Compounds & Therapies
Astaxanthin
A powerful carotenoid antioxidant supporting eye health, athletic recovery, and cardiovascular function
Collagen
Hydrolyzed peptides supporting skin, joint, and connective tissue health through targeted amino acid delivery
Dutasteride
5-alpha reductase inhibitor: approved for BPH, off-label for androgenetic alopecia
Finasteride
5-Alpha Reductase Inhibition for Prostate Health and Hair Preservation
GHK-Cu (Copper Peptide)
Cosmetic Peptide With Topical Benefits and Injectable Research Status
GHK-Cu (Copper Tripeptide): A Practical Guide
Overview GHK-Cu (glycyl-L-histidyl-L-lysine copper(II)) is a naturally occurring copper-binding tripeptide first isolated from human plasma albumin by Loren Pickart in 1973. GHK is present in human plasma (200 ng/mL at age 20, declining to 80 ng/mL by age 60), saliva, and urine, and is…
Lysine
An essential amino acid supporting collagen synthesis, immune function, and herpes simplex virus management
Minoxidil
FDA-approved OTC topical for hair loss; oral off-label but increasingly prescribed
Oral Minoxidil (Low-Dose)
Minoxidil is a potassium channel opener originally developed as an antihypertensive in the 1970s. The hair-growth side effect was noticed quickly; topical minoxidil was approved for androgenetic alopecia in 1988 and became the dominant…
Saw Palmetto
Traditional herbal extract with EMA monograph for prostate and urinary health
Setipiprant
Setipiprant is a small-molecule antagonist of the prostaglandin D2 receptor 2 (DP2, also called CRTH2). It was originally developed as a potential treatment for asthma and allergic disorders due to PGD2's role in inflammatory responses. In 2012, a…
Topical Finasteride and Dutasteride
Oral finasteride (1 mg/day) and oral dutasteride (0.5 mg/day) are the most-evidenced medical therapies for male androgenetic alopecia. Both work by inhibiting 5-alpha reductase, the enzyme that converts testosterone to the more potent…
Vitamin C (Oral)
Antioxidant and collagen synthesis cofactor for immunity and connective tissue health
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…
Azelaic Acid
Azelaic acid is available in FDA-approved prescription formulations: Finacea 15% (for mild to moderate rosacea) and Azelex 20% (for mild to moderate acne vulgaris).
Bakuchiol
Plant-derived cosmetic; not drug-regulated; retinol alternative marketed globally
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…
Chemical Peels (AHAs/BHAs)
OTC superficial peels are cosmetics; professional/medical peels are regulated procedures
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…
Hyaluronic Acid
Topical cosmetic (unregulated); injectable fillers FDA-cleared as medical devices (not drug-approved)
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…
Microneedling
Device-regulated procedure; professional devices cleared; home devices <0.5mm less regulated
Niacinamide (Topical)
Well-tolerated cosmetic ingredient; anti-inflammatory and barrier support
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…
PRP for Skin & Hair
Device-regulated autologous procedure; PRP device FDA-cleared but aesthetic applications investigational
PRP Injections (Joint & Soft Tissue)
Device-regulated centrifuge; procedure unregulated; emerging evidence for joint pain and tendinopathy
Red Light (Low-Level Laser) Therapy
Device-regulated; FDA-cleared for pain and wound healing; off-label anti-aging and cognitive use emerging
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…
Sunscreen & UV Protection
FDA OTC drug monograph; EU offers wider filter options; US lags in approved filters
Topical Vitamin C
Antioxidant cosmetic ingredient; not drug-regulated globally, quality varies enormously
Tretinoin (Retinoids)
Gold standard retinoid for photoaging and acne; prescription-only globally
Protocols & Reference
Acne: A Practical Protocol
At a Glance Acne vulgaris is the most common skin condition globally, affecting up to 85% of individuals at some point in their lives and persisting into adulthood in a significant portion of cases. Effective treatment requires matching intervention to acne type — comedonal, inflammatory, or…
Hair Loss Prevention & Growth Protocol
Evidence-based multi-compound protocol for androgenetic alopecia addressing DHT, micro-inflammation, and hair growth signaling
Skin and Hair Optimization
Protocol Guide Series / April 2026 / FOR VANGUARD MEMBERS ONLY — Protocol Skinhairoptimization
Practices & Lifestyle
Aloe Vera: A Practical Guide
Overview Aloe barbadensis miller (aloe vera) is a succulent plant whose gel and latex have been used medicinally for over 5,000 years. The inner gel (mucilage) contains acemannan (a polysaccharide), sterols, vitamins, minerals, and amino acids—responsible for wound healing, immune modulation…
Alpha Arbutin: A Practical Guide
At a Glance Alpha arbutin is a glycosylated derivative of hydroquinone found naturally in bearberry, cranberry, and pear plants. It is a well-tolerated, evidence-supported tyrosinase inhibitor used for brightening hyperpigmentation, melasma, and post-inflammatory dark spots. Its primary…
Biotin (Vitamin B7): A Practical Guide
Overview Biotin is a water-soluble B vitamin (B7) that functions as a covalently attached cofactor for five mammalian carboxylase enzymes, all involved in critical metabolic pathways: gluconeogenesis, fatty acid synthesis, amino acid catabolism, and the citric acid cycle. Biotin is widely…
Collagen Peptides: A Practical Guide
At a Glance Collagen peptides (hydrolyzed collagen) are short-chain amino acid sequences derived from enzymatic hydrolysis of animal collagen,
Exosome Biologics: A Practical Guide
Overview Exosomes are nanosized (30–150 nm diameter) extracellular vesicles secreted by virtually all mammalian cells through the endosomal pathway. They contain a complex cargo of: microRNAs (miRNAs), messenger RNAs (mRNAs), proteins (enzymes, growth factors, transcription factors), lipids…
GLA (Gamma-Linolenic Acid): A Practical Guide
Overview Gamma-linolenic acid (GLA) is an 18-carbon omega-6 fatty acid with 3 double bonds (18:3n-6) that represents the first elongation/desaturation step downstream of linoleic acid (LA). Unlike the pro-inflammatory arachidonic acid (AA) pathway that dominates most omega-6 metabolism, GLA is…
Gotu Kola (Centella asiatica): A Practical Guide
Overview Gotu kola (Centella asiatica) is a slender, creeping herb native to tropical Asia and Africa, used in both Ayurvedic and Traditional Chinese Medicine. Its bioactive triterpene compounds—asiaticoside, madecassoside, asiatic acid, and madecassic acid (collectively called…
Hair Transplant — FUE, FUT, and Robotic ARTAS
Hair transplantation moves hair from a donor area at the back and sides of the scalp (which is genetically resistant to DHT-mediated miniaturization) to a recipient area at the front and crown (which is not). The transplanted hairs retain their…
Ketoconazole Shampoo for AGA
Ketoconazole is an imidazole antifungal medication. As a topical shampoo (typically 2% ketoconazole in the United States as Nizoral, 1% as Nizoral A-D OTC, with various international generics), it is FDA-approved for treatment of seborrheic…
L-Proline
Category: Amino Acids Tags: Amino Acids, Collagen, Connective Tissue, Wound Healing, Joint Health Key Takeaways - Proline is the structural amino acid essential to collagen triple-helix stability; without adequate vitamin C, both proline and lysine hydroxylation fail — producing defective…
Melasma & Hyperpigmentation: A Practical Guide
At a Glance Melasma is a chronic, relapsing hyperpigmentation disorder characterized by symmetric brown-gray patches on sun-exposed areas, predominantly the face. It is driven by the interaction of UV radiation, genetic susceptibility, and hormonal triggers (particularly estrogen and…
PABA (Para-Aminobenzoic Acid): A Practical Guide
Overview Para-aminobenzoic acid (PABA) is an organic compound that was once considered a B vitamin (sometimes labeled vitamin Bx) but is no longer classified as a vitamin because it has no defined essential function in human metabolism that cannot be met by other means. PABA is a precursor to…
Pycnogenol: A Practical Guide
Overview Pycnogenol is a patented, standardized extract from the bark of the French maritime pine (Pinus pinaster), manufactured by Horphag Research. It is a complex mixture of procyanidins (oligomeric proanthocyanidins), catechins, phenolic acids (ferulic acid, caffeic acid), and taxifolin.
Pyrilutamide (KX-826)
As of mid-2026, Kintor reports that the pivotal Phase III stage in China met its primary endpoint with statistically significant and clinically meaningful efficacy in male AGA; a 52-week long-term safety Phase III also met endpoint. US Phase II positive. NDA planned in China.
Stem Cell Interventions: A Practical Guide
Overview Stem cell therapy encompasses a broad spectrum of interventions involving the administration of cells with self-renewal capacity and the ability to differentiate into specialized cell types — ranging from FDA-approved, rigorously tested blood stem cell transplantation (hematopoietic…
Topical Peptide Complexes: A Practical Guide
At a Glance Topical peptides are short-chain amino acid sequences designed to signal specific cellular activities in the skin — primarily stimulating collagen and elastin production, reducing dynamic wrinkle depth, or delivering mineral cofactors for structural protein synthesis. The most…
Topical RU58841
RU58841 (also called PSK-3841) is a non-steroidal topical antiandrogen developed by Roussel Uclaf (later Sanofi) in the late 1980s and 1990s as a topical treatment for androgenetic alopecia (AGA, male and female pattern hair loss). It is a pure…
Tranexamic Acid: A Practical Guide
At a Glance Tranexamic acid (TXA) is a synthetic lysine derivative originally developed as an antifibrinolytic drug for surgical hemostasis. Topically and orally at low doses, it has emerged as one of the better-supported ingredients for treating melasma and hyperpigmentation, acting through…
Vitamin A (Retinol & Retinyl Esters): A Practical Guide
Overview Vitamin A is a fat-soluble micronutrient essential for vision, immune function, cellular differentiation, and reproductive health. The term "Vitamin A" encompasses a family of structurally related compounds: preformed vitamin A (retinol, retinyl esters, retinoic acid — found in animal…