Collagen biostimulators

Hyaluronic acid occupies space, and the correction is there the moment the needle comes out. A biostimulator instead induces your body to build new collagen, so the meaningful correction appears over weeks to months and is made of your own tissue. The trade-off is reversibility — hyaluronic acid can be dissolved with hyaluronidase, and PLLA, CaHA and PMMA cannot.

There is a temporary fullness straight after injection from the diluent or gel carrier, and it subsides within about a week. Genuine collagen-driven change generally becomes visible from around 6 weeks and continues to build through 3 to 6 months. We assess a completed course 3 to 6 months after the final session.

In a randomised trial of PLLA against human collagen, investigator-rated improvement remained above 85% through month 25. CaHA correction is generally described as lasting 6 to 12 months in the controlled trials reviewed, and PMMA microspheres are non-resorbable and therefore permanent. Duration varies with the product, the dose, the area treated and how your own collagen responds.

PLLA is conventionally about 3 sessions spaced 4 to 8 weeks apart, though published protocols range from 1 to 7 depending on the area and the degree of volume loss. CaHA is more often a single session with periodic maintenance. We reassess the collagen response before deciding each subsequent dose rather than committing to a number in advance.

No. There is no enzymatic reversal agent for PLLA, CaHA or PMMA equivalent to hyaluronidase for hyaluronic acid. Overcorrection or misplacement is managed conservatively — intralesional steroid or 5-fluorouracil for inflammatory nodules, surgery in refractory cases — which is exactly why we dose conservatively and stage the sessions.

Palpable subcutaneous papules and nodules are the characteristic complication, most often with PLLA and most often in thin or highly mobile skin such as the perioral and periorbital areas, which is why the lip vermilion is avoided. Rates fell substantially once higher reconstitution volumes and longer hydration times became standard, reported at around 1% in one large series. Late-onset inflammatory nodules and granulomas have been described from 6 to 60 months after injection — long after you have flown home.

In Istanbul a session runs roughly €250 to €600 all-in, and because a course is normally 2 to 3 sessions, the realistic total is about €500 to €1,800. The American Society of Plastic Surgeons reports an average physician fee of $901 for non-hyaluronic acid fillers, but that is the surgeon's fee alone, per session, excluding facility and anaesthetic charges. The two numbers are not like-for-like, and a genuine US all-in figure per session would be higher.

Medically, yes. There is no wound, no general anaesthetic and no prolonged immobility, so the DVT reasoning behind post-surgical flight rules does not apply here — Cleveland Clinic puts the return to daily activities at immediately, with strenuous activity avoided for about 24 hours. We still prefer you keep 1 night, so we can look at your face in the morning rather than over a video call.

Only a physician. The Ministry of Health regulation on beauty and aesthetic-purpose health establishments (Resmî Gazete, 2003) restricts intradermal injection to specialists in dermatology or plastic, reconstructive and aesthetic surgery, or physicians separately certified by the Ministry, and expressly prohibits beauty specialists from performing any intradermal injection. An injection offered in a salon setting is outside that regulation, not a cheaper version of it.

Three different clocks matter here. In the first hours: pain out of proportion to an injection, or skin that turns white, dusky or net-patterned, can signal a blocked vessel — call us immediately — and any change in your vision is an emergency, so go to the nearest emergency department first and tell us on the way. In the first week: spreading redness or warmth, discharge from an injection point, or fever suggests infection rather than normal settling, which is bruising and tenderness that fades day by day. And months to years later: new firm lumps or recurring bouts of swelling in the treated area are exactly the late reactions described with these products, so send us photographs even when you are long home. We would rather review a picture of nothing than miss something.

No, and the distinction is worth being plain about. Biostimulators rebuild what has deflated — they thicken skin and restore diffuse volume by making your tissue produce collagen. They do not reposition what has descended: established jowls, folds caused by sagging rather than volume loss, and loose neck skin are structural problems that respond to surgical lifting, not to more vials. If what we see at your assessment is descent rather than deflation, we will say so and point you to the operation instead.

Anyone with an active infection, inflammation or an unhealed cold sore at or near the injection site: treatment waits until it has cleared, because injecting through infection carries it deeper. A known hypersensitivity to the device components rules a product out, and for PMMA so does a positive bovine collagen skin test — PMMA is also approved only from 21 upward. We are cautious where there is a history of keloid or hypertrophic scarring, or active autoimmune or connective-tissue disease, and we do not treat the lip vermilion or the thin skin around the eyes, where nodules cluster. Safety in pregnancy and while breastfeeding has not been established, so we postpone. And one non-medical exclusion worth saying out loud: if you cannot come back for the rest of the course, this is the wrong treatment to start.

€250 to €600 with us, confirmed after a consultation rather than quoted blind. For comparison it is typically £400 – £800 in the United Kingdom, $900 – $2,000 in the United States and €400 – €800 in Western Europe. Per vial, and the number of vials depends on how much volume has been lost. These work gradually over months, so a course is usually two or three sessions rather than one.