Procedures & Modalities
Adapalene: A Practical Guide
At a Glance Adapalene is a third-generation synthetic retinoid that became available over-the-counter in the US at 0.1% concentration (Differin) in 2016 — a significant regulatory change that made one of the most clinically validated acne and anti-aging actives accessible without a…
Ceramides & Barrier Repair: A Practical Guide
At a Glance Ceramides are the structural backbone of the skin's barrier — they make up approximately 50% of the lipids in the stratum corneum and are a central determinant of barrier integrity and transepidermal water loss, alongside cholesterol and free fatty acids. Age-related ceramide…
Exosomes for Skin and Hair
Exosomes are nanoscale (30-150 nm) extracellular vesicles released by virtually all cell types as a normal mechanism of intercellular signaling. They carry a defined cargo of proteins, lipids, mRNA, and microRNAs that reflects the parent cell's…
Hypochlorous Acid Skincare
Hypochlorous acid (HOCl) is an endogenous molecule produced by neutrophils as part of the innate immune system's pathogen defense. It is a potent oxidizing agent that kills bacteria, fungi, and viruses through oxidation of microbial proteins, while…
Mandelic Acid
Mandelic acid is an alpha-hydroxy acid (AHA) derived from bitter almonds. It is structurally similar to glycolic acid and lactic acid but with a substantially larger molecular structure (152.15 g/mol vs glycolic at 76 g/mol). The larger molecule…
Methylene Blue (Topical)
Methylene blue (methylthioninium chloride) is a phenothiazine dye first synthesized in 1876 and used clinically for over a century — as a treatment for methemoglobinemia (FDA-approved indication), as a urinary tract analgesic, and as a surgical dye…
Polylactic Acid (Sculptra) Biostimulator
Sculptra (poly-L-lactic acid, PLLA) is an injectable biostimulator developed by Sanofi-Aventis (now Galderma). Unlike hyaluronic acid (HA) fillers, which physically occupy volume at injection sites, Sculptra works by triggering a controlled…
Polynucleotides (Rejuran and Analogs)
Polynucleotides (PN) are short fragments of DNA, typically extracted from the gonadal tissue of Pacific salmon, processed to produce a defined molecular-weight range of nucleotide chains. The most-recognized branded product is Rejuran…
Retinaldehyde: A Practical Guide
At a Glance Retinaldehyde (retinal) is the intermediate form of vitamin A that sits between retinol and retinoic acid (tretinoin) in the retinoid conversion pathway — one enzymatic step away from the active form the skin actually uses. This position in the pathway gives it a clinical profile…