Peptides
9 min
KPV Peptide for Gut Inflammation: 2026 Evidence Guide
KPV is an anti-inflammatory tripeptide with preclinical gut-healing signals and oral activity, but no human trials yet. Here is what the 2026 evidence actually supports.
The PeakedLabs Journal
Research, protocols, and provider comparisons
Evidence-based guides on performance optimization, hormone therapy, and peptide protocols — written to help you compare before you commit.
Peptides
18 min
Ipamorelin Dosage and Protocol Guide: Injection, Timing, and Cycle (2026)
Ipamorelin is typically dosed at 200–300 mcg per injection, administered subcutaneously at bedtime (fasted) to maximize growth hormone pulse amplitude. This protocol guide covers standard dose ranges, injection technique, timing, cycle structure, stacking with CJC-1295, and what labs to monitor.
Peptides
18 min
Sermorelin Dosage and Protocol Guide: Injection, Timing, and Cycle (2026)
Sermorelin is typically dosed at 0.2–0.3 mg (200–300 mcg) per injection, administered subcutaneously at bedtime to align with the body's natural growth hormone pulse. This protocol guide covers standard dose ranges, injection technique, timing rationale, cycle structure, stacking with ipamorelin or CJC-1295, and what labs to monitor.
TRT & Health
18 min
Testosterone and Type 2 Diabetes: What the Evidence Shows (2026 Guide)
Low testosterone and type 2 diabetes co-occur in 25–40% of men with T2DM. TRT consistently improves HbA1c, fasting glucose, and insulin sensitivity in hypogonadal diabetic men across multiple RCTs — including Hackett et al. (2016) showing −0.4% HbA1c vs placebo. Here is what the evidence shows.
Peptides
21 min
CJC-1295 + Ipamorelin Stack: Protocol, Dosing, Results, and What to Expect (2026 Guide)
The CJC-1295 + Ipamorelin stack is the most commonly prescribed growth hormone peptide combination in telehealth clinics. By combining a GHRH analog (CJC-1295) with a ghrelin receptor agonist (Ipamorelin), the stack stimulates GH release through two complementary pathways — producing a synergistic pulse that exceeds either peptide alone. Here is what the evidence and clinical experience show about protocols, dosing, results, and realistic expectations.
Peptides
16 min
BPC-157 Dosage and Protocol Guide: Injection, Timing, and Cycle (2026)
BPC-157 dosing depends on route (injection vs oral), target (systemic vs local), and the condition being treated. This protocol guide covers standard dosing ranges, injection technique, timing windows, cycle structure, and what to monitor.
Peptides
20 min
TB-500 Dosage and Protocol Guide: Injection, Timing, and Cycle (2026)
TB-500 dosing uses a two-phase approach: a loading period at higher doses followed by a lower maintenance phase. This protocol guide covers standard dosing ranges, injection technique, cycle structure, stacking strategies, and what clinical monitoring responsible prescribers require.
Hormone Health
20 min
Testosterone and Thyroid: How These Two Hormones Affect Each Other (2026)
Low testosterone and thyroid dysfunction share overlapping symptoms and bidirectional hormonal mechanisms. This guide covers SHBG, the HPG-HPT axis crosstalk, when to suspect both conditions, and how treatment of one affects the other.
TRT & Health
23 min
Testosterone and Inflammation: What the Evidence Shows (2026 Guide)
Low testosterone and chronic inflammation are closely linked — and the relationship runs in both directions. Low T elevates CRP, IL-6, TNF-α, and other inflammatory markers. Chronic inflammation suppresses testosterone production. TRT, when used appropriately, consistently reduces inflammatory burden. Here is the full evidence base.
Peptides & Compounds
20 min
5-Amino-1MQ: What the Evidence Shows for Fat Loss and NAD+ Metabolism (2026 Guide)
5-Amino-1MQ is an NNMT inhibitor with compelling fat loss and metabolic data in animal models. It works by increasing intracellular NAD+ levels in adipose tissue and reactivating metabolically dormant fat cells. Human data is limited — but for men interested in metabolic optimization, here is the full evidence picture.
TRT & Health
18 min
Testosterone and Metabolic Syndrome: What the Evidence Shows (2026 Guide)
Low testosterone and metabolic syndrome are deeply intertwined — each worsens the other. Up to 40% of men with metabolic syndrome have clinically low testosterone. TRT consistently improves insulin sensitivity, waist circumference, triglycerides, and blood pressure in hypogonadal men. Here is what the evidence shows.
Peptides
19 min
Cerebrolysin Peptide: What the Evidence Shows for Cognitive Function and Neuroprotection (2026 Guide)
Cerebrolysin is a porcine brain-derived peptide preparation containing low-molecular-weight neuropeptides and free amino acids that mimic the activity of endogenous neurotrophic factors. It is one of the most clinically studied neuropeptides in the world — with 200+ clinical trials spanning stroke, traumatic brain injury, Alzheimer's disease, and vascular dementia. Here is what the evidence actually shows.
Peptides
22 min
MOTS-c Peptide: What the Evidence Shows for Metabolism, Mitochondria, and Longevity (2026 Guide)
MOTS-c is encoded in your mitochondrial genome — not the nuclear DNA that most peptides target. It regulates cellular energy metabolism, enhances insulin sensitivity, and triggers stress-adaptive pathways that parallel the effects of exercise and caloric restriction. In 2026, it's one of the most research-backed emerging longevity peptides.
Peptides
23 min
Humanin Peptide: What the Evidence Shows for Neuroprotection and Longevity (2026 Guide)
Humanin was discovered inside the mitochondrial genome of an Alzheimer's patient who never developed the disease. Since then, it's emerged as one of the most powerful neuroprotective peptides known — protecting neurons from amyloid-beta toxicity, lowering IGF-1, reducing inflammatory cytokines, and extending lifespan in animal models. In 2026, it's a cornerstone of serious longevity protocols.
Peptides
22 min
Tesamorelin Peptide: What the Evidence Shows for GH, Fat Loss, and Cognition (2026 Guide)
Tesamorelin is the only peptide in the growth hormone-releasing hormone (GHRH) class with full FDA approval — cleared for visceral fat reduction in HIV-associated lipodystrophy. That FDA approval means it has more robust clinical trial data behind it than virtually any other GH peptide. In 2026, it's one of the most evidence-backed tools in performance medicine for visceral fat loss, body composition, and emerging cognitive applications.
Peptides
19 min
LL-37 Peptide: What the Evidence Shows for Immune Defense, Wound Healing, and Inflammation (2026 Guide)
LL-37 is your body's frontline antimicrobial peptide — the only human cathelicidin, capable of directly killing bacteria, viruses, and fungi while modulating the broader immune response. In peptide medicine, it's emerging as a serious immune optimization and wound-healing tool.
Treatments
18 min
Gonadorelin vs HCG for Men on TRT: Which Keeps Fertility Intact? (2026)
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
16 min
How Long Does PT-141 Take to Work? Onset, Duration, and Dosage Timing (2026)
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
17 min
PT-141 vs Viagra: Which Is Better for Erectile Dysfunction? (2026 Comparison)
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
17 min
Hexarelin Peptide: What the Evidence Shows for Growth Hormone and Cardiovascular Function (2026 Guide)
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
20 min
AOD-9604: What the Evidence Shows for Fat Loss and Metabolism (2026 Guide)
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
21 min
Selank Peptide: What the Evidence Shows for Anxiety and Cognitive Function (2026 Guide)
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
21 min
Semax Peptide: What the Evidence Shows for Cognitive Function and Neuroprotection (2026 Guide)
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
22 min
Dihexa Peptide: What the Evidence Shows for Cognitive Enhancement and Neuroprotection (2026 Guide)
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.
The newsletter
Get the latest peptide & TRT research
Weekly evidence-based updates on protocols, costs, and telehealth provider quality.
Free forever. Unsubscribe anytime. We never sell your email.