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In this segment Dr. Jack Kruse explains how modern green technology emits blue light that disrupts the leptin‑melanocortin optical signaling pathway and dehydrates mitochondria. He highlights that human body water content declines dramatically with age—from about 80 % in newborns to roughly 50‑55 % in the elderly—linking this loss of water to aging and reduced longevity. He further notes that the capacity to synthesize vitamin D diminishes as we get older, leading to the recommendation that older individuals should increase, not decrease, sun exposure to maintain adequate vitamin D levels.

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