1. FISH Omega 3 Amino Acids, specifically DHA found in salmon, tuna, mackerel and sardines eaten 2 or 3 times per week can reduce the incidence of Alzheimer's 40%. Here's why: 40% of the fatty acids in your brain cells are DHA. Eating more of it maintains these levels for optimum brain health. With tuna, limit to 6 oz per meal due to higher mercury levels. (pollution) BONUS: healthier glowing skin, hair and connective tissues in joints, strengthened heart muscles and vascular health.