weight loss as a “famine” to defend against. The wisdom of the “One‑Shot” approach lies in gently and persistently telling the body: this is not a crisis, but an optimisation. When fat is metabolised smoothly, and metabolic memory is reprogrammed, you’ll find that the number on the scale is no longer the focus of your life, but a testament to the reconciliation between you and your body.