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"RESISTANCE" CLAIMS IN FOOD ADVERTISING
Food advertising abounds with vague "resistance" claims. Certain foods or their constituents are alleged to increase "resistance," implying body "resistance," which popularly signifies ability of the individual to keep well or healthy or not to suffer untoward effects from bacteria, infections, fatigue, exposure to cold and wet, loss of sleep, and the like.A healthy body is free from disease; it and its parts function normally. The tissues are physiologically sound, body cells function efficiently, there is a normal production of internal secretions or hormones, a normal power to produce immunity antibodies, and the many reactions of metabolism proceed without interference. Such a healthy body possesses a maximum "resistance" for the particular individual. Any influence disturbing its functioning, metabolism or structure may adversely affect "resistance." The potency and duration of the disturbing factor determine the degree of the breakdown of "resistance" and consequent effect on health.
Committee on Foods. JAMA. 1934;102(2):130–131. doi:10.1001/jama.1934.02750020042012