Peptide Research Runs on Blood Tests Nobody Checked
📲 JOIN THE OPTILAB ENGINE → https://www.theoptilab.com/engine 👨🏼🎓 JOIN THE ACADEMY → https://www.theoptilab.com/academy 🗓️ BOOK A CONSULTATION → https://www.theoptilab.com/consultations ⚠️ DISCLAIMER: This content is for educational and informational purposes only and is not medical advice, diagnosis, treatment, or a recommendation to use any compound. Any compounds discussed may be investigational, and their safety, efficacy, appropriate dosing, long-term effects, contraindications, and drug interactions may not be established. Discussion of mechanism, preclinical or published research, or potential applications should not be interpreted as evidence of proven benefit in humans. Do not purchase, administer, use, or investigate any compound based on social media content. Always discuss health, performance, medications, supplements, or experimental therapies with a qualified healthcare professional. 🎓 ABOUT THIS VIDEO So a lot of peptide research on human blood levels comes down to one number in a screenshot, and in this episode of Peptides Are Made Up I go after where that number physically came from, like the actual machine that turned a tube of somebody's blood into a digit. A huge amount of what we think we've got on circulating peptide levels came off commercial ELISA kits that nobody's ever independently checked. When Albrecht and colleagues finally ran four irisin kits on a Western blot, all four were grabbing other shit in serum, and the authors wrote that it calls all the previous data from those kits into question. That's a whole literature that's gone. Then I get into MOTS-c, where a validated mass spectrometry method built by a doping lab in Cologne couldn't confirm the levels a commercial ELISA reported on the same plasma, which is fucking wild. Humanin can't even agree with itself on which way it moves with age, and the same Karolinska group got a clear exercise effect in 2021 and basically didn't in 2026. And look, I'm not telling you peptides are a scam, because a bad assay cuts both ways, and the null results came off the same plates. I finish with the three checks I'd run on any peptide blood test before I'd believe it, like starting with the one line in the methods that says ELISA or LC-MS. Every paper I've put on screen's linked below so you can go pull them yourself. 🏋️♂️ WORK WITH ME Apply for coaching → https://www.theoptilab.com/ 💪 FOLLOW ME Instagram: https://instagram.com/optimalnathan 🧠 TIMESTAMPS 0:00 Intro 0:11 The peptide blood test number in the screenshot 1:50 What an ELISA test actually is (vs mass spectrometry) 4:16 Irisin: the paper that burned down a literature 7:08 MOTS-c: same plasma, ELISA vs LC-MS 9:02 Humanin and age: the direction problem 10:44 When a group can't replicate itself 13:02 Peptide research: go check the method line 14:30 It cuts both ways: do peptides work? 15:59 Three checks for any peptide testing claim 18:32 The measurement layer SOURCES Four commercial irisin antibodies on Western blot: Albrecht et al., Sci Rep 2015. PMID 25749243 MOTS-c by validated LC/MS against a commercial ELISA: Knoop et al., Rapid Commun Mass Spectrom 2019. PMID 30394592 Acute exercise and circulating humanin and MOTS-c: von Walden et al., J Appl Physiol 2021. PMID 34351816 Mitochondrial-derived microproteins at rest and after exercise: Horwath et al., Exp Physiol 2026. PMID 42349896 Humanin pharmacokinetics in male rodents: Chin et al., Endocrinology 2013. PMID 23836030 Humanin, lifespan and healthspan: Yen et al., Aging (Albany NY) 2020. PMID 32575074 TAGS peptide research, peptide testing, peptide blood test, mots-c peptide, mots-c, humanin, humanin peptide, irisin, irisin hormone, elisa, elisa test, mass spectrometry, lc-ms, western blot, do peptides work, peptides explained, replication crisis, how to read a research paper, peptides, peptides are made up, optimal nathan
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