HArmonyCa London has become one of the most talked-about injectables of 2026, and for good reason. It is the first dual-action hybrid filler that combines hyaluronic acid with calcium hydroxyapatite, giving you both immediate lift and long-term collagen stimulation in a single treatment. At Rejuva London on 15 Harley Street, our doctor-led team uses HArmonyCa to address the natural loss of structure and firmness that comes with age, particularly along the cheeks, jawline, and chin.
This guide walks you through what HArmonyCa actually does, the kind of results you can expect, what it costs in London, how it compares to Sculptra and Radiesse, and the questions our patients ask most often during consultations on Harley Street.
What Is HArmonyCa?
HArmonyCa is a hybrid injectable developed by Allergan Aesthetics, the same company behind Juvéderm. It is described as a hybrid because it combines two ingredients that, until recently, were only used separately:
- Cross-linked hyaluronic acid (HA) for immediate volume, hydration, and lift
- Calcium hydroxyapatite (CaHA) microspheres that act as a biostimulator, prompting your skin to produce its own new collagen over the following months
The result is a two-stage benefit. In the first few weeks you see the lifting and contouring effect of the HA. Over the following three to six months, the CaHA microspheres trigger neocollagenesis, which gradually improves skin firmness and elasticity. Most patients describe it as looking lifted and refreshed rather than filled.
HArmonyCa is licensed in the UK as a prescription medical device and must be administered by a qualified medical practitioner. At Rejuva London it is performed only by our injecting doctors, not by aestheticians.
HArmonyCa Before and After: What Results Can You Expect?
HArmonyCa results unfold in two phases.
In the immediate phase, the hyaluronic acid component restores volume and gives the treated area a softer, lifted contour. You will notice this within 24 to 72 hours, once any minor swelling settles. Most patients describe a refined jawline, a tightened lower face, and a more defined facial contour.
In the regenerative phase, the calcium hydroxyapatite continues to work for months. From around week four onward, the skin in the treated area begins to feel firmer, and the long-term collagen response improves elasticity and overall skin quality. The peak collagen-stimulated effect is usually seen at three to four months, and total results typically last 12 to 18 months depending on the area treated, your metabolism, and how well you look after your skin afterwards.
At your consultation we take standardised before-and-after photographs in our Harley Street clinic so you can track your own progress objectively over the months that follow.
How Much Does HArmonyCa Cost in London?
HArmonyCa is priced per syringe in London, and the total cost depends on how many syringes you need and which areas are being treated. Most patients need one to two syringes for an initial treatment, with a possible top-up at the four-to-six-week mark.
Across London, HArmonyCa typically ranges between £550 and £1,200 per syringe. Clinics on Harley Street and in central London tend to sit at the higher end of that range because the treatment is performed by injecting doctors rather than nurses or aestheticians. At Rejuva London, we provide a written, itemised quote at the consultation so you understand exactly what you are paying for, with no pressure to commit on the day.
A standard cooling-off period is offered before any injectable treatment so you have time to consider, ask follow-up questions by email, and decide in your own time.
What Happens During Your HArmonyCa Treatment at Rejuva London?
A typical HArmonyCa appointment at our Harley Street clinic takes around 45 to 60 minutes from start to finish.
The consultation comes first. Our doctor assesses your facial structure, skin quality, and the areas you want to address. We review your medical history, any previous injectables, and your aesthetic goals. If HArmonyCa is the right product for you, we map out the injection points on your skin. If a different product or combination would suit you better, we will say so, even if it means recommending Profhilo, Sculptra, or a hyaluronic acid filler instead.
Numbing cream is applied for around 15 minutes to keep the procedure comfortable. The injection itself takes about 10 to 15 minutes per side, using either a needle or a cannula depending on the area. You may feel a brief pinch or pressure, but most patients describe the discomfort as mild.
Afterwards you can return to most daily activities. Mild swelling, redness, or small bruises can appear and usually resolve within three to seven days. We provide written aftercare instructions and a direct line of contact for any follow-up questions.
HArmonyCa vs Sculptra: Which Hybrid Filler Is Right for You?
This is one of the most common questions we hear during HArmonyCa consultations on Harley Street. Both treatments stimulate collagen, but they work in different ways.
HArmonyCa combines hyaluronic acid (immediate effect) with calcium hydroxyapatite (long-term collagen stimulation). You see lift and contour right away, and the collagen-stimulated improvement builds over the following months. It tends to suit patients who want both an immediate result and a longer-term regenerative effect, with focused treatment areas such as the jawline, chin, and cheeks.
Sculptra contains poly-L-lactic acid (PLLA), a pure biostimulator with no immediate volumising agent. Results build gradually over three or more sessions spaced about a month apart, and the full effect typically appears three to six months after the final session. Sculptra is well suited to patients with diffuse volume loss who are comfortable waiting for a gradual, natural-looking change.
A quick comparison:
- Immediate result: HArmonyCa, yes. Sculptra, no, gradual only.
- Sessions needed: HArmonyCa, often one with optional top-up. Sculptra, usually two to three sessions.
- Duration: HArmonyCa, 12 to 18 months. Sculptra, up to 2 years.
- Best for: HArmonyCa for jawline, chin, and cheek contouring. Sculptra for overall volume restoration and skin quality.
For a more detailed comparison including Radiesse, we cover all three regenerative injectables in your consultation and recommend the one that fits your face, budget, and timeline.
Who Is HArmonyCa Suitable For?
HArmonyCa is most appropriate for adults in their late 30s and above who are starting to notice loss of facial definition, mild skin laxity along the jawline or cheeks, or a softening of the lower face. It is also a popular choice for patients in their 50s and 60s who want a non-surgical alternative to a lower facelift.
It is not suitable if you are pregnant or breastfeeding, have active skin infection in the treatment area, have a known hypersensitivity to any of the components, or have certain autoimmune conditions. Our doctor will go through your full medical history at the consultation to confirm whether HArmonyCa is safe and appropriate for you.
Why Choose Rejuva London for HArmonyCa?
Aesthetic medicine in the UK is still partially self-regulated, so the clinic and practitioner you choose matter more than the product itself. At Rejuva London our HArmonyCa treatments are performed only by GMC-registered doctors with specific training in regenerative and structural injectables. We do not allow this treatment to be performed by nurses or aestheticians.
What we offer at 15 Harley Street, Marylebone:
- Doctor-led consultations and treatments
- A purpose-built clinical setting with hospital-grade hygiene standards
- A written, itemised quote with no pressure to commit on the day
- A standard cooling-off period before any injectable
- Honest advice, including saying no when HArmonyCa is not the right product for you
Frequently Asked Questions
How long does HArmonyCa last?
Most patients see results lasting 12 to 18 months. The hyaluronic acid component is gradually metabolised, while the collagen stimulated by the calcium hydroxyapatite microspheres continues to support the skin even after the filler itself has dissipated.
Does HArmonyCa hurt?
Most patients describe the procedure as a mild to moderate discomfort. We apply numbing cream beforehand and use a cannula where appropriate to minimise bruising and pain. You may feel pressure or a brief pinch, but anaesthesia beyond topical numbing is rarely needed.
Can HArmonyCa be dissolved if I do not like the result?
The hyaluronic acid portion can be partially dissolved with hyaluronidase, but the calcium hydroxyapatite portion cannot. This is why product placement and injector experience matter so much. At Rejuva London our doctors are conservative by design and aim for a result that looks like a refined version of you, not a different face.
When can I see the final result?
The immediate lift is visible within 24 to 72 hours of treatment. The collagen-stimulated effect builds gradually and peaks at around three to four months. We schedule a review appointment at four weeks and again at three months to monitor your progress.
Can HArmonyCa be combined with other treatments?
Yes. HArmonyCa pairs well with skin boosters such as Profhilo for overall skin quality, with anti-wrinkle injections for the upper face, or with Thermage FLX for additional non-surgical skin tightening. Your doctor will recommend a treatment plan based on your goals and skin condition.
Book Your HArmonyCa Consultation at Rejuva London
If you are considering HArmonyCa London and want a doctor-led assessment with no pressure to commit, we are based at 15 Harley Street, Marylebone, London W1G 9QQ. Your consultation includes a full facial assessment, a written quote, and an honest recommendation, whether that is HArmonyCa, a different injectable, or no treatment at all.
