One small handful of walnuts a day may be enough to move the needle for both the heart and the brain. Nutrition studies increasingly converge on a daily intake of roughly 20–30 grams, around 7–10 kernels, as the point where measurable benefits appear in clinical markers.Walnuts provide alpha-linolenic acid, a plant-based omega-3 fatty acid, along with unsaturated fats that can help improve lipid p...More