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Updated: Jun 5, 2026

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Localization, Identification, and Excision of Murine Adipose Depots
Published on: December 4, 2014
Does carbon dioxide therapy really diminish localized adiposities? Experimental study with rats
Ozan Balik1, Mustafa Yilmaz, Alper Bagriyanik
1Plastic Reconstructive and Aesthetic Surgery Department, OB Aesthetic and Plastic Surgery Clinic, İstanbul, Turkey. ozan.balik@gmail.com
Aesthetic Plastic Surgery
|December 31, 2010
Summary
Carbon dioxide (CO(2)) injections effectively reduced adipocyte size in rats, showing faster results than breathable air. Mechanical effects of gas injection appear more significant than metabolic effects for localized fat reduction.
Area of Science:
- Biochemistry
- Physiology
- Medical Aesthetics
Background:
- Carbon dioxide (CO(2)) gas is used for localized adiposities due to its potential lipolytic effects.
- Existing studies on CO(2) therapy lack sufficient evidence regarding its efficiency and scientific basis.
- CO(2) therapy is globally popular despite unclear scientific validation.
Purpose of the Study:
- To evaluate the efficacy of CO(2) therapy for localized adiposities.
- To compare the biochemical and histomorphologic effects of CO(2) injection versus breathable air.
- To investigate the role of mechanical versus metabolic effects in gas injection therapies.
Main Methods:
- An experimental study was conducted on 28 female Wistar rats.
- Rats were divided into five groups: sham, acute/chronic CO(2) injection, and acute/chronic breathable air injection.
- Gas was injected into the groin using a controlled applicator; histomorphologic examination and laser-Doppler flowmetry were employed.
Main Results:
- Adiposity bulging resolved in approximately 30 minutes with CO(2) injection, versus over 48 hours with breathable air.
- No significant increase in blood flow or velocity was observed via laser-Doppler in gas-injected groups compared to the sham group.
- A statistically significant difference in adipocyte count was found between groups.
Conclusions:
- CO(2) injection led to a statistically significant decrease in adipocyte diameters in both early and late phases.
- CO(2) therapy demonstrated greater success in reducing adipocyte volume compared to air injection.
- Mechanical effects of gas injection, rather than metabolic effects, appear to be the primary drivers of adipocyte volume reduction.
