| http://www.w3.org/ns/prov#value | - However, not all studies have found melatonin to be superior to a placebo for such jet lag symptoms as fatigue, daytime sleepiness and impaired alertness.??? Anti-Ageing: Animal research indicates that melatonin may be of value in extending life--elderly mice administered the supplement lived 25% longer than their cohorts in one study--although much more investigation is needed before firm conclus
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