Under normal circumstances, teenagers need 1200 to 1500 calories to meet the needs of human energy metabolism. If you are a heavy manual worker, you need to increase the calories appropriately, generally 1500 to 1800 calories. If you eat too many calories, it will turn into fat and accumulate in the body, causing obesity. Excessive calorie intake can also induce many diseases, such as hypertension, hyperlipidemia, diabetes, atherosclerosis, coronary heart disease and so on. These are still harmful to human health.

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