https://vikinglabs.co/research Research articles, guides, and analysis from Viking Labs — premium research peptides. en-us Sun, 05 Apr 2026 09:47:36 GMT https://vikinglabs.co/research/glp-1-peptide-revolution From exendin-4 to retatrutide — the complete history and future of GLP-1 receptor agonists in obesity, diabetes, cardiovascular, and neurological research. Fri, 03 Apr 2026 00:00:00 GMT https://vikinglabs.co/research/glp-1-peptide-revolution https://vikinglabs.co/research/peptides-longevity-research-2026 An overview of the most promising peptide compounds in aging research — from NAD+ precursors and senolytics to telomerase activators and mitochondrial peptides. Fri, 03 Apr 2026 00:00:00 GMT https://vikinglabs.co/research/peptides-longevity-research-2026 https://vikinglabs.co/research/antimicrobial-peptides-resistance How naturally occurring host defense peptides like LL-37, defensins, and magainin could address the growing crisis of antibiotic-resistant infections. Fri, 03 Apr 2026 00:00:00 GMT https://vikinglabs.co/research/antimicrobial-peptides-resistance https://vikinglabs.co/research/peptide-drug-delivery-2026 Breaking the injection barrier — how new delivery technologies are making peptide therapeutics accessible through oral pills, nasal sprays, and skin patches. Fri, 03 Apr 2026 00:00:00 GMT https://vikinglabs.co/research/peptide-drug-delivery-2026 https://vikinglabs.co/research/neuroplasticity-peptides How peptides that modulate neurotrophic factors are being studied for cognitive enhancement, neuroprotection, and recovery from neurological injury. Fri, 03 Apr 2026 00:00:00 GMT https://vikinglabs.co/research/neuroplasticity-peptides https://vikinglabs.co/research/tirzepatide-dual-agonist How the first dual incretin agonist achieved unprecedented weight loss and glycemic outcomes in the SURMOUNT and SURPASS clinical programs. Sat, 28 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/tirzepatide-dual-agonist https://vikinglabs.co/research/cerebrolysin-neuroprotection A multimodal peptide preparation studied for stroke recovery, traumatic brain injury, and neurodegenerative disease with over 200 clinical studies. Sat, 28 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/cerebrolysin-neuroprotection https://vikinglabs.co/research/melanotan-ii-melanocortin Research on the synthetic alpha-MSH analogue affecting pigmentation, appetite, and sexual function through MC1R-MC5R activation. Wed, 25 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/melanotan-ii-melanocortin https://vikinglabs.co/research/peptide-reconstitution-guide Step-by-step protocol for reconstituting peptide powder with bacteriostatic water, including concentration calculations and storage. Wed, 25 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/peptide-reconstitution-guide https://vikinglabs.co/research/reading-hplc-coa Understanding chromatography reports --- peaks, purity ranges, retention times, and red flags in peptide COAs. Sun, 22 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/reading-hplc-coa https://vikinglabs.co/research/foxo4-dri-senolytic Exploring the peptide that disrupts the FOXO4-p53 interaction to selectively eliminate senescent cells in aging research. Fri, 20 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/foxo4-dri-senolytic https://vikinglabs.co/research/ipamorelin-ghrelin-mimetic The most selective ghrelin mimetic — promoting GH release without significant effects on cortisol, prolactin, or appetite. Fri, 20 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/ipamorelin-ghrelin-mimetic https://vikinglabs.co/research/peptide-storage-stability Evidence-based storage protocols --- freezer vs refrigerator, light sensitivity, reconstituted vs lyophilized shelf life. Fri, 20 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/peptide-storage-stability https://vikinglabs.co/research/bpc-157-vs-tb-500 Head-to-head comparison --- NO pathway vs actin sequestration, gut vs musculoskeletal, combination protocols. Fri, 20 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/bpc-157-vs-tb-500 https://vikinglabs.co/research/peptide-solubility-guide Which peptides dissolve in water, DMSO, or acetic acid --- and why solvent choice matters for experiments. Wed, 18 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/peptide-solubility-guide https://vikinglabs.co/research/nad-vs-nmn-vs-nr Biosynthesis pathways, bioavailability, Yoshino vs Trammell data, which crosses cell membranes. Wed, 18 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/nad-vs-nmn-vs-nr https://vikinglabs.co/research/pentosan-polysulfate-joint A semi-synthetic polysaccharide studied for osteoarthritis, interstitial cystitis, and cartilage repair through multiple anti-inflammatory pathways. Sun, 15 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/pentosan-polysulfate-joint https://vikinglabs.co/research/understanding-peptide-purity HPLC purity vs net peptide content, TFA salt weight, batch variability, and what standards exist. Sun, 15 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/understanding-peptide-purity https://vikinglabs.co/research/retatrutide-vs-semaglutide-vs-tirzepatide Receptor profiles, clinical trial weight loss data, side effects, mechanistic differences. Sun, 15 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/retatrutide-vs-semaglutide-vs-tirzepatide https://vikinglabs.co/research/ll-37-antimicrobial Research on the only human cathelicidin --- its role in innate immunity, wound healing, and potential applications in antibiotic-resistant infection research. Thu, 12 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/ll-37-antimicrobial https://vikinglabs.co/research/selank-vs-semax Tuftsin vs ACTH analogue, anxiolytic vs cognitive, GABAergic vs BDNF mechanisms. Thu, 12 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/selank-vs-semax https://vikinglabs.co/research/snap-8-wrinkle How an octapeptide mimics botulinum toxin A mechanism to reduce SNARE complex formation and muscle contraction at the neuromuscular junction. Tue, 10 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/snap-8-wrinkle https://vikinglabs.co/research/ghk-cu-vs-bpc-157-wound-healing Collagen remodeling vs angiogenic repair, TIMPs/decorin vs NO/VEGF, topical vs systemic. Tue, 10 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/ghk-cu-vs-bpc-157-wound-healing https://vikinglabs.co/research/kisspeptin-reproductive The neuropeptide that controls GnRH release and its emerging role in fertility research, metabolic regulation, and behavioral neuroscience. Thu, 05 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/kisspeptin-reproductive https://vikinglabs.co/research/epithalon-pineal The tetrapeptide Ala-Glu-Asp-Gly and its studied effects on pineal function, circadian rhythm normalization, and neuroendocrine aging. Thu, 05 Mar 2026 00:00:00 GMT https://vikinglabs.co/research/epithalon-pineal https://vikinglabs.co/research/aod-9604-lipolysis How a modified fragment of human growth hormone (hGH 176-191) stimulates lipolysis without the growth-promoting effects of full GH. Wed, 25 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/aod-9604-lipolysis https://vikinglabs.co/research/mtor-pathway-peptides mTORC1 vs mTORC2, downstream targets, autophagy regulation, rapamycin mechanism, MOTS-c AMPK activation. Wed, 25 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/mtor-pathway-peptides https://vikinglabs.co/research/sirtuin-nad-axis How SIRT1-SIRT7 coordinate metabolic adaptation, DNA repair, and stress resistance via NAD+ cofactor. Fri, 20 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/sirtuin-nad-axis https://vikinglabs.co/research/dihexa-cognitive A hexapeptide analogue of angiotensin IV with potency 10 million times greater than BDNF in promoting synaptic connectivity and cognitive function. Sun, 15 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/dihexa-cognitive https://vikinglabs.co/research/melanocortin-system MC1R-MC5R --- pigmentation, appetite, sexual function, inflammation through one peptide signaling family. Sun, 15 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/melanocortin-system https://vikinglabs.co/research/growth-hormone-axis Hypothalamic-pituitary GH axis and how CJC-1295, ipamorelin, GHRP-6 modulate pulsatile GH release. Tue, 10 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/growth-hormone-axis https://vikinglabs.co/research/nitric-oxide-peptides How multiple research peptides converge on the NO-cGMP pathway --- endothelial function, cytoprotection, tissue repair. Thu, 05 Feb 2026 00:00:00 GMT https://vikinglabs.co/research/nitric-oxide-peptides