RET vs CET Radio Frequency: What’s the Real Difference?
Summary：Radio Frequency (RF) technology is widely used in aesthetics for skin tightening, fat reduction, and body contouring. But within RF treatments, two methods are often discussed: RET (Resistive Electric Transfer) and CET (Capacitive Electric Transfer). While both stimulate collagen and improve circulation, their working principles and applications differ. Understanding these differences helps clinics choose the right technology for their clients.
What is CET (Capacitive Electric Transfer)?
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Uses a capacitive electrode with an insulating layer.
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Delivers energy mainly to superficial tissues (skin and subcutaneous fat).
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Best for skin tightening, wrinkle reduction, and surface-level rejuvenation.
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Gentle and comfortable, suitable even for sensitive areas like the face.
What is RET (Resistive Electric Transfer)?
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Uses a resistive electrode that penetrates deeper.
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Delivers energy directly into muscles and deeper fat layers.
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Best for body contouring, fat reduction, and muscle recovery.
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Stronger heating effect—ideal for thick or fibrous tissue areas.
RET vs CET: Key Differences
| Feature | CET (Capacitive) | RET (Resistive) |
|---|---|---|
| Depth of Action | Superficial layers (skin, subcutaneous fat) | Deeper layers (muscle, thick fat, connective tissue) |
| Best For | Skin tightening, facial rejuvenation | Body contouring, cellulite reduction, muscle recovery |
| Comfort | Gentle, relaxing, low heat sensation | More intense, stronger heat sensation |
| Applications | Face, neck, delicate skin | Abdomen, thighs, buttocks, larger areas |
Which One Should You Choose?
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CET: Best for clients wanting skin tightening, anti-aging, and surface-level improvements.
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RET: Better for body contouring, fat reduction, and post-exercise recovery.
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Combined RET + CET: Many modern RF devices integrate both modes, offering clinics versatility for full-face and body treatments.
Conclusion
Both RET and CET radio frequency are powerful tools in aesthetics. CET targets superficial layers for skin tightening, while RET penetrates deeper for fat reduction and muscle recovery. For clinics, offering devices that combine both technologies ensures a wider range of treatments and better client satisfaction.