Please choose the correct ending to complete the given sentence: Health: [header] How to maintain a healthy cardiovascular system [title] Follow a heart healthy diet to lower your risk of heart problems. [step] The risk of heart problems is significantly lower in patients who eat a heart healthy diet. A heart-healthy diet contains more fiber, vitamins, minerals and less calories and fats, especially saturated fats and trans-fats.

Ending1: [substeps] Each person is different: products in particular are more important to heart healthy than foods in general. Breads, breakfast cereals, processed products and low-protein foods also count. Ending2: [substeps] Among meats, red meat contain bad fats, so it should be avoided and poultry and fish should be eaten instead. Salt, sugar and artificial sweeteners should also be avoided. Ending3: According to the mayo clinic, you should eat 57 oz (150 g) of red meat per day. Eat a half-teaspoon of nuts or seeds 1 day per day. Ending4: [substeps] An effective diet for a healthy heart is to avoid nutrient-dense foods such as processed meats, fruits and vegetables. Both processed and nutrient-dense foods exclude iron.

Answer format: ending1/ending2/ending3/ending4