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It's $4,300 a year to view that journal, so you'll forgive me if I don't give you the link. Will the author's description of the conclusions suffice?
Thirst is, in fact, a very sensitive mechanism for regulating fluid intake, according to Barbara Rolls, PhD, a nutrition researcher at Pennsylvania State University. In a 1984 study in Physiology and Behavior, she and a group of colleagues at Oxford University followed a group of men as they went through their normal day. Left to their own devices, the volunteers became thirsty and drank long before their hydration levels showed any signs of dipping.
Says Rolls, "If people have access to water or other fluid beverages, they seem to do a very good job of maintaining hydration levels."
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