A new study reveals that a common dietary supplement, often marketed as a natural remedy for cognitive decline, may actually worsen memory function in certain individuals. Researchers found that prolonged use of the supplement led to measurable declines in verbal memory and processing speed among participants, particularly those with pre-existing mild cognitive impairment. The findings challenge long-held assumptions about the safety of over-the-counter supplements and raise concerns about unregulated marketing claims. Experts urge caution, emphasizing the need for further investigation before dismissing the supplement entirely.