What keep us healthy?

A lot of things can keep us healthy: a right amount of sleep, exercise, fresh air, having friends, and healthy food. Eating healthy food means not eating too much and not eating the same thing always. Our food is composed of three components: fats, carbohydrates, and proteins. Carbohydrates like sugar and starch, are present in potatoes. We also need vitamins and minerals, such as salt or calcium, to stay healthy. We need to brush our teeth often and keep ourselves clean to keep away the bacteria and remain healthy.

Why are vitamins necessary in diet?

Vitamins assist the body in utilizing the nutrients. They are not suppliers of energy like fats or carbohydrates, but help the body in absorbing minerals such as calcium, magnesium, or sodium required places. Vitamins also help in the correct functioning of enzymes that help convert food into components useful for the body. Since the body cannot synthesize vitamins, they need to be supplied from outside.

What happens when we eat too much?

If we eat more than what we really need, our body converts the excess food into fat and we become bulky and heavy. The skeleton and the joints are not designed to carry too much continuous load; hence, at some point of time the back and the joints begin to ache. Any kind of fast movement becomes tiring and strenuous for the heart and the circulatory system. We get out of breath very easily. Fat People are often the butt of people's joke. Although it is difficult for them they can get in shape again through training and healthy eating.

Why must we brush our teeth every day?

When we eat, small particles of food get stuck between the teeth, giving rise to bacteria. They reproduce and create dental problems like caries. At first, these are only holes in the enamels of the teeth, but as they become deeper they can be very painful. Chewing becomes difficult with bad teeth, and the jaw looks deformed if some teeth are missing. If the bacteria are not removed, they can enter your body through the mouth. The writing of a Greek doctor Hippocrates are a proof that the connection between hygiene and  disease was know 3000 years ago. So, even the ancient Greeks brushed their teeth.

How can we protect ourselves against bacteria?

We do not need to protect ourselves against all bacteria. Some live inside our body and are even very important to us, such as the intestinal bacteria. We fall sick only if there are too many bacteria or some harmful bacteria unknown to the body comes from outside. This can happen easily via cuts and bruises on the skin or when our bodies are weak. Antibiotics help against bacterial infections. Unfortunately, they are not always effective because many bacteria  have already become 'resistant' the them. The best  way to stay healthy is to strengthen our own immune system. A diet rich a vitamins, i.e., fruits and vegetables and exercise in fresh air helps in keeping us fit.

Is playing sports healthy?

Playing a sport is healthy because it trains the muscles, improves blood circulation, and increases the supply of oxygen to the body cells. Improved oxygen supply to the brain improves concentration, and physical movement excites the nerve paths in the brain. We, therefore, become mentally more efficient. Sometimes professionally played sports may cause excessive strain on the body, but leisure sports that are fun can strengthen our immune system and are necessary for our well being.