The PeakedLabs Journal
Evidence-based guides on performance optimization, hormone therapy, and peptide protocols — written to help you compare before you commit.
Treatments
14 min
When exogenous testosterone shuts down the HPT axis, gonadorelin and HCG offer two distinct rescue paths. HCG mimics LH directly at the testes; gonadorelin fires pulses upstream from the hypothalamus. Choosing between them depends on your fertility timeline, how your provider monitors the axis, and which compounding pharmacies your clinic uses.
Sexual Health
13 min
Most men notice PT-141 effects within 45–90 minutes of injection, with a peak arousal window from 2–4 hours and total effect duration up to 12 hours. Timing, dose, injection site, and individual metabolism all influence when it kicks in.
Sexual Health
13 min
PT-141 acts on the brain's melanocortin system to drive sexual desire and arousal — it does not touch blood flow at all. Viagra acts on penile vasculature through PDE5 inhibition. Same symptom, opposite mechanism, very different patient profiles. Here is the full 2026 comparison.
Peptides
13 min
Hexarelin triggers growth hormone release through ghrelin receptor activation — and uniquely, it also binds cardiac receptors directly to exert cardioprotective effects independent of GH. It's the most potent GHRP with the shortest desensitization window. Here's what the evidence shows.
Peptides
16 min
AOD-9604 targets fat metabolism without affecting growth or IGF-1 levels — and it completed Phase IIb human trials. Here is what the evidence actually shows, how it compares to semaglutide, and whether it fits your protocol.
Peptides
17 min
Selank is one of the only nootropic peptides with substantial human clinical trial data behind it — over 800 patients across multiple trials. It reduces anxiety without sedation, enhances memory consolidation, and modulates stress response via BDNF and serotonin pathways. Here is what the evidence actually shows.
Peptides
18 min
Semax is one of the most studied nootropic peptides available — developed by Russian scientists, approved in Russia and Ukraine, and used clinically for stroke recovery, cognitive decline, and cognitive enhancement. It sharpens focus, drives motivation, and enhances working memory. Here is what the evidence actually shows.
Peptides
19 min
Dihexa is a pro-cognitive peptide derived from the angiotensin IV analog Nle1-angiotensin IV. Preliminary research suggests it is among the most potent synaptogenic compounds studied — 10 million times more potent than BDNF itself at driving synaptogenesis in hippocampal models. Here is what the evidence actually shows, what the cautions are, and how it fits alongside Semax and Selank.
Treatments
19 min
Most testosterone treatments suppress your natural hormonal axis. Clomid stimulates it. Here's how clomiphene citrate works for men with low testosterone, what the evidence shows, and when it's the right choice versus TRT.
Peptides
16 min
Melanotan II activates melanocortin receptors to drive tanning, libido, and appetite suppression simultaneously. It's widely used but unlicensed. Here's what the evidence shows and what the risks actually are.
TRT Education
18 min
Testosterone pellets are rice-grain-sized implants inserted under the skin that deliver steady hormone levels for 3–6 months. Here is what the evidence says about who they work best for.
Peptides
17 min
DSIP is one of the oldest sleep-research peptides, originally isolated in 1974. It modulates delta-wave sleep, blunts cortisol reactivity, and interacts with testosterone and GH axes. Here is what the evidence actually shows — and who it is likely to help.
Peptides
21 min
Epithalon is one of the most-studied longevity peptides in existence — with over four decades of research from the St. Petersburg Institute of Bioregulation. It works by activating telomerase, extending telomere length, and regulating melatonin production. Here's what the evidence actually shows.
Treatments
19 min
HCG mimics LH in men, keeping the testes active when exogenous testosterone shuts the natural hormonal axis down. Whether you're on TRT and want to preserve fertility, or seeking an alternative to TRT that maintains your natural production, HCG is a cornerstone of advanced hormone optimization.
Peptides
13 min
Thymosin Alpha-1 is one of the most clinically validated immune-modulating peptides available. Approved in 37+ countries for chronic hepatitis and cancer immune support, it's now used in longevity medicine to restore T-cell function and combat inflammatory aging.
Hormones
14 min
Kisspeptin is the master regulator sitting above the HPT axis — the signal that triggers GnRH, LH, FSH, and ultimately testosterone production. For men with low testosterone, fertility goals, or interest in preserving testicular function, kisspeptin is the upstream lever most protocols ignore.
Longevity
19 min
NAD+ levels drop nearly 50% by age 60, impairing cellular energy, DNA repair, and sirtuin activity. This guide breaks down the evidence for IV NAD+, NMN, and NR supplementation — and explains who benefits most from each approach.
Peptide Therapy
19 min
TB-500 is a synthetic peptide fragment of Thymosin Beta-4 — a naturally occurring protein critical to tissue repair. This guide breaks down what the research actually shows for muscle, tendon, and soft tissue recovery, and how it compares to BPC-157 for injury healing.
Treatments
17 min
Most testosterone treatments suppress sperm production. Enclomiphene is the exception — it raises testosterone by stimulating your own hormonal axis, leaving fertility intact. Here's what the evidence shows, who's the right candidate, and how to access it.
Peptides
18 min
GHK-Cu is a naturally occurring copper-binding peptide that declines sharply with age — and decades of research show it plays a direct role in collagen synthesis, wound healing, and anti-inflammatory signaling. Here's what the evidence actually shows and how to use it.
Peptide Therapy
18 min
Peptide therapy is one of the fastest-growing segments in longevity medicine — but evidence quality varies wildly by peptide. This guide grades six major anti-aging peptides on actual clinical evidence and explains what the research does and doesn't support.
GLP-1 for Men
15 min
Mounjaro produces significantly more weight loss than Ozempic in head-to-head and parallel trials. But the right choice depends on how much weight you need to lose, your insurance coverage, your side-effect tolerance, and — if you're a man concerned about hormones — which drug better preserves lean mass and testosterone.
TRT Education
22 min
Testosterone replacement therapy (TRT) is one of the most searched — and most misunderstood — topics in men's health. This guide explains everything from diagnosis and delivery methods to real costs and how to choose a clinic in 2026.
TRT Guides
19 min
Most men who say TRT 'didn't work' for them were either under-dosed, mis-timed, or dealing with a solvable optimization problem. This guide covers the most common signs your protocol has a fixable problem, and exactly how to troubleshoot each one.
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