The two types of vitamins are water soluble and fat soluble. The water soluble vitamins are the vitamins which are daily secreted through the urine and fat-soluble vitamins are stored in the body and they are stored in the tissues and liver in the form of fat. If we take adequate water-soluble vitamins such as vitamin C and the B1(thiamine), B2(riboflavin), B3(niacin), B6(pyridoxin), B12(methyl cobalamin) under vitamin B and folic acid, there will not be any problem because they are not stored and they are secreted by the urine but whereas fat-soluble like A, D, E and K if taken more than required, can cause side effects because they are stored for a longer period in the body.
Any vitamin can have side effects when consumed in large amounts but these effects are rarely harmful. Too much of any good thing can bring with it related problems also. There could be side effects from overdose of a vitamin. To reap maximum benefit from any vitamin, it has to be used in optimal doses. Now, what is optimal depends upon the requirements of the individual and what kind of deficiencies the person is suffering from. Anything in excess will have its own side effects, which, in some cases, might be reversible but in some might cause permanent damage. Each vitamin when taken in excessive proportions has different side effects.
Here are the most common symptoms of vitamins overdoses can cause:
2. general fatigue
3. hair loss
6. joint pain
The above are the general symptoms showing but consult immediate doctor if you suspect that you are falling into dangerous situation due to vitamin overdose.