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Why can't your body make vitamins?
This is an interesting question whose answer is straightforward. Since we are unable to synthesise vitamins or can only do so in amounts insufficient to meet our needs, they must be taken from the diet or from some artificial source, hence vitamins are called essential nutrients. Since the body very simply cannot synthesise many of the vitamins it needs, a good multivitamin is essential. If a vitamin is absent from the diet or is not properly absorbed by an organism, a deficiency disease may develop or the individual may feel tired, irritable and not be as mentally alert.
To use a car analogy as an example, bear in mind that you only get one body, but you can always obtain a new car. Think of your body as a well designed machine, with trillions of interlocking parts, nuts and nuts if you will, that all help each other and work together to effectively sustain life on a daily basis. This, at least in a simplified way, is how your body works, but we all know the kinds of hurtful effects that malnutrition, disease and injury can have on a person.
When your body lacks the important raw ingredients it needs to run properly, a cascading effect occurs that influences every one of your body's systems and causes them to operate badly or even cease functioning altogether. Eating supplemental vitamins is akin to using high performance fuel for your car, only billions of times better and far less expensive. Your body runs more steadily and is able to better evade breaking down and disease. Your immune system works better, your thinking clears and your body operates better when it has the essential nutrients it needs. Unfortunately a side effect of our diet means that a vast majority of people every day are lacking the most basic nutrition warranted, let alone finding optimum nutrition levels.
There are two groups of essential vitamins, each classified according to the materials in which they dissolve.
Water-soluble vitamins dissolve in water, are not kept and are evacuated regularly in urine. We need a continuous supply of these vitamins. The water-soluble vitamins are Vitamin C and the B-complex vitamin. Water-soluble vitamins are often destroyed or removed during food storage or cooking. To reduce vitamin loss, refrigerate fresh vegetables, and hide grains away from strong light.
A, D, E and K, dissolve in fat before they are absorbed in the blood and are kept in the liver.
An essential point to note is that we obviously need vitamins, to work effectively and be fit. Our bodies cannot make many of the vitamins that we require on a daily basis. We must find them in our diet, and by dosing a multivitamin supplement.