The Retatrutide Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
Retatrutide
Research hub
Reference writing for people who read certificates. Everything here concerns measurement: what a method tests, what a number means, and what documentation should accompany a material. Nothing here describes human use.
Compound database
Structured records: identity, chemistry, documentation state and regulatory status.
Browse compoundsVideo library
Research videos by category
17 embedded video references organised by research category and product. Videos play directly on this page; third-party content is provided for research context and is not reviewed as dosing, treatment or human-use guidance.
Weight Management
Compounds investigated for appetite, satiety and body-weight regulation signalling.
GLP-1 Stacks, HGH & Healing Protocols - Your Questions Answered | March 2026
The Hunter Williams Podcast
GLP-1 compoundsGrowth-hormone compoundsTissue-repair compounds
Fat Metabolism
Compounds studied in lipolysis, adipose-tissue and fat-metabolism research models.
The Tesamorelin Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
Tesamorelin
Metabolic Health
Compounds studied in glucose handling, insulin signalling and metabolic-rate research.
The MOTS-c Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
MOTS-c
The Retatrutide Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
Retatrutide
Muscle Growth
Compounds studied in muscle protein synthesis, hypertrophy and lean-mass research.
MGF and PEG-MGF Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
MGFPEG-MGF
Tissue Repair & Healing
Compounds studied in tissue repair, angiogenesis and wound-model research.
The GHK-Cu Masterclass | A Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
GHK-Cu
The BPC-157 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
BPC-157
The TB-500 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
TB-500
GLP-1 Stacks, HGH & Healing Protocols - Your Questions Answered | March 2026
The Hunter Williams Podcast
GLP-1 compoundsGrowth-hormone compoundsTissue-repair compounds
Recovery & Performance
Compounds studied in exercise recovery, endurance and physical-performance research.
MGF and PEG-MGF Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
MGFPEG-MGF
The BPC-157 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
BPC-157
The TB-500 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
TB-500
Healthy Ageing & Longevity
Compounds studied in cellular senescence, telomere and longevity research.
The NAD+ Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
NAD+
The Epitalon Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
Epithalon
The SS-31 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
SS-31
Skin, Hair & Cosmetic
Compounds studied in dermal matrix, pigmentation, collagen and follicle research.
Melanotan 1 and 2 Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
Melanotan IMelanotan II
The GHK-Cu Masterclass | A Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
GHK-Cu
The KPV Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
KPV
Growth Hormone
Secretagogue and releasing-factor materials studied in GH-axis research.
CJC-1295 Masterclass | A Complete Research Guide (2026)
The Hunter Williams Podcast
CJC-1295
The Ipamorelin Peptide Masterclass | A Complete Research Guide (2026)
The Hunter Williams Podcast
Ipamorelin
The Tesamorelin Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
Tesamorelin
GLP-1 Stacks, HGH & Healing Protocols - Your Questions Answered | March 2026
The Hunter Williams Podcast
GLP-1 compoundsGrowth-hormone compoundsTissue-repair compounds
Sleep & Stress
Compounds studied in sleep architecture, anxiolytic and stress-response research.
The DSIP Masterclass | A Researcher’s Guide to the Sleep Peptide (2026)
The Hunter Williams Podcast
DSIP
Immune & Gut Health
Compounds studied in immune modulation, inflammation and gastrointestinal research.
The Thymosin Alpha-1 Masterclass | Complete Researcher's Guide (2026)
The Hunter Williams Podcast
Thymosin Alpha-1
The KPV Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
KPV
Energy & Mitochondrial
Compounds studied in mitochondrial function, NAD+ biology and cellular-energy research.
The NAD+ Masterclass | A Research Guide (2026)
The Hunter Williams Podcast
NAD+
The MOTS-c Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
MOTS-c
The SS-31 Masterclass | Complete Researcher’s Guide (2026)
The Hunter Williams Podcast
SS-31
Latest
Recently published
New in the journal: a nine-part science series covering peptide signalling, receptor families, the history of peptide chemistry, mitochondrial-derived peptides and how to read the evidence base.
24 · 8 min
Reading peptide evidence critically
Preclinical versus clinical evidence, jurisdictional variation, and why a disclaimer is not a compliance position.
23 · 7 min
Melanocortin and neuropeptide receptor literature
MC1R to MC4R selectivity, and the neuropeptide research literature on Semax, Selank and related sequences.
22 · 7 min
Growth-hormone axis literature: two receptor routes
How GHRH analogues and ghrelin-receptor agonists differ mechanistically in the published research.
21 · 8 min
Angiogenesis and extracellular matrix literature
VEGF signalling, actin dynamics and copper-binding tripeptides as described in published tissue-model research.
20 · 7 min
Short peptide bioregulators and gene expression
The Khavinson bioregulator literature, what it claims, and how to read it against the wider evidence base.
19 · 8 min
Mitochondrial-derived peptides in the literature
Humanin, MOTS-c and mitochondria-targeted sequences: what the published research describes and where it stops.
18 · 10 min
A history of peptide chemistry, 1838 to the present
From Mulder naming protein to solid-phase synthesis, recombinant expression and the modern analytical era.
17 · 9 min
Receptor families and signalling cascades
A reference map of the receptor classes and second-messenger pathways most often named in peptide literature.