Category
Hyaluronic acid, Botulinum Toxin A, PLLA, PCL, lidocaine, hyaluronidase — molecular components.
18 terms
The active ingredients and product compositions category has become more important as patients increasingly ask "what is in this product?" rather than "which brand is it?". This category covers different botulinum toxin type A formulations (Onabotulinumtoxin A, Incobotulinumtoxin A, Abobotulinumtoxin A, Prabotulinumtoxin A); HA gel systems based on different cross-linking technologies (BDDE, VYCROSS, IPN-Like, NASHA); biostimulator molecules such as calcium hydroxylapatite (CaHA, Radiesse), poly-L-lactic acid (PLLA, Sculptra) and polycaprolactone (PCL, Ellansé); enzyme antidotes like hyaluronidase (HYAL); blood-derived products such as PRP and PRF; newer biostimulators based on exosomes and polynucleotides (PN); and the vitamin, peptide, coenzyme and amino-acid cocktails used in mesotherapy. Each molecule has a distinct mechanism of action, dosing unit, formulation profile and contraindication list; correct ingredient selection is the foundation of the "right product to the right region" principle in medical aesthetics. At Dr. Hamza Gemici’s clinic the manufacturer, lot number, expiry date and exact administered quantity of every applied product are documented in the patient file; product traceability is a foundational ethical and safety standard in medical aesthetics and is critical in the rare event of a product recall. Glossary entries in this category aim to teach patients which molecule does what, how it works mechanistically and when it is used — favouring biochemical mechanism over brand comparison.
Bakuchiol is a natural meroterpene compound obtained from the plant extract of Babchi seed (Psoralea corylifolia), a cosmeceutical active ingredient often marketed as a "natural retinol alternative" that induces retinol-like transcriptional gene expression patterns without directly activating the retinoid receptor.
Calcium hydroxyapatite (CaHA); It is an injection tool that has the same mineral composition found in natural bones and teeth, is added to filler products in microsphere form, and provides both instant filler volume and biostimulation with long-term collagen neogenesis.
Chemical peeling is a topical or clinical active treatment method based on peeling and renewing the skin surface in a controlled manner. It is an aesthetic dermatology procedure that provides acne, hyperpigmentation, fine lines and skin texture improvement by accelerating keratinocyte turnover through hydroxyl acids (AHA, BHA, PHA) and enzymes.
Daxxify; Botulinum toxin type A product, developed by Revance Therapeutics, containing a peptide stimulator (RTP-004) and approved by the FDA for cosmetic indication in 2022, used in the treatment of glabellar wrinkles; It is a longer-acting alternative to Botox, with an effect duration of up to 6 months.
Dysport is a muscle-nerve blocking injection treatment containing the active ingredient Botulinum toxin type A (abobotulinumtoxin-A) produced by Ipsen, approved by FDA (2009) and TITCK, which reduces dynamic wrinkles by blocking facial expression muscles; It is known as a Botox alternative.
Moisturizer is a topical product that reduces the skin's trans-epidermal water loss (TEWL) and supports the skin barrier; It is a daily skin care product that should be selected and applied according to skin type, in lotion/cream/balm/ointment format, divided into three basic component categories: occlusive (prevent water loss), humectant (absorb water) and emollient (soften).
Hyaluronic acid (HA), the active ingredient used in dermal fillers, is a high molecular weight glucosaminoglycan polymer composed of β-1,4-D-glucuronic acid and β-1,3-N-acetyl-D-glucosamine repeating disaccharide, occurring naturally in the body; It is the most commonly used filler in facial filler in aesthetic injections, increasing skin hydration and volumetricity.
Hyaluronidase is an enzyme that depolymerizes the hyaluronic acid (HA) polymer and converts it into disaccharides and monomers; It is a pharmaceutical/medical application usually offered in animal origin or recombinant form, used to urgently reverse the undesirable results of HA fillers (overfilling, Tyndall effect, vascular occlusion, asymmetry, nodules) in aesthetic injections.
Jeuveau; Evolus Inc. It is a botulinum toxin type A neurotoxin injection treatment, containing prabotulinumtoxin-A, produced by Daewoong Pharmaceutical (South Korea), marketed by Daewoong Pharmaceutical (South Korea), approved by the FDA in 2019 primarily for cosmetic indication (glabellar lines), has a dose equivalent to Botox, has a rapid onset of effect (2-3 days) and is positioned with an economical price.
Niacinamide (nicotinamide) is the amide form of Vitamin B3 and is the active ingredient in cosmeceutical serums that strengthens the skin barrier, provides sebum regulation, inhibits melanin transfer and supports collagen synthesis; As a NAD+/NADP+ precursor, it is active in cellular energy metabolism.
Peptide serum are cosmeceutical active substances consisting of short-chain amino acid sequences (typically 2-50 amino acids, mostly 3-6), which trigger collagen and elastin synthesis, inhibit neurotransmitter release or prevent enzymatic degradation; They form the main component of the bulk in topical serum formulations used against signs of aging (wrinkles, loss of skin tension, fine lines).
Poly-L-Lactic acid (PLLA); Known under the trade name Sculptra, it is a synthetic polymer of the L-isomer of lactic acid naturally found in the body, and is a long-term (2-3 years) biostimulator filler that triggers fibroblast activation and collagen neogenesis through microparticles injected under the skin, and is based on the macrophage-mediated foreign body reaction mechanism, not direct volumization.
Retinol is the pre-vitamin form of Vitamin A1 (C20H30O), which is metabolized into retinal and retinoic acid in the skin and provides increased cellular turnover, collagen synthesis stimulation, melanin inhibition and anti-photoaging effects through nuclear receptors, and is the gold standard anti-aging active ingredient of the cosmetic industry.
Skin cleanser is a skincare product that removes sebum, sweat, make-up, dirt and environmental pollution from the facial skin with pH-compatible surfactants; It is in foam, milky, micellar, oil-based or balm form and fulfills its cleaning duty by protecting the skin barrier.
SPF (Sun Protection Factor) is a numerical indicator that measures the degree of protection of the skin from the UVB spectrum of sun rays. SPF 30 filters 97% of UVB rays, and SPF 50 filters 98%, through chemical (avobenzone, octinoxate, organic) or physical (zinc oxide, titanium dioxide, mineral) UV filters; broad-spectrum protection (UVA + UVB) and regular renewal (2 hours) are required.
Toner is a liquid product that balances the pH of the skin after cleansing and acts as a residue cleaner. It is divided into the categories of traditional astringen (alcohol-based, for aged skin) vs modern hydration tonic (glycerin + hyaluronic acid) vs exfoliating tonic (AHA 4-7%, BHA 2% — active exfoliating agent).
Vitamin C serum is a cosmeceutical serum formulation containing L-ascorbic acid or its derivatives (sodium ascorbyl phosphate, magnesium ascorbyl phosphate, tetrahexyldecyl ascorbate); It is a dermocosmetic topical product class that provides anti-aging, brightening and UV protective effects with its antioxidant, collagen synthesis stimulating and melanin inhibition properties.
Xeomin (Incobotulinumtoxin-A), produced by Merz Aesthetics (Germany), containing the active substance botulinum toxin type A, purified from the complex protein structure (pure neurotoxin); It is a neuromuscular blocking injection treatment that was approved by the FDA in 2011 for aesthetic glabellar lines and is known for its low immunogenicity profile.
Different botulinum toxin type A formulations (Onabotulinumtoxin A, Incobotulinumtoxin A, Abobotulinumtoxin A, Prabotulinumtoxin A) share the same core mechanism of action, but they differ in molecular weight, the presence or absence of complexing proteins, diffusion tendency, dose-conversion ratios and onset of action. For example, Incobotulinumtoxin A is sometimes described as the "naked toxin": stripped of complexing proteins, with a theoretically lower risk of antibody formation. Abobotulinumtoxin A typically uses a 1:2.5 - 1:3 dose ratio. In practice, what matters more than the brand for an experienced injector is how the dose is calibrated and placed. Excellent results are achievable with several brands; the choice is made for the patient, the region and the injector’s experience.
The cross-linking technology of HA fillers directly influences longevity, kinetic compatibility and tissue integration. BDDE (1,4-butanediol diglycidyl ether) is the most widely used cross-linker and underpins most HA lines. VYCROSS technology cross-links low and high molecular-weight HA chains together for longer duration and a more natural integration, used in the Juvederm Vycross range (Voluma, Volift, Volbella). IPN-Like (Stylage) and NASHA (classic Restylane) take different approaches. In practice these differences inform whether a softer, more dynamic product or a firmer, higher-G' product is required for a given region. For the patient, the most important point is not the brand name but whether the chosen product matches the indication.
Hyaluronidase is an enzymatic antidote that dissolves HA fillers. It is used in emergencies such as malpositioned filler, overfilling, nodules, delayed-onset reactions and, most importantly, vascular occlusion — where rapid administration within the "golden hour" is critical. For this reason, any clinic performing HA filler should keep an adequate supply of hyaluronidase as part of its emergency protocol; this is a basic ethical standard. Dose is titrated to the filler type and the problem; some protocols recommend a skin test due to allergy risk. Hyaluronidase does not dissolve biostimulator fillers (CaHA, PLLA, PCL), which is why product selection at the planning stage is critical.
Both molecules are biostimulator fillers, providing immediate volume plus stimulation of collagen and elastin neogenesis. PLLA (poly-L-lactic acid, Sculptra) dissolves in water as fine particles, onset is slow (2-4 months) and durability averages around 2 years; it is favoured for broad, soft volume needs (cheeks, temples, décolletage). CaHA (calcium hydroxylapatite, Radiesse) is higher viscosity and gives faster contour, performing well in regions where structural support is needed (jawline, chin, décolletage, dorsum of the hand). The decision is based on region, the preferred trade-off between fast contour and slow soft volume, and the patient’s skin thickness — a consultation is essential.
PRP (platelet-rich plasma), PRF (platelet-rich fibrin) and newer exosome- and polynucleotide-based biostimulators are used for skin rejuvenation, hair loss management, post-procedural healing and collagen stimulation. PRP / PRF are autologous (derived from the patient’s own blood), giving an excellent safety profile. Exosomes and polynucleotides are exogenous and their regulatory status can differ by country. Patient expectations need to be realistic — these products do not create volumetric change, they support skin quality and cellular renewal. Results typically develop over 2-3 sessions and become visible within 3-6 months. Candidate selection, product authenticity and application protocol are key variables; an in-person consultation is essential.