Hunger: The desire for FOOD generated by a sensation arising from the lack of food in the STOMACH.Satiety Response: Behavioral response associated with the achieving of gratification.Appetite: Natural recurring desire for food. Alterations may be induced by APPETITE DEPRESSANTS or APPETITE STIMULANTS.Food Supply: The production and movement of food items from point of origin to use or consumption.Feeding Behavior: Behavioral responses or sequences associated with eating including modes of feeding, rhythmic patterns of eating, and time intervals.Appetite Regulation: Physiologic mechanisms which regulate or control the appetite and food intake.Eating: The consumption of edible substances.Ghrelin: A 28-amino acid, acylated, orexigenic peptide that is a ligand for GROWTH HORMONE SECRETAGOGUE RECEPTORS. Ghrelin is widely expressed but primarily in the stomach in the adults. Ghrelin acts centrally to stimulate growth hormone secretion and food intake, and peripherally to regulate energy homeostasis. Its large precursor protein, known as appetite-regulating hormone or motilin-related peptide, contains ghrelin and obestatin.Energy Intake: Total number of calories taken in daily whether ingested or by parenteral routes.Meals: A portion of the food eaten for the day, usually at regular occasions during the day.Strikes, Employee: Work-related situations in which the employees as a group refuse to work until certain conditions of employment are granted by the employer.Food: Any substances taken in by the body that provide nourishment.Peptide YY: A 36-amino acid peptide produced by the L cells of the distal small intestine and colon. Peptide YY inhibits gastric and pancreatic secretion.Thirst: A drive stemming from a physiological need for WATER.Dissent and Disputes: Differences of opinion or disagreements that may arise, for example, between health professionals and patients or their families, or against a political regime.Food Assistance: Food or financial assistance for food given to those in need.Hyperphagia: Ingestion of a greater than optimal quantity of food.Peptide Hormones: Hormones synthesized from amino acids. They are distinguished from INTERCELLULAR SIGNALING PEPTIDES AND PROTEINS in that their actions are systemic.Bulimia: Eating an excess amount of food in a short period of time, as seen in the disorder of BULIMIA NERVOSA. It is caused by an abnormal craving for food, or insatiable hunger also known as "ox hunger".Postprandial Period: The time frame after a meal or FOOD INTAKE.Pleasure: Sensation of enjoyment or gratification.Aspartame: Flavoring agent sweeter than sugar, metabolized as PHENYLALANINE and ASPARTIC ACID.Gastric Emptying: The evacuation of food from the stomach into the duodenum.Public Assistance: Financial assistance to impoverished persons for the essentials of living through federal, state or local government programs.