Insects are increasingly recognized as a promising source of nutrition for humans and animals. Not only do they offer high?quality protein, essential amino acids, unsaturated fats, vitamins and minerals, but they can also be reared with far lower environmental footprint than conventional livestock. Many insect species (e.g. black soldier fly, crickets, mealworms) are being studied and used both for human food (entomophagy) and as feed ingredients for livestock, fish, poultry and pets. Key drivers include rising global protein demand, food waste, land use constraints, and climate change. However, challenges remain: consumer acceptance, regulations, food safety, cost of production, and scaling up insect farming. With supportive policy, improved processing, and continued research, insects could be an important component of sustainable food systems.