1. Long-term omega-3 supplementation could reduce Alzheimer's risk by 64%.
2. Study tracked 1,135 participants aged 73+ over 6 years.
3. Increased DHA and EPA intake linked to lower dementia risk.
4. Benefit seen strongest in APOE ε4 carriers and those with mild cognitive impairment.
5. Each 0.1 g/day increase in omega-3 intake may reduce cognitive decline risk by 8-10%. 

Source: The American Journal of Clinical Nutrition