Reference
Skincare Ingredient Glossary: Plain-English Definitions for Anti-Aging Terms
- Acetyl Hexapeptide-8 (Argireline)
- A six-amino-acid synthetic peptide that partially inhibits neurotransmitter release at facial muscle junctions, reducing the contractions that deepen expression lines. Often described as a "topical Botox" — the mechanism is related but the effect is smaller in scale. Used in South Beach Skin Lab at a meaningful concentration alongside SNAP-8. Read more →
- Acetyl Octapeptide-3 (SNAP-8)
- An eight-amino-acid peptide targeting the same SNARE complex mechanism as Argireline, with manufacturer data suggesting greater efficacy at lower concentrations. Used in combination with Argireline for a dual-approach to expression line reduction. Read more →
- AHA (Alpha Hydroxy Acid)
- A class of water-soluble acids (glycolic, lactic, mandelic, malic) that loosen the bonds between dead skin cells, accelerating their shedding and revealing newer cells underneath. Effective for brightening, texture improvement, and mild collagen stimulation. Can cause irritation in sensitive or post-menopausal skin at high concentrations.
- Ascorbic Acid
- The pure, active form of vitamin C. A potent antioxidant and essential cofactor in collagen synthesis. Highly effective but unstable — oxidises rapidly on exposure to air and light, turning yellow or orange. Requires airtight, opaque packaging. Ascorbyl glucoside and ascorbyl tetraisopalmitate are more stable derivatives.
- Ascorbyl Glucoside
- A stable vitamin C derivative that converts to active ascorbic acid on contact with skin enzymes. Less potent than pure ascorbic acid but significantly more stable in formulations. Delivers antioxidant protection, brightening, and collagen synthesis cofactor support without the degradation issues of pure vitamin C.
- Ceramides
- Lipid molecules that form a major component of the stratum corneum's barrier structure. They act like mortar between the skin cell "bricks," preventing water loss and blocking entry of irritants. Ceramide levels decline with age, contributing to the drier, more reactive skin common in mature women. Topical ceramides help restore barrier integrity.
- Collagen
- The most abundant structural protein in skin, providing firmness, plumpness, and resistance to deformation. Production declines from around age 25 and accelerates sharply after menopause — skin loses approximately 30% of its collagen in the first five years post-menopause. Note: topical collagen in skincare does not penetrate skin — the molecules are too large. Collagen stimulation through peptides and retinoids is the evidence-based approach. Read more →
- Elastin
- A structural protein that gives skin its elasticity — the ability to return to its original shape after being stretched or compressed. Like collagen, elastin production declines with age. Loss of elastin contributes to sagging and the failure of skin to "spring back" after facial movements. Peptide-based skincare can support elastin synthesis alongside collagen.
- Emollient
- An ingredient that softens and smooths the skin surface by filling in the spaces between skin cells and reducing transepidermal water loss. Examples: squalane, jojoba oil, shea butter, cetyl alcohol. Distinguished from humectants (which draw water in) and occlusives (which seal the surface). Read more →
- Fibroblast
- The primary collagen-producing cell in the dermis. Fibroblasts synthesise collagen, elastin, and hyaluronic acid. Their activity is stimulated by signal peptides (matrikines) and retinoids. As skin ages, fibroblast activity declines. Many anti-aging actives work by directly or indirectly stimulating fibroblast collagen output. Read more →
- GMP (Good Manufacturing Practice)
- A set of manufacturing standards enforced by regulatory agencies (including the FDA in the US) that ensure products are consistently produced and controlled to quality standards. A GMP-certified manufacturing facility follows strict protocols for ingredient sourcing, production, testing, and packaging. South Beach Skin Lab is manufactured in an FDA-registered, GMP-certified US facility.
- Humectant
- An ingredient that attracts and binds water molecules, drawing moisture into the skin from the environment and deeper skin layers. Examples: sodium hyaluronate, glycerin, urea, panthenol. Most effective when combined with an emollient or occlusive that prevents the drawn moisture from evaporating from the skin surface.
- Hyaluronic Acid (HA)
- A naturally occurring polysaccharide found throughout the body, with the highest concentrations in skin and joints. It can bind up to 1,000 times its weight in water. Topical HA acts as a humectant, drawing water into the skin and temporarily plumping fine dehydration lines. Production declines with age. Sodium hyaluronate (the salt form, with smaller molecular weight) penetrates skin more effectively than standard HA.
- INCI (International Nomenclature of Cosmetic Ingredients)
- The standardised system for naming cosmetic ingredients used on labels worldwide. Ingredients are listed in descending order of concentration — the first ingredient listed is present at the highest concentration, the last at the lowest. Understanding INCI order is the most practical tool for evaluating product quality independent of marketing claims.
- Matrikine Peptides
- Peptides that mimic the short protein fragments produced when collagen breaks down, triggering the skin's natural repair response — increased collagen and elastin synthesis by fibroblasts. The Matrixyl family (Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-5) are the most studied commercial matrikines. One of the most credible topical approaches to structural anti-aging. Read more →
- Matrixyl 3000
- A proprietary peptide combination (Palmitoyl Tripeptide-1 + Palmitoyl Tetrapeptide-7) developed by Sederma. One of the most studied peptide complexes in cosmetic science, with multiple published studies demonstrating collagen synthesis stimulation and wrinkle depth reduction. Included in South Beach Skin Lab's formula. Read more →
- MMP (Matrix Metalloproteinase)
- Enzymes that break down collagen and other extracellular matrix proteins. UV radiation is a primary trigger for MMP production — UV-induced collagen breakdown is a major driver of photoaging. Antioxidants (vitamins C and E, niacinamide) and some peptides suppress MMP activity, protecting existing collagen from enzymatic degradation.
- Niacinamide
- A form of vitamin B3 with multiple skin benefits: reduces transepidermal water loss by strengthening the barrier, diminishes hyperpigmentation by inhibiting melanin transfer, reduces pore appearance, and has anti-inflammatory properties. Well-tolerated by most skin types and compatible with most other actives. Used prominently in Olay Regenerist formulas.
- Occlusive
- An ingredient that forms a physical barrier on the skin surface, preventing water evaporation (transepidermal water loss). Examples: petrolatum, beeswax, shea butter, dimethicone. Occlusives seal in the moisture provided by humectants and emollients. Essential in dry or barrier-compromised skin — including post-menopausal skin — to maintain hydration.
- Palmitoyl Peptides
- Peptides with a fatty acid (palmitic acid) chain attached, which increases their ability to penetrate the lipid-rich stratum corneum. The most common signal peptides in anti-aging skincare: Palmitoyl Tripeptide-1, Palmitoyl Tripeptide-5, Palmitoyl Tetrapeptide-7, Palmitoyl Pentapeptide-4. The palmitoyl modification is a deliberate formulation decision to improve bioavailability. Read more →
- Peptide
- A short chain of amino acids (2–50) that functions as a biological messenger in skin. In anti-aging skincare, peptides are used to signal collagen synthesis (signal/matrikine peptides) or reduce expression-line-driving muscle contractions (neurotransmitter-inhibiting peptides). Efficacy depends on type, concentration, and formulation quality — not the number of peptides listed on the label. Read more →
- Retinol
- A vitamin A derivative that converts to retinoic acid in skin cells. One of the most extensively studied anti-aging actives — it stimulates collagen synthesis, accelerates cell turnover, and suppresses collagen-degrading enzymes. Highly effective but commonly causes irritation (peeling, redness, dryness), particularly in post-menopausal and sensitive skin. Requires daily SPF use. Prescription tretinoin (direct retinoic acid) is more potent. Read more →
- SNARE Complex
- The molecular machinery at the neuromuscular junction that enables acetylcholine release from nerve terminals, triggering muscle contraction. Botulinum toxin works by cleaving SNAP-25, a SNARE protein. Argireline and SNAP-8 work by competing with SNAP-25 for SNARE complex assembly — a partial, reversible inhibition. The shared target is why these peptides are compared to Botox. Read more →
- Sodium Hyaluronate
- The sodium salt form of hyaluronic acid. Has a smaller molecular weight than standard hyaluronic acid, allowing deeper penetration into the epidermis. Functions as a humectant — draws water into skin cells and the spaces between them, plumping dehydration lines and improving overall skin moisture content. Found in South Beach Skin Lab's formula.
- Squalane
- A stable, hydrogenated derivative of squalene — a natural compound found in human sebum and plant sources (sugarcane, olive). Non-comedogenic, rapidly absorbing, and oxidatively stable. Closely mimics the skin's natural sebum composition, making it particularly effective for post-menopausal skin where sebum production has declined. Suitable for all skin types. Read more →
- Stratum Corneum
- The outermost layer of the skin — a complex structure of dead skin cells (corneocytes) embedded in a lipid matrix of ceramides, fatty acids, and cholesterol. Its primary function is as a barrier: preventing water loss and blocking entry of environmental irritants. The efficiency of the stratum corneum declines with age and after menopause. Many skincare ingredients must penetrate this barrier to reach the living skin cells where they have biological effect.
- Transepidermal Water Loss (TEWL)
- The passive loss of water through the skin surface by evaporation. Elevated TEWL indicates a compromised or inefficient skin barrier. TEWL increases with age and after menopause as the stratum corneum lipid structure weakens. Barrier-restoring ingredients (ceramides, squalane, fatty acids) and occlusives (shea butter, petrolatum) reduce TEWL by strengthening or sealing the barrier.
- YMYL (Your Money or Your Life)
- A classification used by Google's search quality guidelines to identify content types — including health, beauty, and financial topics — where inaccurate or misleading information could meaningfully harm readers. Skincare and anti-aging content is classified as YMYL, which is why Google's ranking algorithms weight E-E-A-T (experience, expertise, authoritativeness, trustworthiness) signals particularly heavily for sites in this category. Read more →