Peptides can be grouped into different categories based on what they do and how they work in the body. Understanding these categories makes it easier to learn about each peptide and decide which ones you want to learn more about. Fat Loss & Metabolic Health Includes peptides and compounds that support appetite control, metabolism, blood sugar regulation, and fat loss. Examples include semaglutide, tirzepatide, retatrutide, and AOD-9604. Growth Hormone & Recovery Includes peptides that support growth hormone pathways, recovery, healing, and tissue repair. Examples include CJC-1295, ipamorelin, sermorelin, BPC-157, and TB-500. Cognitive & Mood Support Includes peptides commonly used for focus, mental clarity, stress, mood, and cognitive support. Examples include Semax and Selank. Longevity & Cellular Health Focuses on cellular health, mitochondrial function, energy production, repair, and healthy aging. Immune & Inflammation Support Includes peptides used to support healthy inflammatory responses, immune function, and recovery. Sexual Health Includes peptides such as PT-141 that work through the central nervous system and can affect libido and sexual function.