External non-physiological factors modulate physiologically derived hunger and satiety signals. Non-physiological factors such as hedonic (palatability, taste, texture, odour), social (culture, religion), psychological (preferences, aversions, emotions, dieting behaviour), environmental (temperature, time of day, other people), economic (cost, availability) and pharmacological (anorectants) factors influence food intake. The extent to which different individuals respond to these various factors may vary markedly. This may explain some discrepancies among human food intake studies, and some reports of high between-subject variability.
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Find out why long exhausting workouts may do more harm than good. Most of the body-building workout and diet regimens out there are designed for the guys that gain muscle and fat easily. They focus on eating less and working out more in order to cut the excess fat from their bodies while adding needed muscle tone.