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The PeRx Journal

Science-backed peptide insights.

Deep dives, research breakdowns, and the clinical thinking behind every protocol — written by the PeRx team.

Coming Off Ozempic: A 2026 Peptide Transition Guide
ResearchFeatured

Coming Off Ozempic: A 2026 Peptide Transition Guide

What happens when you stop a GLP-1, why most patients regain 60-70% of the weight within a year, and the peptide playbook providers use to hold the line on body composition without staying on Ozempic forever.

PxPeRx·May 9, 2026·14 min read
Research Peptides vs Prescription Peptides (2026)
Research

Research Peptides vs Prescription Peptides (2026)

An honest comparison for the patient who already uses peptides — what the 'Not for Human Use' label actually means, the real quality differences, and the practical steps to switch from research-chemical sourcing to a prescription supply.

PxPeRx·May 9, 2026·13 min read
Best Peptides in LA: 2026 Aesthetic & Recovery Guide
Peptide Guide

Best Peptides in LA: 2026 Aesthetic & Recovery Guide

From Beverly Hills to Manhattan Beach to Studio City — what peptide therapy actually costs in Los Angeles, and how to get pharmaceutical-grade peptides shipped to any LA zip code without a clinic visit.

PxPeRx·May 8, 2026·11 min read
Austin Peptide Therapy: 2026 Biohacker's Guide
Peptide Guide

Austin Peptide Therapy: 2026 Biohacker's Guide

For the Lady Bird Lake runners, ATX founders, Hill Country cyclists, and post-COVID tech relocators — what peptide therapy actually costs in Austin, and how to get pharmaceutical-grade peptides shipped without a clinic visit.

PxPeRx·May 8, 2026·11 min read
Peptide Therapy Denver: 2026 Mountain West Guide
Peptide Guide

Peptide Therapy Denver: 2026 Mountain West Guide

For Front Range trail runners, Vail and Aspen weekend skiers, Boulder biotech, and Wash Park cyclists — what peptide therapy actually costs in Denver, and how to get pharmaceutical-grade peptides shipped without a clinic visit.

PxPeRx·May 8, 2026·11 min read
Peptide Therapy Seattle: Pacific Northwest Guide
Peptide Guide

Peptide Therapy Seattle: Pacific Northwest Guide

Whether you train Cougar Mountain trails, ski Crystal, or commute the 520 — what peptide therapy actually costs in Seattle and the Puget Sound, and how to get pharmaceutical-grade peptides shipped without a clinic visit.

PxPeRx·May 7, 2026·10 min read
Best Peptides in Miami: 2026 South Florida Guide
Peptide Guide

Best Peptides in Miami: 2026 South Florida Guide

From Brickell finance to Coconut Grove longevity to South Beach fitness — what peptide therapy actually costs in Miami, and how to get pharmaceutical-grade peptides shipped to any Miami zip code without a clinic visit.

PxPeRx·May 7, 2026·10 min read
Peptide Therapy in NYC: A Five-Borough Guide
Peptide Guide

Peptide Therapy in NYC: A Five-Borough Guide

From Tribeca to Williamsburg to Astoria — what peptide therapy actually costs across all five boroughs, and how to get pharmaceutical-grade peptides shipped to any NYC zip code without a clinic visit.

PxPeRx·May 7, 2026·11 min read
Peptide Therapy Palo Alto: 2026 Silicon Valley Guide
Peptide Guide

Peptide Therapy Palo Alto: 2026 Silicon Valley Guide

What peptide therapy actually costs on the Peninsula — Palo Alto, Menlo Park, Atherton, Woodside, and the South Bay — and how to get pharmaceutical-grade peptides shipped without a clinic visit or new labs.

PxPeRx·May 5, 2026·11 min read
Where to Get Peptides in San Diego (2026 Guide)
Peptide Guide

Where to Get Peptides in San Diego (2026 Guide)

A practical buying guide for San Diego County peptide therapy — what it costs in La Jolla, Del Mar, Coronado, Carlsbad, and beyond, and how to get pharmaceutical-grade peptides shipped overnight to any SD zip code without a clinic visit.

PxPeRx·May 5, 2026·11 min read
Best Peptide Therapy in San Francisco (2026)
Peptide Guide

Best Peptide Therapy in San Francisco (2026)

From SoMa to the Marina to Marin and the Peninsula — what peptide therapy actually costs in the Bay Area, and how to get pharmaceutical-grade peptides shipped to any San Francisco zip code without a clinic visit.

PxPeRx·May 5, 2026·10 min read
Is PT-141 Legal in 2026? Bremelanotide Compounding, Telehealth, and Gray Market
FDA & Regulation

Is PT-141 Legal in 2026? Bremelanotide Compounding, Telehealth, and Gray Market

PT-141 has stronger legal footing than most peptides because the molecule is FDA-approved as Vyleesi. Full breakdown of the 503A pathway, the 2024-2026 reclassification story, and what to avoid.

PxPeRx·Apr 26, 2026·11 min read
Where to Inject MOTS-c: Site Map, Rotation, and Timing
How-To

Where to Inject MOTS-c: Site Map, Rotation, and Timing

The four standard subQ sites, how to rotate, when to inject around exercise, and the small technique details that change comfort and consistency.

PxPeRx·Apr 26, 2026·8 min read
Best Peptides for Energy in 2026: A Mechanism-by-Mechanism Guide
Research

Best Peptides for Energy in 2026: A Mechanism-by-Mechanism Guide

MOTS-c, NAD+, CJC-1295/Ipamorelin, Tesamorelin, and Glutathione each target a different layer of the energy system. Here is how to choose.

PxPeRx·Apr 26, 2026·13 min read
Anti-Aging Peptides: The Best Options in 2026, Mapped by Mechanism
Research

Anti-Aging Peptides: The Best Options in 2026, Mapped by Mechanism

Aging is not one process. The peptides with real evidence each target a specific mechanism: telomeres, skin, mitochondria, immunity, metabolism, regeneration. A mechanism-by-mechanism map of Epitalon, GHK-Cu, NAD+, MOTS-c, Thymosin Alpha-1, and BPC-157, with a comparison table, onset times, and FDA status.

PxPeRx·Apr 26, 2026·16 min read
Thymus Peptides Explained: Thymosin Alpha-1, Thymosin Beta-4, and TB-500
Research

Thymus Peptides Explained: Thymosin Alpha-1, Thymosin Beta-4, and TB-500

Three thymus-derived peptides, two different families. Alpha trains the immune system. Beta-4 and TB-500 drive tissue repair. Here is how to choose between them.

PxPeRx·Apr 26, 2026·12 min read
Peptides vs HGH: Safety, Cost, and Results Compared
Comparison

Peptides vs HGH: Safety, Cost, and Results Compared

Direct HGH versus growth hormone peptides (Sermorelin, CJC-1295/Ipamorelin, Tesamorelin). Why most adult patients have moved to the peptide approach. Honest comparison.

PxPeRx·Apr 26, 2026·14 min read
Peptide Cycling: How Long to Run Each Peptide and When to Take a Break
Research

Peptide Cycling: How Long to Run Each Peptide and When to Take a Break

Some peptides need scheduled breaks to keep working. Others can run continuously. Concrete cycling schedules for GH secretagogues, repair peptides, anti-aging peptides, and more, plus a peptide-by-peptide cycling chart.

PxPeRx·Apr 26, 2026·14 min read
Are Peptides Safe Long-Term? What the Data Actually Says
Research

Are Peptides Safe Long-Term? What the Data Actually Says

Three safety buckets: peptides with decades of data, peptides with several years of record, and peptides where the long-term picture is genuinely incomplete. Plus the monitoring labs that matter.

PxPeRx·Apr 26, 2026·14 min read
Injection Site Irritation on Ozempic, Wegovy, and Mounjaro: What Helps
Research

Injection Site Irritation on Ozempic, Wegovy, and Mounjaro: What Helps

Painful lumps, bruising, redness, and lingering soreness at GLP-1 injection sites. Why they happen, how to prevent them with technique, and which peptides providers prescribe for patients with persistent nodules.

PxPeRx·Apr 23, 2026·10 min read
Hair Loss on Ozempic, Wegovy, and Mounjaro: Why It Happens and What Helps
Research

Hair Loss on Ozempic, Wegovy, and Mounjaro: Why It Happens and What Helps

The FDA added hair loss to the Wegovy label in 2023. Here is why rapid weight loss triggers telogen effluvium, the nutritional fixes that actually matter, and the peptides that support hair recovery.

PxPeRx·Apr 23, 2026·11 min read
Nausea, Constipation, and Gut Issues on GLP-1s: What Actually Helps
Research

Nausea, Constipation, and Gut Issues on GLP-1s: What Actually Helps

GI side effects are the single biggest reason patients stop Ozempic, Wegovy, and Mounjaro. Why they happen, which simple changes resolve most cases, and when BPC-157 is the right add-on.

PxPeRx·Apr 23, 2026·11 min read
How to Keep Muscle While Taking Ozempic, Wegovy, or Mounjaro
Research

How to Keep Muscle While Taking Ozempic, Wegovy, or Mounjaro

Up to 40% of weight lost on GLP-1 medications is lean muscle. Here is what the research actually shows, why it happens, and which growth hormone peptides providers prescribe to preserve lean mass during a caloric deficit.

PxPeRx·Apr 22, 2026·12 min read
Ozempic Face, Loose Skin, and What Actually Helps
Research

Ozempic Face, Loose Skin, and What Actually Helps

Rapid weight loss on GLP-1s can change how your face and skin look. What is actually happening underneath, why skin recovery lags fat loss, and which peptides support the repair process.

PxPeRx·Apr 22, 2026·11 min read
FDA to Reconsider Peptide Restrictions: What the July 2026 Review Means for Patients
Latest News

FDA to Reconsider Peptide Restrictions: What the July 2026 Review Means for Patients

The FDA will convene its advisory panel to review BPC-157, TB-500, Semax, and four other peptides for reclassification. What the meeting means for peptide therapy access.

PxPeRx·Apr 15, 2026·10 min read
What Is Peptide Therapy? A Straightforward Explanation
Research

What Is Peptide Therapy? A Straightforward Explanation

A plain-language explanation of what peptides are, how they work in the body, which ones are actually backed by research, and how to tell a legitimate provider from a gray-market vendor.

PxPeRx·Apr 9, 2026·16 min read
How Much Does Peptide Therapy Cost in 2026?
Research

How Much Does Peptide Therapy Cost in 2026?

A transparent breakdown of what peptide therapy actually costs, what you are paying for at each price tier, and how to avoid overpaying for under-dosed product.

PxPeRx·Apr 9, 2026·12 min read
Is Peptide Therapy Safe? What the Research Actually Shows
Research

Is Peptide Therapy Safe? What the Research Actually Shows

What the published research says about the safety profile of therapeutic peptides, what the real risks are, and how sourcing affects everything.

PxPeRx·Apr 9, 2026·14 min read
Peptide Therapy Results: What to Expect and When
Research

Peptide Therapy Results: What to Expect and When

Realistic week-by-week timelines for BPC-157, growth hormone peptides, metabolic peptides, and more. Based on published data, not marketing claims.

PxPeRx·Apr 9, 2026·13 min read
Are Peptides Legal in 2026? The Current Regulatory Status
FDA & Regulation

Are Peptides Legal in 2026? The Current Regulatory Status

FDA reclassifications, compounding pharmacy rules, and what has changed since 2024. Where things stand as of April 2026.

PxPeRx·Apr 9, 2026·12 min read
Ipamorelin vs Sermorelin: Which Growth Hormone Peptide Should You Use?
Comparison

Ipamorelin vs Sermorelin: Which Growth Hormone Peptide Should You Use?

Both stimulate your pituitary to release growth hormone. But they work through different receptors and suit different patients.

PxPeRx·Apr 9, 2026·11 min read
Oral Peptides vs Injectable: Which Delivery Method Is Right for You?
Comparison

Oral Peptides vs Injectable: Which Delivery Method Is Right for You?

Injectable peptides have higher bioavailability. Oral peptides are easier to take. The right choice depends on what you are treating.

PxPeRx·Apr 9, 2026·10 min read
GHK-Cu vs. NAD+: Which Anti-Aging Peptide Is Right for You?
Comparison

GHK-Cu vs. NAD+: Which Anti-Aging Peptide Is Right for You?

GHK-Cu rebuilds the structure, skin, collagen, connective tissue, hair. NAD+ refuels the metabolism, energy, DNA repair, sirtuins. Which to choose, and when to run both.

PxPeRx·Apr 9, 2026·11 min read
Epitalon vs NAD+: Telomere Protection vs Cellular Energy
Comparison

Epitalon vs NAD+: Telomere Protection vs Cellular Energy

Epitalon activates telomerase to protect your chromosomes. NAD+ fuels DNA repair and energy production. A comparison of two longevity approaches.

PxPeRx·Apr 9, 2026·10 min read
Peptide Stacking: How to Combine Peptides Safely and Effectively
Research

Peptide Stacking: How to Combine Peptides Safely and Effectively

Which combinations work, which are redundant, and how to build a multi-peptide protocol for healing, body composition, longevity, or sleep.

PxPeRx·Apr 9, 2026·13 min read
Peptide Therapy for Athletes: Recovery, Performance, and WADA Rules
Research

Peptide Therapy for Athletes: Recovery, Performance, and WADA Rules

Which peptides help athletes recover faster, heal injuries, and optimize body composition. Plus what competitive athletes need to know about anti-doping.

PxPeRx·Apr 9, 2026·12 min read
Best Peptides for Women Over 40: What Actually Works
Research

Best Peptides for Women Over 40: What Actually Works

Which peptides target the specific biological changes women face after 40: GH decline, body composition, skin quality, sleep, and recovery.

PxPeRx·Apr 9, 2026·12 min read
Best Peptides for Men Over 40: Reclaiming What Time Takes
Research

Best Peptides for Men Over 40: Reclaiming What Time Takes

Growth hormone decline, stubborn belly fat, slower recovery, lighter sleep, and lingering injuries. Which peptides address each one.

PxPeRx·Apr 9, 2026·12 min read
Is CJC-1295/Ipamorelin FDA Approved? What You Need to Know
FDA & Regulation

Is CJC-1295/Ipamorelin FDA Approved? What You Need to Know

CJC-1295 and Ipamorelin are not FDA-approved drugs. They are compounded medications. Here is what that means, how compounding works, and which growth hormone peptide actually has FDA approval.

PxPeRx·Apr 7, 2026·10 min read
Best Peptides for Sleep in 2026: A Research-Backed Guide
Research

Best Peptides for Sleep in 2026: A Research-Backed Guide

DSIP, Selank, Pinealon, CJC-1295/Ipamorelin, and Epitalon each target a different layer of your sleep biology. Comparison table, evidence ratings, and which one matches your sleep problem.

PxPeRx·Apr 7, 2026·14 min read
BPC-157 vs TB-500: What Is the Difference?
Comparison

BPC-157 vs TB-500: What Is the Difference?

Both are recovery peptides. Both are popular. But they work through completely different mechanisms. BPC-157 sends the repair signals. TB-500 moves the construction crew.

PxPeRx·Apr 7, 2026·13 min read
Is BPC-157 FDA Approved? What You Need to Know
FDA & Regulation

Is BPC-157 FDA Approved? What You Need to Know

BPC-157 has never entered clinical trials or been submitted for FDA approval. It has over 100 preclinical studies spanning 30 years.

PxPeRx·Apr 7, 2026·10 min read
Is Sermorelin FDA Approved? The Full Regulatory Story
FDA & Regulation

Is Sermorelin FDA Approved? The Full Regulatory Story

Sermorelin was FDA-approved in 1997 as Geref, used clinically for over a decade, then voluntarily discontinued in 2008.

PxPeRx·Apr 7, 2026·10 min read
Is PT-141 FDA Approved? The Bremelanotide Story
FDA & Regulation

Is PT-141 FDA Approved? The Bremelanotide Story

The molecule in PT-141, bremelanotide, is FDA-approved as Vyleesi for female HSDD. Compounded PT-141 is the same molecule prescribed off-label for men and women.

PxPeRx·Apr 7, 2026·12 min read
Is TB-500 FDA Approved? What You Need to Know
FDA & Regulation

Is TB-500 FDA Approved? What You Need to Know

TB-500 is not FDA-approved, but its parent molecule Thymosin Beta-4 has been in Phase 2 human clinical trials.

PxPeRx·Apr 7, 2026·10 min read
Is AOD 9604 FDA Approved? The Full Regulatory History
FDA & Regulation

Is AOD 9604 FDA Approved? The Full Regulatory History

AOD 9604 completed Phase 2 clinical trials in Australia with 300+ patients. Development paused for efficacy, not safety.

PxPeRx·Apr 7, 2026·10 min read
Is DSIP FDA Approved? The Science Behind the Mystery Peptide
FDA & Regulation

Is DSIP FDA Approved? The Science Behind the Mystery Peptide

DSIP has 500+ studies, no gene ever found, no receptor identified, and no FDA approval. The barriers are commercial, not safety. Here is what that means for patients.

PxPeRx·Apr 7, 2026·11 min read
Is Epitalon FDA Approved? The Telomerase Peptide's Regulatory Status
FDA & Regulation

Is Epitalon FDA Approved? The Telomerase Peptide's Regulatory Status

Epitalon's evidence comes from 40 years of Russian research by Vladimir Khavinson. No Western clinical trials exist.

PxPeRx·Apr 7, 2026·10 min read
Is GHK-Cu FDA Approved? The Gene Expression Peptide's Regulatory Status
FDA & Regulation

Is GHK-Cu FDA Approved? The Gene Expression Peptide's Regulatory Status

GHK-Cu modulates over 4,000 human genes and has been in topical skincare for 40 years. Injectable GHK-Cu has never entered clinical trials.

PxPeRx·Apr 7, 2026·10 min read
Is NAD+ FDA Approved? The Supplement vs Injection Distinction
FDA & Regulation

Is NAD+ FDA Approved? The Supplement vs Injection Distinction

Oral NAD+ precursors are OTC supplements. Injectable NAD+ is a compounded medication. Same molecule, different regulatory paths.

PxPeRx·Apr 7, 2026·10 min read
Is MOTS-C FDA Approved? The Newest Peptide in Metabolic Science
FDA & Regulation

Is MOTS-C FDA Approved? The Newest Peptide in Metabolic Science

MOTS-C was discovered in 2015 at USC, the first peptide encoded by mitochondrial DNA. It is not FDA-approved; here is what its regulatory status actually means.

PxPeRx·Apr 7, 2026·11 min read
Is Glutathione FDA Approved? The Master Antioxidant's Regulatory Status
FDA & Regulation

Is Glutathione FDA Approved? The Master Antioxidant's Regulatory Status

Injectable glutathione is compounded. Oral is OTC. NAC (precursor) is FDA-approved for acetaminophen overdose.

PxPeRx·Apr 7, 2026·9 min read
Is Thymosin Alpha-1 FDA Approved? The Immune Peptide Approved in 35 Countries
FDA & Regulation

Is Thymosin Alpha-1 FDA Approved? The Immune Peptide Approved in 35 Countries

Not in the US. But approved in 35+ countries as Zadaxin, with FDA Orphan Drug designation and 4,400+ published studies.

PxPeRx·Apr 7, 2026·10 min read
CJC-1295 vs Sermorelin: Which Growth Hormone Peptide Is Right for You?
Comparison

CJC-1295 vs Sermorelin: Which Growth Hormone Peptide Is Right for You?

Both stimulate natural GH production through the GHRH receptor. CJC-1295 lasts days. Sermorelin clears in minutes.

PxPeRx·Apr 7, 2026·12 min read
PT-141 vs Viagra: How They Work Differently
Comparison

PT-141 vs Viagra: How They Work Differently

PT-141 targets desire in the brain (melanocortin receptors). Viagra targets blood flow (PDE5). Different mechanisms for different problems.

PxPeRx·Apr 7, 2026·11 min read
DSIP vs Melatonin: Different Sleep Problems, Different Solutions
Comparison

DSIP vs Melatonin: Different Sleep Problems, Different Solutions

Melatonin regulates when you fall asleep. DSIP regulates how deep you sleep.

PxPeRx·Apr 7, 2026·12 min read
BPC-157 vs GHK-Cu: Acute Repair vs Tissue Remodeling
Comparison

BPC-157 vs GHK-Cu: Acute Repair vs Tissue Remodeling

BPC-157 sends growth factor signals to fix an injury now. GHK-Cu rewrites gene expression to reverse tissue aging.

PxPeRx·Apr 7, 2026·11 min read
Tesamorelin vs CJC-1295/Ipamorelin: FDA-Approved vs Dual-Pathway
Comparison

Tesamorelin vs CJC-1295/Ipamorelin: FDA-Approved vs Dual-Pathway

Tesamorelin is the only FDA-approved GH peptide. CJC-1295/Ipamorelin is the most popular compounded GH stack.

PxPeRx·Apr 7, 2026·11 min read
Tesamorelin: The Only FDA-Approved GHRH Analog for Visceral Fat Reduction
Peptide Guide

Tesamorelin: The Only FDA-Approved GHRH Analog for Visceral Fat Reduction

Most peptides have animal studies and early clinical signals. Tesamorelin has two Phase 3 randomized controlled trials, 816 patients, CT-measured visceral fat data, and an FDA approval.

PxPeRx·Mar 3, 2026·17 min read
AOD-9604: The Fat-Burning Fragment That Came From Growth Hormone
Peptide Guide

AOD-9604: The Fat-Burning Fragment That Came From Growth Hormone

Growth hormone burns fat. It also raises blood sugar, swells joints, and can trigger abnormal growth. In 1993, an Australian biochemist isolated the 16 amino acids responsible for fat metabolism and nothing else. That fragment became AOD-9604.

PxPeRx·Mar 3, 2026·16 min read
Glutathione: The Complete Guide to the Body's Master Antioxidant
Peptide Guide

Glutathione: The Complete Guide to the Body's Master Antioxidant

Every cell in your body makes it. Every detoxification reaction in your liver depends on it. And you're losing it every year. Here's why oral supplements don't work and what actually does.

PxPeRx·Mar 3, 2026·18 min read
BPC/TB-500: The Complete Guide to the Tissue Repair Combination
Peptide Guide

BPC/TB-500: The Complete Guide to the Tissue Repair Combination

One peptide sends the repair signals. The other moves the repair crew into position. How BPC-157 and TB-500 cover every phase of healing through non-overlapping pathways, in a single pre-mixed vial.

PxPeRx·Mar 3, 2026·16 min read
GHK-Cu/Epitalon: The Complete Guide to the Regeneration + Longevity Combination
Peptide Guide

GHK-Cu/Epitalon: The Complete Guide to the Regeneration + Longevity Combination

One peptide rebuilds tissue quality at the surface. The other protects the cellular machinery that makes rebuilding possible. Two levels of anti-aging in a single pre-mixed vial.

PxPeRx·Mar 3, 2026·15 min read
Tesamorelin/Ipamorelin: The Complete Guide to the Precision GH Combination
Peptide Guide

Tesamorelin/Ipamorelin: The Complete Guide to the Precision GH Combination

The only FDA-approved GHRH analog paired with the cleanest growth hormone secretagogue. Two independent receptor systems on the same pituitary cell, converging on larger, more physiological GH pulses.

PxPeRx·Mar 3, 2026·17 min read
AOD 9604/MOTS-c: The Complete Guide to the Metabolic Recomposition Combination
Peptide Guide

AOD 9604/MOTS-c: The Complete Guide to the Metabolic Recomposition Combination

One peptide breaks down stored fat through beta-3 adrenergic lipolysis. The other reprograms cellular fuel efficiency through AMPK activation. Two angles on the same metabolic problem, in a single pre-mixed vial.

PxPeRx·Mar 3, 2026·17 min read
Pinealon/PE-22-28/Selank: The Complete Guide to the Neuroprotective Blend
Peptide Guide

Pinealon/PE-22-28/Selank: The Complete Guide to the Neuroprotective Blend

Three peptides, three layers of brain support. Pinealon restores sleep architecture. PE-22-28 drives neurogenesis through TREK-1 blockade. Selank calms anxiety through GABA modulation without sedation. One pre-mixed vial for comprehensive neuroprotection.

PxPeRx·Mar 3, 2026·18 min read
How to Inject Peptides: A Step-by-Step Subcutaneous Injection Guide
How-To

How to Inject Peptides: A Step-by-Step Subcutaneous Injection Guide

A clear, visual walkthrough of subcutaneous peptide injections — from supply setup to sharps disposal. Designed for patients new to self-injection.

PxPeRx·Feb 20, 2026·8 min read
PT-141 (Bremelanotide): The Complete Guide to the Desire Peptide
Peptide Guide

PT-141 (Bremelanotide): The Complete Guide to the Desire Peptide

How PT-141 works in the brain, its FDA approval, the clinical results, the honest nausea data, dosage protocols, and how it compares to Viagra and Cialis.

PxPeRx·Apr 30, 2025·18 min read
Thymosin Alpha-1: The Complete Guide to Immune System Training
Peptide Guide

Thymosin Alpha-1: The Complete Guide to Immune System Training

Everything you need to know about TA-1 — how it trains your immune system, clinical evidence across 35+ countries, and how it compares to supplements and immunotherapy.

PxPeRx·Apr 25, 2025·11 min read
Selank/Semax: The Complete Guide to the Anti-Anxiety Nootropic Blend
Peptide Guide

Selank/Semax: The Complete Guide to the Anti-Anxiety Nootropic Blend

Two Soviet-developed peptides in one blend: Selank calms anxiety through GABA modulation while Semax sharpens cognition through BDNF. No sedation, no dependence, no cognitive fog.

PxPeRx·Apr 20, 2025·18 min read
NAD+ Injection: The Complete Guide to the Longevity Molecule
Peptide Guide

NAD+ Injection: The Complete Guide to the Longevity Molecule

Hollywood's most talked-about anti-aging treatment used to require a $1,000 IV drip and four hours in a clinic. The same molecule, discovered in 1906, now comes as a simple at-home injection.

PxPeRx·Apr 10, 2025·19 min read
MOTS-c: The Complete Guide to the Mitochondrial Exercise Peptide
Peptide Guide

MOTS-c: The Complete Guide to the Mitochondrial Exercise Peptide

Your mitochondria aren't just making energy. They're sending messages. MOTS-c is one of their most important signals: a 16-amino-acid peptide your body produces during exercise that regulates metabolism, insulin sensitivity, and physical performance.

PxPeRx·Apr 5, 2025·19 min read
GHK-Cu (Copper Peptide): The Complete Guide to Skin, Hair, and Tissue Repair
Peptide Guide

GHK-Cu (Copper Peptide): The Complete Guide to Skin, Hair, and Tissue Repair

How GHK-Cu rebuilds collagen, influences thousands of genes, and helps skin and hair, plus the research, dosage, side effects, and how the injectable differs from topical copper-peptide skincare.

PxPeRx·Mar 25, 2025·20 min read
Epitalon: The Peptide That Made Cells Outlive Their Death Clock
Peptide Guide

Epitalon: The Peptide That Made Cells Outlive Their Death Clock

Every cell in your body has a countdown timer. A Russian military gerontologist extracted a peptide from the pineal gland that reactivated telomerase and made human cells surpass their programmed death clock. In 2025, an independent lab finally confirmed the mechanism.

PxPeRx·Mar 20, 2025·11 min read
CJC-1295/Ipamorelin: The Complete Guide to the Growth Hormone Peptide Stack
Peptide Guide

CJC-1295/Ipamorelin: The Complete Guide to the Growth Hormone Peptide Stack

After age 30, your body produces roughly 15% less growth hormone every decade. This peptide stack tells your body to start making more of its own again. One peptide provides the sustained signal. The other amplifies each pulse.

PxPeRx·Mar 10, 2025·14 min read
DSIP: The Complete Guide to Neuroscience's Most Mysterious Sleep Molecule
Peptide Guide

DSIP: The Complete Guide to Neuroscience's Most Mysterious Sleep Molecule

How DSIP restores deep, restorative sleep without sedation: the science, the gene mystery, the safety record, dosage, and how it compares to melatonin and Ambien.

PxPeRx·Mar 1, 2025·18 min read
BPC-157: The Complete Guide to the Body Protection Compound
Peptide Guide

BPC-157: The Complete Guide to the Body Protection Compound

A peptide discovered in a Croatian lab in the early '90s is now one of the most studied healing compounds in regenerative medicine. Here's what the science actually says, where it came from, and what you should know before starting.

PxPeRx·Feb 1, 2025·18 min read
Sermorelin: The Complete Guide to the Original Growth Hormone Peptide
Peptide Guide

Sermorelin: The Complete Guide to the Original Growth Hormone Peptide

Every growth hormone peptide used today traces its lineage back to this molecule. Sermorelin was once FDA-approved, then abandoned for commercial reasons. Now it's having a second act as the safest entry point into growth hormone optimization.

PxPeRx·Jan 15, 2025·12 min read