◤ Top story · Peter Attia
PETER ATTIA: GROWTH HORMONE FALLS SHORT FOR ADULT MUSCULOSKELETAL REPAIR...
*Despite a plausible mechanism, GH has not delivered on adult tissue repair promises.*
Last updated May 26, 2026 — I read this morning's peptide research and picked the items that mattered. Fresh brief tomorrow.
Featured Briefs
◤ From the network · Research Vials
WHAT IS GHK-CU? COPPER PEPTIDE RESEARCH IN WOUND HEALING AND BEYOND
Research VialsA research review of GHK-Cu — the copper-binding tripeptide studied for collagen synthesis, wound healing, gene expression modulation, and anti-inflammatory signaling.
◤ Human study · PubMed
GZR18, A GLP-1 ANALOG WITH ONCE-WEEKLY OR BI-WEEKLY DOSING FOR BODY WEIGHT MANAGEMENT: A RANDOMIZED, PLACEBO-CONTROLLED, PHASE 1B/2A TRIAL.
PubMed · Cell reports. MedicineJi L et al., Cell reports. Medicine · 2026 Apr 21. PMID 41956096.
◤ Article
SPERMIDINE CUTS IMMUNE CELL SENESCENCE, LIFTS VACCINE RESPONSE IN OLDER ADULTS...
Aging CellA pilot study found spermidine reduced markers of immune cell senescence (aged, poorly functioning immune cells) in healthy older adults. Vaccine responses improved alongside. The finding adds human-data weight to a compound that was mostly animal-model territory until now.
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SUPPLEMENTS AND BIOLOGICAL AGE: AGING CELL COHORT FINDS MEASURABLE LINKS...
Aging CellResearchers tracked supplements and drugs against biological age scores in a cohort of unusually healthy individuals. Several compounds showed statistically significant associations with younger biological age. The study does not prove causation, but the effect sizes are worth noting.
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MITOCHONDRIAL AGING TIED TO LOSS OF KEY MEMBRANE LIPID...
Lifespan.ioScientists found that phosphatidylcholine — the most abundant lipid in mitochondrial membranes — falls with age. That decline appears to drive mitochondrial dysfunction. The finding opens a potential target for mitochondria-focused peptide and lipid research.
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CELLULAR SENESCENCE MAPPED AT ITS ROOTS: PRIMARY VS. SECONDARY DIFFER MORE THAN THOUGHT...
Lifespan.ioResearchers in Aging Cell compared radiation-induced senescence to senescence spread by the SASP (a cocktail of inflammatory signals that cause nearby cells to age). The two types look different at the molecular level. That distinction matters for any senolytic or anti-aging peptide targeting these pathways.
▶ Video
BUILD MUSCLE, GREAT POSTURE & RESILIENCE TO INJURY | JEFF CAVALIERE
Andrew HubermanJeff Cavaliere, MSPT, CSCS, is a physical therapist and certified strength and conditioning specialist and one of the world's leading public educators on resistance training to build muscle size and strength, avoiding and overcoming injurie
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THE #1 TIME TO TAKE PSYLLIUM HUSK FOR MAXIMUM FAT LOSS!
Dr LivingoodMost people taking psyllium husk every day are still not losing weight — and the timing is usually why. The difference between the right window and the wrong one can cut the fat loss benefits by as much as 60%. In this video, I break down t
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SLU-PP-332 WEIGHT LOSS
Regan ArchibaldStruggling to lose weight even with dieting, workouts, or popular weight loss medications? Wondering if compounds like SLU-PP-332 can really help your body burn fat without changing your lifestyle? In this video, I break down the science be
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EVERYONE IS ENHANCED. WE JUST WON'T ADMIT IT.
Dr Alex TatemWhat does it actually mean to be “enhanced”? As Day 2 of the Enhanced Games approaches, Dr. Alex Tatem takes a step back from world records, performance-enhancing drugs, and athletic competition to explore a bigger question: why do we acce
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17 GLP-1 TIPS I WISH I KNEW BEFORE STARTING MY JOURNEY
Dr Jones DCBook your free discovery call *HERE:* https://drjonesdc.com/yt1d I wish I had known these 17 GLP-1 lessons before my first shot. From baseline labs and protein targets to injection timing, electrolyte headaches, sulfur burps, magnesium, a
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TAKE THE DEATH TEST: 5 EARLY SIGNS OF THE TOP 5 KILLERS (PART 1)
Doctor Michael MuellerWelcome to the ultimate resource for Longevity, Hormone Optimization, and Biohacking, led by a Mayo Clinic Trained Family Physician. I'm here to cut through the noise and provide evidence-based strategies for extending your healthspan and d
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PCOS REVERSED: THE METABOLIC TRUTH NOBODY'S TALKING ABOUT - DR TREVOR BACHMEYER
Dr Trevor BachmeyerPCOS Isn’t an Ovary Problem Insulin Resistance, Hyperandrogenism, Labs, Deficiencies, and What Actually Reverses It On Memorial Weekend, I go off the cuff to explain why “PCOS” is a mislabel, it’s a metabolic problem driven by insulin res
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DORIAN YATES REVEALS HIS EXACT DIET TO DROP FAT AND BUILD MUSCLE
Thomas DeLauerUse Code THOMAS20 for 20% off Your First Order of SEED: http://seed.com/thomasyt Follow Dorian on Instagram: https://www.instagram.com/thedorianyates/ Dorian's Nutrition Company, DY Nutrition: https://dynutrition.com/en-us This video does
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SLU-PP-332 SIDE EFFECTS
Regan ArchibaldStruggling to know whether new weight loss compounds like SLU-PP-332 are actually safe? In this video, I break down the potential risks, what the current research really shows, and why medical oversight, baseline testing, and proper diagnos
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THIRD-PARTY TESTED PEPTIDES: WHY IT MATTERS & HOW TO VERIFY
Research VialsWhy third-party testing is the gold standard for research peptides. HPLC methods, mass spec verification, COA interpretation, and how to confirm test authenticity.
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WHAT HIGH DOSE VITAMIN D DOES TO YOUR BRAIN IS SHOCKING
Dr Nick ZyrowskiQuality Vitamin D3K2 10,000: https://bit.ly/4crSqrI What High Dose Vitamin D Does To Your Brain Is SHOCKING. A powerful new study reveals that your vitamin D levels today may directly impact your brain health decades from now. In this vide
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THE DIET THAT DANIEL MACPHERSON FOLLOWED TO GET SHREDDED FOR BEAST (WITH RUSSEL CROWE)
Thomas DeLauerGet LMNT Electrolytes & Receive a FREE Sample Flavors Pack: http://drinklmnt.com/thomas Follow Dan on Instagram: https://www.instagram.com/danmacpherson/ This video does contain a paid partnership with a brand that helps to support this c
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CAN'T STOP PEEING? WHY GETTING UP TO PEE AT NIGHT COULD MEAN MORE THAN BPH
Rena Malik MDIn this video, Dr. Rena Malik explains the real reasons men wake up multiple times a night to pee—and why it’s not always just your prostate. She breaks down the 4 most common causes of nighttime urination, including BPH, overactive bladder
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OMEGA-3 RECEPTOR DEFICIENCY ACCELERATES KIDNEY AGING IN NEW MOUSE DATA...
Lifespan.ioResearchers found that knocking out the omega-3 fatty acid receptor FFAR4 worsened renal aging and chronic kidney disease in mice. Cellular senescence appears to be the bridge between low omega-3 signaling and kidney decline.
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PEPTIDES AND CANCER PART 1: HOW TUMORS HIJACK THE PATHWAYS PEPTIDE RESEARCHERS STUDY...
Research VialsPart one of a three-part deep dive covers the cell biology of tumor formation and the signaling pathways cancer co-opts. It is a useful foundation for researchers asking how growth-promoting peptides interact with oncogenic risk.
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PEPTIDES AND CANCER PART 3: GH SECRETAGOGUES, WASHOUT WINDOWS, AND THE RISK CALCULUS...
Research VialsPart three tackles the question researchers actually want answered: what does the evidence say about GH secretagogues (compounds like CJC-1295 and Ipamorelin that raise GH) and cancer risk? The piece covers washout strategies and acknowledges where the data is thin.
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VIRTA HEALTH: 100,000 PATIENTS, METABOLIC REVERSAL, AND WHAT GLP-1 DATA MISSES...
Tim FerrissVirta Health CEO Sami Inkinen joins Tim Ferriss to discuss reversing type 2 diabetes at scale. The conversation covers metabolic health levers that GLP-1 drug trials rarely examine — relevant context for researchers comparing AOD-9604 and Semaglutide approaches.
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SIRTUIN 6 OVEREXPRESSION REVERSES AGE-RELATED DNA CHROMATIN CHANGES IN LIVER CELLS...
Fight Aging!Boosting Sirtuin 6 expression reversed structural changes in liver cell DNA that accumulate with age. The chromatin (the way DNA is packaged inside the cell nucleus) returned toward a younger pattern. This is one of the cleaner epigenetic reversal results in recent weeks.
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BEST PEPTIDES FOR MUSCULOSKELETAL RESEARCH IN 2026
Research VialsA ranked review of peptides studied for tendon, ligament, muscle, and bone repair — BPC-157, TB-500, GHK-Cu, and growth hormone secretagogues.
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CRISPR TOOL KILLS CELLS ON DEMAND BY TARGETING RNA — SENOLYTIC IMPLICATIONS...
Lifespan.ioScientists built a CRISPR-based system that kills only cells carrying a target RNA sequence. Early tests hit cancer cells and virus-infected cells. The platform could eventually pair with peptide-based delivery for precision senolytic applications.
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CHINA LAUNCHES NATIONAL PHYSICIAN TRAINING PROGRAM IN LONGEVITY MEDICINE...
Lifespan.ioChina has rolled out its first national competency-based training program for longevity medicine physicians. The move reflects the scale of its aging population challenge. It also signals that longevity is moving from fringe research into mainstream clinical education.
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BRYAN JOHNSON: HOW TO KEEP SKIN YOUNG — THE EVIDENCE REVIEW...
BluePrint (Bryan Johnson)Bryan Johnson's team reviewed the evidence on skin aging and built a protocol around actives with real data behind them. The post is candid that most skin creams overpromise. Relevant for researchers following GHK-Cu and copper peptide skin repair literature.
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AGED GUT MICROBIOME EXPORTS EXTRACELLULAR VESICLES THAT DAMAGE TISSUE FUNCTION...
Fight Aging!New research shows the aging gut microbiome produces extracellular vesicles (tiny particles cells use to communicate) that impair tissue function across the body. Harmful microbial populations expand with age and drive this effect. BPC-157's known gut-microbiome interactions make this directly relevant.
- HALLMARKS OF AGING: FIGHT AGING! ON THE SCIENTIFIC DEBATE... Fight Aging!
- METHIONINE RESTRICTION EXTENDS YEAST LIFESPAN VIA AUTOPHAGY PATHWAY... Aging Cell
- IMMUNOSENESCENCE AND VACCINE EFFICACY: mTOR AND GUT MICROBIOTA INTERPLAY REVIEWED... Aging Cell
- CYCLARITY PHASE 1 SAFETY DATA: 7-KETOCHOLESTEROL CLEARANCE CONFIRMED... Fight Aging!