HarmonyCa London

HarmonyCa at Volt Cartel

HarmonyCa at Volt Cartel is an injectable biostimulator that combines 1.25% hyaluronic acid with 45% calcium hydroxyapatite (CaHA) in a single formulation — delivering both immediate soft-tissue support from the HA component and progressive collagen stimulation from the CaHA microspheres over the months following treatment. It is one of the few injectable products to combine an immediate volumising effect with a true biostimulatory mechanism in a single injection session, making it a clinically useful option for patients who want both immediate structure and longer-term quality improvement from a single product.

The calcium hydroxyapatite microspheres in HarmonyCa act as a scaffold for fibroblast attachment, stimulating the production of collagen types I and III and elastin in the surrounding tissue. This stimulation continues for months after the HA component has been metabolised, producing a progressive improvement in skin quality, firmness, and elasticity that extends beyond the expected duration of the HA alone. The product is designed for structural areas — the mid-face, cheeks, jawline, and lower face — and is injected at the subdermal or supraperiosteal level depending on the treatment location.

HarmonyCa is not a standard dermal filler and is not used for fine surface lines or lip enhancement. Its indications are in the structural areas of the face where both support and long-term biostimulation are the goal.

What HarmonyCa can help with

HarmonyCa may be appropriate for patients seeking mid-face volume restoration with an extended biostimulatory benefit; jawline definition combined with skin quality improvement; structural support in the lower face where skin thinning and soft-tissue deflation are both present; patients who respond well to CaHA (Radiesse) but want the additional benefit of the HA component for more immediate aesthetic effect; or patients who want to reduce the frequency of maintenance appointments by choosing a product with a longer effective duration. Suitability is confirmed at consultation based on facial anatomy, treatment area, and whether a biostimulatory approach is appropriate for the patient’s concern.

How HarmonyCa treatment is planned

At consultation, your clinician will assess the areas of concern, the degree of volume loss, skin quality and thickness, and whether HarmonyCa’s specific mechanism and indications align with the patient’s goals. Because HarmonyCa is placed at depth in structural areas, the consultation includes an assessment of the facial anatomy to determine safe and appropriate placement planes and the volumes required. The product cannot be dissolved with hyaluronidase in the same way as a standard HA filler — the CaHA component does not dissolve with hyaluronidase, though the HA component does. This means the approach is more conservative and precise than with a pure HA filler.

Clinical photography is taken before treatment. A review appointment is offered at four to six weeks to assess the initial outcome and the early biostimulatory response before any further treatment is discussed.

Suitability, safety, and treatment intensity

HarmonyCa is not suitable for patients who are pregnant or breastfeeding, have an active infection in the treatment area, have a history of anaphylaxis or severe allergy to any component of the formulation, or have a skin condition or anatomical feature that contraindicates deep structural injection in the area being treated. Because the CaHA component cannot be fully dissolved, patient selection and planning are conducted more carefully than with fully reversible HA fillers.

Vascular safety in the mid-face and lower face is a clinical priority. The facial vascular anatomy — including the angular artery, facial artery, and their branches — is considered in all placement decisions. HarmonyCa is typically delivered with a cannula to reduce the risk of intravascular injection in the deep structural planes. Hyaluronidase is always stocked in clinic for emergency use with the HA component.

What happens during HarmonyCa treatment

The appointment typically takes 30 to 45 minutes. The treatment area is cleansed and topical anaesthetic applied where relevant. HarmonyCa is injected using a cannula technique in most structural areas, entering through a small entry point and directing the product along the planned placement plane at depth. The product contains lidocaine to reduce discomfort progressively during the procedure. Patients typically experience pressure and mild discomfort during cannula movement.

After treatment, the injected areas may appear slightly more full than the intended final result due to swelling. Swelling typically resolves over three to seven days. Mild bruising is possible at the cannula entry site and typically resolves within one to two weeks. The full biostimulatory effect develops progressively over two to three months as the collagen response builds.

Results, courses, and maintenance

HarmonyCa produces a dual timeline of results: the immediate structural support from the HA component, visible within the first two to four weeks as swelling settles, and the progressive collagen biostimulation from the CaHA component, which continues to develop over two to three months and sustains the result beyond what the HA alone would provide. In most patients, the combined effect lasts 12 to 18 months, with some patients experiencing longer duration as the biostimulatory collagen remains after the carrier has been metabolised.

A review at four to six weeks assesses the initial outcome. Maintenance depends on individual response and the area treated — most patients return at 12 to 18 months for reassessment and a repeat session where indicated.

Pricing: HarmonyCa pricing per session depends on the area being treated and the protocol recommended for your skin concerns. A full quote is provided at your consultation.

How HarmonyCa Compares to Similar Treatments

HarmonyCa is a hybrid biostimulator combining calcium hydroxylapatite with hyaluronic acid. It is commonly compared to Profhilo and standard dermal fillers, as all three can address volume loss and skin quality — but they differ in mechanism and appropriate use cases.

The choice between HarmonyCa, Profhilo, and standard fillers depends on the balance of volume loss and skin quality decline a patient presents with. See our Profhilo and Dermal Fillers pages for further information on the alternatives.

Why choose Volt Cartel in Shoreditch

HarmonyCa is a versatile product that suits specific patients and specific anatomical goals. At Volt Cartel, it is recommended when the patient’s presentation — the areas of concern, the degree of volume loss, and the skin quality — aligns well with the product’s mechanism and indications. Where a standard HA filler, Profhilo, or Morpheus8 would better serve the patient’s goal, your clinician will say so rather than recommend HarmonyCa because it is available.

The clinic is in Shoreditch, East London. HarmonyCa treatment is preceded by a thorough clinical consultation and followed by a review appointment included as standard in the treatment cycle.

Doctor’s Note

HarmonyCa is a calcium hydroxyapatite filler that combines immediate volume correction with a longer-term biostimulatory effect, where the calcium microspheres trigger collagen production over several months. I use it selectively — it suits patients who want the efficiency of one product doing two jobs, and it’s particularly useful in the mid-face, cheeks, and jawline. It isn’t reversible with hyaluronidase, so the assessment and planning process is more involved than with standard HA fillers.

— Dr Nino Rionidze, Lead Doctor & Clinic Manager, Volt Cartel Shoreditch