long and healthy live

That is just from a doctor's perspective, who is a scientist, so it's a scientific opinion, biological requirements. If we were to abide only to the scientific natural biological requirements, then there would be no need to get a job and earn money, all we need to do is keep mating and have lots of kids, for that is nature's intention to get the human race carrying on. But we humans have evolved into beings with high intellect, sensitivity and reasonaing. Therefore, we pursue the enjoyment of life, that is why we have created so many types of food to 'enjoy'! Of course, we should eat in proportions and not binge on everything, so to enjoy life in moderation! :) xx

It's always best to live a healthy life while you're still young. Being young doesn't mean we can just abuse our bodies with unhealthy food or toxic lifestyles. With healthy foods, eating a balance diet and ample amount of exercise, we are taking good care of ourselves and giving ourselves the chance to live longer and do more adventurous stuff even when we grow older.