Please choose the correct ending to complete the given sentence: Health: [header] How to gain weight fast (for women ) [title] Consume an additional 500 calories per day. [step] It is generally safe to gain 1-2 pounds (0.45-0.91 kg) per week. To reach this goal, add an extra 500 calories to your diet everyday.

Ending1: The healthiest way to do this is to eat more nutrient-dense foods. [substeps] To keep track of what you're eating, use a health app, such as myfitnesspal. Ending2: [substeps] Add up your daily calorie intake and perform an internet search to find the number of calories you need each day. For example, add an extra 500 for every 1 1/2 cups (180 grams) of food you eat per day. Ending3: [substeps] If you eat more than 500 calories a day, you risk increasing your risk of developing cardiovascular disease, bone deformities, and diabetes. [title] Drink plenty of water throughout the day. Ending4: [substeps] For example, if you eat 3 , 500 calories per day, you can gain 1 pound (0.45 kg) per week. [title] Have your calorie intake meet your daily calorie needs.

Answer format: ending1/ending2/ending3/ending4