A sufficient amount of vitamin B12 is required in our body for its normal and healthy functioning. If this vitamin is in deficit, it needs to be replenished with natural or artificial supplements. However, the question to be raised here is – is an overdose of vitamin B12 harmful?
This issue has been extremely contentious among researchers and doctors alike. Most people believe that an overdose is harmless and safe. If the body has a dearth of the vitamin and it is taken orally as pills or otherwise, the natural bodily functions coordinate to eliminate any excess supply in the system. Hence the extra B12 that fails to get absorbed gets pushed out and eliminated through the colon. On the other hand, injections may lead to cases of cancer due to multiplication of cells in the body.
There are a few symptoms associated with a vitamin B12 overdose out of which numbing and tingling occur in extreme situations. However, according to some scientists, there are no explicitly visible symptoms of vitamin B12 overdose. Instead, one may come across various side effects associated with this.
All in all, it has been universally accepted that there are no approved symptoms of B12 overdose. Thus, in case of excessive intake, it is advisable to contact a health physician at the earliest, to avoid unnecessary complications in our system. We must note here that the maximum limit for B12 vitamins is 2.4 micrograms per day for an adult human body and 2.6 micrograms daily in times of pregnancy. Overdose occurs when these upper limits are overshot by intake of B12.
This vitamin has been considered safe and non toxic by many. When there is vitamin B12 overdose, all of it is not absorbed by the body. However it goes down and is eliminated through the colon. The human stomach produces something what is called an Intrinsic Factor that helps our stomach to absorb the extra B12. Since this intrinsic factor goes down and down with age, old people need to supplement their diet with B12.
An overdose also known as B12 megadose may be a result of vitamin B12 deficiency and to combat this, individuals might have an extra intake of vitamin B12 leading to overdose. Firstly, before taking inputs of vitaminB12 one should test oneself and be sure of a deficiency. Cause an excess of vitamin B12 can be dangerous to one causing several types of cancer to the body. Also another danger is that there has been no upper limit embarked by doctors, thus it is very difficult to understand what is the maximum limit of vitamin B12 for the body. The cause effect relation between cancer and B12 is very simple. Vitamin B12 fails to distinguish between the healthy and unhealthy cells and therefore they fail to permit cell division between the cells. An overdose provides the extra energy needed for the cancer cells.