Write your store's popup content
How fractional RF rebuilds your skin from within.
Radiofrequency energy has been studied and clinically validated for over two decades. This page explains, in plain language, exactly what happens beneath the surface of your skin when you use the CELYRA Dot, and why the science supports lasting results.
What is radiofrequency energy?
Radiofrequency (RF) is a form of electromagnetic energy that operates at frequencies between 0.3 MHz and 10 MHz. Unlike laser light, which travels in a straight beam and can be absorbed or scattered by the skin's surface pigment, RF energy travels as an alternating electrical current through biological tissue.
When this current passes through skin, the tissue's natural resistance to the flow of electricity causes the molecules within it to vibrate rapidly. This molecular friction generates controlled, precise heat: not at the surface, but deep within the dermis, exactly where collagen fibres live.
Because RF energy is not affected by skin pigmentation or melanin content, it is safe and effective across all skin tones, a key advantage over many laser-based alternatives.
| Property | RF Energy |
|---|---|
| Frequency range | 0.3β10 MHz |
| Skin tone affected | No |
| Epidermis damage | None (non-ablative) |
| Downtime | None to minimal |
| Mechanism | Thermal collagen remodelling |
Why the dermis is the target.
Your skin is made up of three primary layers. The outermost layer, the epidermis, is a thin protective barrier. Below it lies the dermis, a thicker layer rich in collagen and elastin fibres that give skin its firmness, elasticity, and structure. Deeper still is the hypodermis, a layer of fat and connective tissue.
As we age, collagen production in the dermis naturally slows. From our mid-twenties, the body produces approximately 1% less collagen per year. Existing collagen fibres become disorganised, thinner, and less tightly packed, leading to the visible signs of skin laxity, fine lines, and wrinkles.
The CELYRA Dot targets the dermis specifically, delivering RF energy to a depth of 100β400 micrometres below the epidermis, precisely the zone where collagen fibres are most concentrated and where thermal stimulation has the greatest effect.
Three phases of skin renewal.
RF treatment triggers a precise, staged biological response. Each phase builds on the last, producing results that continue to improve for months after your session.
When RF energy heats the dermis to between 40β45Β°C, it disrupts the hydrogen bonds within the collagen triple-helix structure. This causes collagen fibrils to immediately contract and shorten, producing a visible tightening effect that can be felt right after treatment.
This is not damage. It is a controlled, targeted thermal response. The heat is precisely calibrated to denature collagen fibres without harming the surrounding epidermis or living cells.
The controlled thermal injury signals the body's natural wound-healing cascade. Fibroblasts, the skin cells responsible for producing collagen, are recruited to the treated area. Growth factors including TGF-Ξ² are released, stimulating these cells to begin synthesising new collagen.
This is the same biological process the body uses to repair tissue, but triggered in a controlled, targeted way, without any wound at the skin's surface.
Over the following weeks and months, the activated fibroblasts deposit new collagen types I and III into the dermal matrix. These fresh fibres are organised in a more structured, tightly packed arrangement, restoring the architecture of younger skin.
Clinical studies confirm that collagen synthesis continues to increase for at least 3 months post-treatment, meaning results improve progressively long after each session ends.
Immediate tightening from collagen contraction, followed by a progressive increase in dermal collagen density over months. Clinical histology confirms a statistically significant increase in collagen type I (+23.4%), collagen type III (+20.8%), and newly synthesised collagen (+75.8%) compared to baseline, measured 3 months after a course of treatment. (El-Domyati et al., J Am Acad Dermatol, 2011)
Why fractional RF is better.
Not all RF devices are the same. The CELYRA Dot uses fractional radiofrequency, a delivery method that treats only a fraction of the skin surface at a time, leaving surrounding tissue intact.
Rather than heating the entire skin surface uniformly, fractional RF creates discrete microscopic thermal zones (MTZs) in the dermis. Each zone triggers a localised collagen response, while the untreated tissue between zones acts as a reservoir of healthy cells that accelerates healing and recovery.
This approach produces more intense collagen stimulation per treated zone while dramatically reducing the risk of side effects compared to non-fractional full-coverage RF or ablative treatments.
The result is a treatment that is both more effective and safer than older, full-coverage RF technologies, with no downtime required.
Gold dots = treated thermal zones. Untreated surrounding tissue accelerates recovery and amplifies the collagen response.
What research shows.
The effectiveness of radiofrequency for skin tightening and collagen stimulation is supported by peer-reviewed clinical research published in leading dermatology journals. The following data is drawn from published studies on monopolar and fractional RF devices.
Reported at 3 months post-treatment in a controlled clinical study measuring skin tightening, texture, and wrinkle improvement.
El-Domyati et al., J Am Acad Dermatol, 2011
Increase in newly synthesised collagen measured histologically at 3 months post-treatment compared to baseline.
El-Domyati et al., J Am Acad Dermatol, 2011
Clinically assessed improvement in skin laxity at 3 months post-treatment.
El-Domyati et al., J Am Acad Dermatol, 2011
Immunohistochemical analysis confirmed a statistically significant increase in both collagen type I (+23.4%) and collagen type III (+20.8%) at the end of treatment, continuing to rise to 81.2% and 73.6% of dermal content respectively at 3 months post-treatment.
A key finding across multiple studies is that RF results are not immediate and static. They progressively improve for 3 months or more after a course of treatment. Patients who see modest results at the end of treatment often see their best results weeks later.
Unlike laser treatments, which carry a risk of post-inflammatory hyperpigmentation in darker skin tones, RF energy is not absorbed by melanin. Clinical studies confirm RF is safe and effective across all Fitzpatrick skin types (IβVI).
Research consistently demonstrates that multiple treatment sessions produce significantly better outcomes than a single session. Each session builds on the collagen remodelling initiated by the previous one, compounding results over time.
Data drawn from multiple peer-reviewed dermatology journals. Individual results may vary.
How RF compares to other options.
There are many approaches to skin tightening and anti-aging. Understanding how they differ helps you make an informed decision about what is right for your skin.
| Treatment | Targets Dermis | All Skin Tones | No Downtime | At-Home Use | Ongoing Collagen Stimulation |
|---|---|---|---|---|---|
| Fractional RF (CELYRA Dot) | β | β | β | β | β |
| Ablative Laser | β | β Pigment risk | β 7β14 days | β Clinic only | β |
| Non-ablative Laser | Partial | β Pigment risk | Minimal | β Clinic only | Moderate |
| Topical Retinoids | β Surface only | β | β | β | Mild |
| Microcurrent Devices | β Muscle only | β | β | β | β |
| Injectable Fillers | β Volumising only | β | 1β3 days | β Clinic only | β |
Designed to be safe for all.
One of the most significant advantages of RF energy over light-based treatments is its independence from skin pigmentation. Laser and IPL devices rely on chromophores (pigment molecules) to absorb energy, which means they can cause unintended heating of melanin in darker skin tones, leading to post-inflammatory hyperpigmentation or burns.
RF energy follows the path of least electrical resistance through tissue. It heats based on the electrical resistance properties of the dermis, not the colour of the skin above it. This makes it safe and effective across the full range of Fitzpatrick skin types.
RF energy heats the dermis without disrupting the epidermis. There is no ablation, no open wound, and no risk of surface scarring when used as directed.
Clinical studies report that side effects are typically limited to mild, transient erythema (redness) that resolves within hours. No significant adverse events were reported in peer-reviewed studies when devices were used according to protocol.
Unlike ablative procedures, fractional RF requires no downtime. Most users can return to their normal routine immediately after treatment. Some mild warmth or pinkness may be present for a few hours post-session.
