Codex Alimentarius is an international food standards body established by the World Health Organization and Food and Agriculture Organization to protect consumer health and ensure fair practices in food trade. It has developed over 200 standards covering issues like food safety, labeling, and additives. Codex standards are voluntary but used by many countries and important for facilitating international food trade while also guiding governments and businesses on food safety best practices. Key challenges include limited resources and participation by some countries as well as keeping up with a rapidly evolving global food system.