Food defense is the protection of food products from intentional contamination or adulteration by biological, chemical, physical, or radiological agents introduced for the purpose of causing harm. It addresses additional concerns including physical, personnel and operational security. the fraudulent, intentional substitution or addition of a substance in a product for the purpose of increasing the apparent value of the product or reducing the cost of its production, i.e., for economic gain. EMA includes dilution of products with increased quantities of an already-present substance (e.g., increasing inactive ingredients of a drug with a resulting reduction in strength of the finished product, or watering down of juice) to the extent that such dilution poses a known or possible health risk to consumers, as well as the addition or substitution of substances in order to mask dilution. Food defense is the protection of food products from intentional contamination or adulteration by biological, chemical, physical, or radiological agents introduced for the purpose of causing harm. It addresses additional concerns including physical, personnel and operational security. Food defense is one of the four categories of the food protection risk matrix which include: food safety, which is based on unintentional or environmental contamination that can cause harm; Food fraud, which is based on intentional deception for economic gain; and Food quality, which may also be affected by profit-driven behaviour but without intention to cause harm. Overarching these four categories is food security, which deals with individuals having access to enough food for an active, healthy life. Food protection is the umbrella term encompassing both food defense and food safety. These six terms are often conflated. Along with protecting the food system, food defense also deals with prevention, protection, mitigation, response and recovery from intentional acts of adulteration.