Program XERF Dual-Frequency RF
Program XERF — what dual-frequency monopolar RF actually does
Nearly every monopolar radiofrequency device runs at one frequency. XERF, from Cynosure Lutronic, runs two in a single treatment — 6.78 MHz and 2 MHz. The interesting part is not the numbers. It is that the two bands heat different places, and running them in sequence produces something neither does alone.
Blog
01
Two frequencies, two destinations
| Band | Where it acts | Thermal behaviour |
|---|---|---|
| 6.78 MHz | Along the fibrous septa | Heats in a more localised pattern, concentrated along the connective strands that run through the tissue |
| 2 MHz | Into the adipose layer | Produces broader and deeper thermal spread through fat than the higher band does |
| 6.78 + 2 MHz | The dermosubcutaneous junction | Sequencing both bands concentrates the reaction where dermis meets fat, the plane single-frequency passes reach less consistently |
The junction where dermis meets fat is an awkward plane to work on — too deep for a high band to reach consistently, too shallow for a fat-directed pass to concentrate on. Sequencing the two bands puts the thermal reaction there. That is the physical argument for dual frequency, as distinct from the marketing one.
02
Where it must not go
Two of these are safety limits rather than aesthetic preferences, and neither appears on the manufacturer's own page.
- Facial tattoos, including cosmetic brow and lip tattoo — some tattoo pigments contain metallic components, which respond to radiofrequency differently from the tissue around them. Those areas are avoided. Tell the doctor beforehand even if the work is old or has faded substantially.
- The thyroid — the neck can be treated, but the thyroid region is left out. That is standard practice for heat-based work on the neck rather than something particular to this device.
03
The eye area, and the small tips made for it
Periorbital skin is the thinnest on the face, and small radiofrequency applicators have historically been limited by shallow penetration — they reach the surface but not the layers where brow position is actually held. XERF carries two small applicators engineered for this region, described in a 2026 Cureus report by a plastic surgery group in Israel with no manufacturer affiliation. Their stated objectives are eyebrow position and upper eyelid tightening.
The authors are careful about what that report is, and so should a reader be: it sets out a procedural protocol, the three-month impressions are described by the authors themselves as anecdotal rather than quantitative, and a prospective study collecting objective measures is still running. It is a description of how the tips are used, not proof of what they achieve.
Eye shields are placed before any periorbital pass at this clinic. Shielding the globe during radiofrequency work on the eyelid and infrabrow is a described method in the literature rather than an optional extra, and if a clinic offers eye-area radiofrequency without them, that is worth asking about.
04
Energy levels and the cooling system
The platform offers multiple energy levels and selectable depth, so the setting can be matched to the layer being worked on — from the superficial dermis down toward the SMAS. The doctor sets this against your skin thickness and the area, rather than running one fixed level across the whole face.
The handpiece delivers cryogen between pulses, which reduces how much the pulse is felt and protects the surface while heat works at depth. Pain is individual. Some people notice a firmer feel soon after the session; for others the visible change follows over the weeks as collagen is laid down. Response varies between individuals.
05
Who tends to be a fit
In practice this route appeals particularly to male patients, a good number of whom would rather not have anything injected — filler or otherwise. An energy-based device answers that directly: nothing is introduced into the tissue.
The other group is people who prefer ongoing maintenance to one large annual session. This class of device can be repeated in cycles to hold a result, with the doctor setting the interval that suits your skin — not simply as often as one likes.
06
The part about facial fat
Patients with slim faces ask whether a heat-based device will cost them facial fat. It is the right question — volume loss reads as ageing, not rejuvenation. In the porcine work on this dual-frequency pairing, a TUNEL assay found no evidence of adipocyte death in treated tissue, while collagen and elastic fibre remodelling was present.
The caveat matters as much as the finding: that is an animal model, one device, one set of parameters. It is not a guarantee about any particular face. Facial fat distribution should be assessed before any heat-based device is planned.
07
Where it sits against the devices already here
XERF is in the same family as Program Thermage FLX and Program Oligio X: monopolar radiofrequency, heating the dermis in volume. That is a different proposition from focused ultrasound — Program Ultherapy and Program Ultraformer III — which deposits discrete points of heat down to the SMAS. If you are choosing between the two families, the lifting-device comparison goes into it properly. Within the RF family, what differs is frequency strategy, handpiece cooling and impedance handling — which compare poorly on paper and much better against an actual face.
08
What the evidence covers, and what it does not
Plainly: the work describing this dual-frequency pairing is computational modelling with porcine histology, and a further paper using a bioprinted three-dimensional human dermis. Both are authored from Cynosure Lutronic Corporation, the manufacturer. That does not make the work unusable, but a reader deciding between devices should know it and weigh it.
Monopolar radiofrequency as a modality has more human evidence behind it, including a 2025 study of thirty-two patients using biopsies, three-dimensional skin analysis and elasticity probes. But that is evidence for the method, not for this model. No published human trial compares XERF against other RF platforms. Anyone telling you it performs better than they do is ahead of the current evidence.
09
Questions patients actually ask
What is XERF and how is it different from other radiofrequency devices?
XERF is a monopolar radiofrequency platform from Cynosure Lutronic that delivers two frequencies, 6.78 MHz and 2 MHz. Most monopolar RF devices run at a single frequency. In porcine modelling the higher band heated in a localised pattern along fibrous septa and the lower band spread more broadly through fat, with the two together concentrating the reaction at the junction between dermis and subcutaneous tissue. It sits in the same physics family as the Program Thermage FLX and Program Oligio X services already offered — bulk dermal heating, not focused ultrasound.
Does radiofrequency treatment reduce facial fat?
This is the question patients with slim faces ask most, and it is a fair one, because volume loss in the face ages it. In the published porcine work on this dual-frequency pairing, TUNEL assay found no evidence of adipocyte apoptosis — the fat cells in the treated tissue were not killed — while collagen and elastic fibre remodelling was seen across the dermis and septa. That is animal-model evidence about one device at specific settings, not a statement about any individual face, and a doctor should assess your facial fat distribution before any heat-based device is planned.
How does XERF compare with Thermage FLX or Oligio X?
All three are monopolar radiofrequency: energy heats the dermis in volume rather than depositing focused points the way micro-focused ultrasound does. They differ in frequency strategy, handpiece cooling and impedance handling. Which is appropriate depends on where your laxity sits, your skin thickness and your facial fat, which is what the consultation assesses. Comparing the machines in the abstract tends to be less useful than comparing them against a particular face.
How strong is the evidence behind XERF specifically?
It should be read carefully. The dual-frequency thermal work is computational modelling plus porcine histology, and a further paper uses a bioprinted three-dimensional human dermis model rather than patients. Both are authored from Cynosure Lutronic Corporation, the manufacturer, which a reader should weigh. A separate 2026 report on the periorbital tips comes from an Israeli plastic surgery group with no manufacturer affiliation, but its authors describe their observations as anecdotal. Broader monopolar radiofrequency has human data behind it, including a 2025 study of thirty-two patients with biopsies and instrument-based measurement, but that is the modality, not this device. No published human trial compares XERF against other RF platforms.
I have eyebrow tattoo or a facial tattoo — can I still have radiofrequency?
Tell the doctor before the session. Some tattoo pigments contain metallic components that respond to radiofrequency differently from surrounding tissue, so tattooed areas — including cosmetic brow and lip work — are avoided rather than treated through. This applies even to old or faded work, because faded colour does not mean the pigment has gone. The rest of the face can usually still be treated; the doctor plans around the area at consultation.
Can radiofrequency be used around the eyes?
XERF carries two small applicators engineered for the periorbital region, which a 2026 Cureus report by an Israeli plastic surgery group — independent of the manufacturer — describes using for eyebrow position and upper eyelid tightening. Those authors are explicit that their three-month impressions are anecdotal rather than quantitative, with a prospective study still collecting objective measures. At this clinic eye shields are placed before any periorbital pass; shielding the globe during eyelid and infrabrow radiofrequency is a described method in the literature, not an optional extra.
Can the neck be treated?
Yes, with the thyroid region left out. Avoiding the thyroid is standard practice for heat-based treatment on the neck rather than anything specific to this device. The doctor maps the area before starting.
What does the treatment feel like, and is there downtime?
Monopolar radiofrequency is felt as strong warm pulses with contact cooling on the handpiece, and energy is adjusted to what you tolerate rather than run at a fixed level. Mild redness or swelling usually settles within hours to a few days, and most people return to normal activities the same day, avoiding sauna and vigorous heat for 24 to 48 hours. Response varies between individuals.
Is XERF available at VERZO CLINIC in Bangkok?
The device is at the clinic. Because it is newly installed, this page describes how the technology works rather than quoting a price or a case history — the doctor assesses suitability at consultation and will say plainly if a different device or a non-device approach fits your face better. Consultation is free.
10ReferencesSourced from PubMed; every DOI below has been checked to resolve.
Ko K, Ryu HG, Park J, et al.
Computational modeling and histologic analysis of 6.78- and 2-MHz monopolar radiofrequency-induced thermal reactions.
Lasers in Medical Science. 2025;40(1):501.
Authors affiliated with the manufacturer.
Ryu HG, Kim C, Rho NK, et al.
Bioprinted human skin equivalent for evaluating non-invasive monopolar radiofrequency treatment: a novel approach.
Lasers in Medical Science. 2026;41(1).
Authors affiliated with the manufacturer.
Erlich G, Dahan E, Skorochod R, Wolf Y.
Dual-Frequency Non-invasive Monopolar Radiofrequency for Periorbital Tightening: Introduction of Novel Small Treatment Tips.
Cureus. 2026;18(1):e101187.
Describes XERF periorbital tips. Independent of the manufacturer; the authors state their observations are anecdotal.
Suh DH, Lee SJ, Song KY, et al.
Evaluation of improvement in skin laxity and oiliness after monopolar radiofrequency treatment: a pilot study utilizing multiple assessment tools.
Journal of Cosmetic Dermatology. 2025;24(10):e70463.
Human study, 32 patients, independent of this device.
Fritz K, Bernardy J, Tiplica GS, Machovcova A.
Efficacy of monopolar radiofrequency on skin collagen remodeling: a veterinary study.
Dermatologic Therapy. 2015;28(3):122-5.
Animal model, different device.