Digital trace data from four weeks of online activity reveals that adults over 65 distribute low-quality health content at rates 3-5 times higher than users under 40. The pattern emerges from reduced ability to evaluate source credibility and algorithmic literacy rather than general cognitive decline. This age-related vulnerability to health misinformation represents a critical blind spot in our digitally-mediated healthcare environment. While younger generations grew up developing intuitive skepticism toward online claims, older adults often apply offline trust frameworks to digital spaces where traditional authority markers are easily manipulated. The implications extend beyond individual health decisions to family networks, where older relatives frequently serve as health information gatekeepers. As telehealth and digital wellness platforms become standard care delivery methods, this literacy gap could amplify health disparities. The research suggests that current platform designs inadvertently exploit cognitive patterns more common in older users. Addressing this vulnerability requires both improved platform accountability and targeted digital literacy interventions, particularly since this demographic controls significant healthcare spending and influences family health decisions across generations.