“Skin booster” has become one of those catch all terms that gets used for almost any injectable that isn’t a traditional dermal filler. Patients come into clinic asking for “a skin booster” the way they might ask for “a facial”, without necessarily knowing that there are now eight genuinely different treatments hiding under that one label, each working through its own biological mechanism, each suited to a different skin concern.
Choosing the wrong one isn’t dangerous, but it can mean paying for a treatment that was never going to solve the problem you actually have. Someone with genuinely crepey, sun damaged skin on the neck needs something quite different from someone who just wants a bit more glow before a wedding. So here’s what each of these eight treatments actually is, how it works, and who I think it suits, based on what I see week to week in clinic.
Juvelook & Lenisna
Juvelook and Lenisna are two strengths of the same underlying idea, a hybrid of hyaluronic acid with PDLLA, or poly D,L lactic acid, microspheres. The HA element gives an immediate hydration and glow on the day, while the PDLLA slowly biodegrades over the following weeks, acting as a steady collagen stimulus. Juvelook is the gentler of the pair, and I tend to use it for earlier laxity, fine lines or delicate areas such as under the eyes. Lenisna is denser and better suited to more established laxity or areas that need real structural support, such as the jawline. Patients tend to like that there’s something visible from day one rather than a long wait, with the collagen driven firming building on top of that over a course of two to three sessions, four weeks apart, and lasting anywhere from twelve to eighteen months or more depending on which product is used.
JULÄINE
JULÄINE is a poly L lactic acid biostimulator using LaSynPro technology, and it sits at the more structural end of the spectrum. The PLLA microspheres prompt the body to lay down genuine Type I collagen over several weeks, giving a diffuse tightening effect across the face without adding perceptible volume. It suits widespread facial laxity where a patient specifically doesn’t want to look “filled”, and results from a course of three sessions can last eighteen months or more. I think it’s still underused in the UK relative to how effective it is.
Hyperdilute Radiesse
Hyperdilute Radiesse takes a filler most people know for adding volume and uses it in almost the opposite way. By diluting the calcium hydroxyapatite well beyond its usual strength, sometimes as far as one part filler to six parts saline depending on how thin the skin is, the aim shifts entirely away from volume and towards biostimulation. The microspheres act as a scaffold under the skin, encouraging fibroblasts to lay down fresh Type I collagen over the following months rather than sitting there as a filling agent. I find it particularly useful for genuinely lax, crepey skin on the neck, jawline or body areas such as the upper arms and abdomen, where a patient wants a firmer feel rather than anything obviously “done”. It typically needs two to three sessions four to six weeks apart, with results building over several months and lasting around a year. Unlike the HA based treatments on this list, it cannot be reliably dissolved with hyaluronidase, so it’s one I only use once a patient fully understands what they’re committing to.
HarmonyCa
HarmonyCa is a genuine hybrid: crosslinked hyaluronic acid combined with calcium hydroxyapatite microspheres and lidocaine. The HA gives an immediate lift and volume on the day, while the CaHA works quietly in the background over the following two to three months, stimulating the skin’s own collagen and elastin. I use this for mild to moderate laxity in the mid and lower face where a patient wants to see something straight away but also wants the longer term biostimulatory benefit, and results can last twelve to eighteen months or longer.
Polynucleotides
Polynucleotides are purified DNA fragments, most commonly derived from salmon, which sounds unusual the first time patients hear it but has a strong evidence base behind it. Once injected, they activate fibroblasts, calm inflammation and encourage the skin to produce its own collagen and elastin. I find these particularly useful for skin that is reactive, sun damaged or inflamed, including acne scarring and rosacea prone skin, where a more mechanical filler based approach would only aggravate things. Results build gradually over a course of three to four sessions, and tend to last six to twelve months.
SuneKOS
SuneKOS combines low molecular weight hyaluronic acid with six amino acids, the actual building blocks of collagen and elastin, which triggers dermal biogenesis rather than just hydrating the skin from the outside in. This is one I reach for when elasticity, rather than simple dryness, is the main complaint, particularly on crepey under eye skin, the neck and the backs of the hands. Patients usually notice an early improvement after two or three sessions of a typical three to four session course, with results lasting six to nine months.
SkinVive by Juvéderm
SkinVive uses Vycross technology to deliver lightly crosslinked hyaluronic acid as tiny intradermal microdroplets. It’s the most straightforwardly cosmetic of the group, aimed purely at surface skin quality: glow, hydration and smoothness, without touching facial structure. It suits a wide age range and is quick to show results, often visible within days of a single session. Because it’s HA based, it can also be dissolved with Hyalase if ever needed, which I always think is worth mentioning to slightly anxious first time patients.
Profhilo
Profhilo remains one of the most established names in this category. It’s a high concentration, non crosslinked hyaluronic acid using NAHYCO technology, which spreads freely through the tissue rather than staying put, deeply hydrating the skin while stimulating collagen, elastin and the skin’s own HA production. It suits broader laxity and thinning across the face and neck rather than a single problem area. A course of two sessions four weeks apart shows its most noticeable results four to eight weeks after the second treatment, lasting six to nine months.
So which one is right for you?
None of these eight treatments adds significant volume, and none will address moderate to advanced structural change on its own, that’s still the territory of dermal filler or, occasionally, surgery. But within the world of skin quality, the differences are real and worth understanding before you book anything.
An immediate refresh with progressive collagen building behind it is Juvelook for a gentler effect, or Lenisna where more structural support is needed. Diffuse structural tightening without volume points towards JULÄINE. Genuinely lax, crepey skin wanting firmness without volume suits Hyperdilute Radiesse. Wanting an immediate lift alongside longer term biostimulation suits HarmonyCa. Reactive, inflamed or sun damaged skin points towards polynucleotides. Elasticity concerns suit SuneKOS. A quick, reliable glow suits SkinVive. And the tried and tested all rounder for hydration and bioremodelling is Profhilo.
The honest answer is that the best treatment is the one matched properly to your skin, not the one trending on social media that month. I always recommend a proper consultation before committing to any course, so we can look at your skin together and work out which of these genuinely suits you, rather than guessing from a list.
At a glance
| Treatment | What It Is | How It Works | Primary Goal | Best For | Results | Sessions | Duration | Best Areas | Reversible | Downtime |
|---|---|---|---|---|---|---|---|---|---|---|
| Juvelook & Lenisna | Hybrid injectables combining hyaluronic acid with PDLLA (poly D,L lactic acid) microspheres; Lenisna is the denser, higher strength version of Juvelook | HA gives an immediate hydration and glow effect while the PDLLA particles slowly biodegrade and act as a collagen stimulus, prompting the skin to rebuild its own structural support | Dual action treatment combining an immediate refresh with progressive, collagen driven firming | Juvelook suits early laxity, fine lines and delicate areas such as under the eyes; Lenisna suits more established laxity and areas needing more structural support, such as the jawline and mid face | Immediate glow from the HA; progressive firming builds over 2 to 3 sessions | 2 to 3 sessions, around 4 weeks apart | 12 to 18 months or longer, depending on which is used | Face, under eyes, jawline, neck, décolletage, hands | Partially; the HA element can be softened with hyaluronidase, the PDLLA cannot | Minimal; occasional mild swelling or bruising, make up can usually be worn the next day |
| JULÄINE | Poly L lactic acid (PLLA) biostimulator with LaSynPro technology | PLLA microspheres activate fibroblasts for Type I collagen production | Progressive pure collagen rebuilding without volume | Diffuse facial laxity; structural improvement desired without volume | Gradual; 6 to 12 weeks onward | 3 sessions, 3 to 4 weeks apart | 18+ months | Full face, nasolabial folds, neck, décolletage | No; biodegrades naturally | Minimal; 24 to 48 hours |
| Hyperdilute Radiesse | Calcium hydroxyapatite (CaHA) diluted well beyond standard strength, typically 1:2 to 1:6 with saline and often lidocaine, depending on skin thickness | Diluted CaHA microspheres spread through the dermis as a scaffold, prompting fibroblasts to lay down new Type I collagen and elastin rather than sitting as a volumising deposit | Skin tightening and firmness through pure biostimulation, without adding bulk | Crepey, lax skin on the lower face, neck, décolletage or body areas; patients wanting a firmer, lifted feel rather than filled lines | Gradual; early change from around 6 to 8 weeks, continuing to build for several months | 2 to 3 sessions, 4 to 6 weeks apart | Around 12 months | Lower face and jawline, neck, décolletage, upper arms, abdomen, knees | No; calcium hydroxyapatite cannot be reliably dissolved with hyaluronidase | Minimal; some bruising or swelling for a few days |
| HarmonyCa | Crosslinked HA plus calcium hydroxyapatite (CaHA) microspheres with lidocaine | HA provides immediate lift and volume; CaHA triggers progressive collagen and elastin biostimulation | Immediate structural lift plus long term collagen and elastin biostimulation | Mild to moderate facial laxity in the mid or lower face; immediate and lasting results desired | Immediate from HA; ongoing over 2 to 3 months from CaHA | One session | 12 to 18+ months | Mid and lower face: cheeks, pre jowl, jawline | Partially; the HA can be dissolved, the CaHA cannot | Minimal; possible swelling or bruising |
| Poly Nucleotides | Purified DNA fragments (salmon derived) | Activates fibroblasts, reduces inflammation, stimulates collagen and elastin | Cellular regeneration, tissue repair, anti-inflammation | Sun damaged, inflamed, reactive skin; acne scarring; rosacea | Gradual; builds over course | 3 to 4 sessions, 2 to 4 weeks apart | 6 to 12 months | Face, under eyes, neck, décolletage | No dedicated dissolving agent | Minimal; 24 to 48 hours |
| SuneKOS | Low molecular weight HA plus six amino acids (collagen and elastin building blocks) | Amino acids trigger dermal biogenesis; simultaneous collagen and elastin production | Collagen and elastin regeneration; hydration; elasticity improvement | Fine lines, crepey skin, elasticity loss, under eyes, neck, hands | Gradual; early improvement after 2 to 3 sessions | 3 to 4 sessions, 7 to 14 days apart | 6 to 9 months | Face, under eyes, neck, décolletage, hands | No dedicated dissolving agent | Minimal; 24 to 48 hours |
| SkinVive by Juvéderm | Lightly crosslinked HA (Vycross technology) as intradermal microdroplets | Crosslinked HA attracts and retains water in the dermis for improved texture | Surface skin quality: glow, hydration, smoothness, texture refinement | Improved glow and smoothness without structural change; wide age range | Quick; visible within days | One session; optional top up at 4 weeks | 6 to 9 months | Cheeks primarily; neck and décolletage as part of a broader plan | Yes; can be dissolved with Hyalase | Minimal; hours to 2 days |
| Profhilo | High concentration (64mg/2ml) non crosslinked HA using NAHYCO technology | Free spreading HA deeply hydrates; stimulates collagen, elastin and HA bioremodelling | Deep hydration, bioremodelling, improved skin firmness and elasticity | Skin laxity, thinning, loss of firmness across face or neck; diffuse bioremodelling | Gradual; most noticeable 4 to 8 weeks after the second session | Two sessions, 4 weeks apart | 6 to 9 months | Face, neck, décolletage | Yes; can be dissolved with Hyalase | Minimal; 24 to 48 hours |
