Study summaries, research notes, and educational reference information presented in an easy-to-understand format.
KLOW combines four research peptides associated with different areas of study. Here’s a quick look at GHK-Cu, BPC-157, TB-500 and KPV—and why studying multiple pathways together has attracted research interest.
Read research note →Tirzepatide and retatrutide target overlapping metabolic pathways, but retatrutide adds glucagon receptor activity to the GIP and GLP-1 pathways. Here’s what human research tells us about how these mechanisms differ, what clinical trials have found, and what researchers are still working to understand.
Read research note →Weight loss can slow down or stall even when appetite remains well controlled. Here’s what human research tells us about changing energy needs, metabolic adaptation, daily movement, and why a plateau doesn’t necessarily mean your approach has stopped working.
Read research note →A 2026 study explored whether MOTS-C improves mitochondrial function by making existing mitochondrial machinery work more efficiently, rather than simply increasing its quantity.
Read research note →A 2026 study examined BPC-157, TB-500, and their combination in an experimental Achilles tendon repair model.
Read research note →GLP-1 signaling does not end at release; researchers continue to study how the hormone is processed and degraded.
Read research note →Research is interesting, but consistency and small wins still matter more than chasing perfection.
Read research note →Phase 3 research examined retatrutide in adults with obesity or overweight and knee osteoarthritis, including weight and pain outcomes.
Read research note →TRIUMPH-3 studied adults with severe obesity and established cardiovascular disease, with or without type 2 diabetes.
Read research note →TRIUMPH-2 studied adults with obesity or overweight and type 2 diabetes and reported changes in body weight and A1C over 80 weeks.
Read research note →Phase 3 TRIUMPH-1 results examined retatrutide in adults with obesity and reported substantial average weight reduction over 80 weeks.
Read research note →Retatrutide is an investigational single molecule designed to activate GIP, GLP-1, and glucagon receptors.
Read research note →SURMOUNT-MAINTAIN studied what happened when participants continued their maximum tolerated tirzepatide dose, reduced to 5 mg, or switched to placebo after initial weight loss.
Read research note →GLP-1 is a naturally occurring gut hormone involved in signaling related to glucose regulation, digestion, and appetite.
Read research note →A single study can be interesting, but replication, study design, population, and the total body of evidence matter.
Read research note →A quick guide to the evidence labels used throughout Z Day Research & News.
Read research note →KLOW contains GHK-Cu, BPC-157, TB-500, and KPV. The research surrounding each ingredient involves different experimental pathways.
Read research note →GLOW contains GHK-Cu, BPC-157, and TB-500. This article looks at research areas associated with each ingredient rather than claiming effects for the blend itself.
Read research note →Bacteriostatic water is sterile water containing a bacteriostatic preservative and is used as a multi-dose diluent where appropriate.
Read research note →Carnitine helps transport long-chain fatty acids into mitochondria, where they can participate in energy metabolism.
Read research note →GHK-Cu is a copper-binding peptide with decades of research involving extracellular-matrix, collagen, skin, and tissue-repair biology.
Read research note →PT-141 (bremelanotide) has been studied specifically for sexual desire and sexual dysfunction through central melanocortin signaling.
Read research note →Early melanocortin research involving Melanotan II explored pigmentation, while human studies also reported unexpected effects involving sexual function.
Read research note →2026 meta-analyses evaluated tesamorelin in people living with HIV who had HIV-associated lipodystrophy, a specific population that matters when interpreting the results.
Read research note →Sermorelin is related to growth hormone-releasing hormone biology, making it useful for understanding how the body regulates GH signaling.
Read research note →IGF-1 is an important part of the growth-hormone signaling axis and participates in growth, bone, muscle, and broader tissue biology.
Read research note →Growth hormone is released in pulses rather than at one constant level, making signaling patterns an important part of GH physiology.
Read research note →A 2026 study investigated SS-31 (elamipretide), mitochondrial bioenergetics, and neural remodeling after experimental spinal cord injury.
Read research note →A 2026 randomized study examined how a specific oral NAD+ formulation affected intracellular whole-blood NAD+ in adults ages 45–75.
Read research note →5-Amino-1MQ is a small-molecule NNMT inhibitor studied primarily in preclinical metabolic research.
Read research note →A 2026 study explored an unexpected side of MOTS-c: antibacterial and immune-related activity in cell and animal models.
Read research note →L-Carnitine participates in transporting long-chain fatty acids into mitochondria for energy metabolism.
Read research note →PT-141, or bremelanotide, is a melanocortin receptor agonist studied in sexual-desire and neuroendocrine research.
Read research note →Melanotan II is a synthetic melanocortin agonist with a history of pigmentation and melanocortin research.
Read research note →Glutathione is a naturally occurring tripeptide central to cellular antioxidant and redox systems.
Read research note →KLOW combines four peptides associated with several experimental tissue and inflammatory-signaling pathways.
Read research note →GLOW is a research blend combining GHK-Cu, BPC-157, and TB-500.
Read research note →GHK-Cu is a naturally occurring copper-binding tripeptide studied in tissue and skin biology.
Read research note →Wolverine combines BPC-157 and TB-500, two peptides studied primarily in experimental tissue-repair models.
Read research note →SS-31, also known as elamipretide, is a mitochondria-targeted peptide studied for its interaction with cardiolipin.
Read research note →NAD+ is a naturally occurring coenzyme central to cellular energy and redox biology.
Read research note →MOTS-C is a mitochondrial-derived peptide studied in cellular energy and metabolic signaling research.
Read research note →CJC No DAC and ipamorelin are studied through two different growth-hormone signaling pathways.
Read research note →Tesamorelin is a GHRH analogue with an established human clinical research history.
Read research note →Sermorelin is a GHRH-related peptide used to study pituitary growth-hormone signaling.
Read research note →Retatrutide is an investigational triple agonist targeting GIP, GLP-1, and glucagon receptors.
Read research note →Tirzepatide is a dual GIP/GLP-1 receptor agonist studied extensively in metabolic research.
Read research note →A beginner-friendly look at peptides and why researchers study them.
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