For generations, the human pursuit of a healthy heart has been shaped as much by fear as by knowledge — fear of fat, fear of eggs, fear of the very foods that nourish us. Now, nutritional science offers a quieter corrective: that certain fats, far from being adversaries, are among the most powerful allies the cardiovascular system has. Seven foods — walnuts, chia seeds, olive oil, almond butter, full-fat yogurt, sardines, and eggs — carry within them the chemistry of protection, asking only that we learn to choose with intention rather than anxiety.