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Whether BDNF relates to AD pathophysiology in dementia-free individuals and under what conditions remain unknown. Pain, a prevalent midlife condition and AD risk factor, engages BDNF signaling. We examined whether frequent pain moderated associations between BDNF and AD plasma biomarkers (ptau217, BD-tau) in early midlife (Mean age=45.8). Among individuals with frequent pain, higher BDNF was associated with lower BD-tau and ptau217. No associations emerged among pain-free individuals. 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