What are the symptoms of overdose of vitamin B12?
Overdose of vitamin B12 is extremely rare and practically no examples have been recorded. For this reason, almost no symptoms of overdose of vitamin B12 were reported. Possible symptoms may include diarrhea or mild allergic reaction, including itching or rash. While overdose is almost never visible, it is possible that there may be an allergic reaction to B12 shots.
The recommended daily contribution (RDA) for vitamin B12 is 2.4 micrograms (MCG) for most adults and somewhat higher for pregnant and nursing women. Vitamin B12 has been found to be safe in healthy people who take 1,000 mcg a day for years. Much higher amounts are still unlikely to cause overdose of vitamin B12. This is probably because another B12 is quickly excreted by the kidneys or because it is no longer absorbed at all through a certain amount. People with a lack of B12 or other health problems may want to consult a doctor before accepting supplements B12.
Vitamin B12 is sometimes pressed for the treatment of the condition of malignant anemia, which usually includes a serious B12 deficiency. In these cases, vitamin B12 may be administered in the form of prolonged release tablets or injections. Injection is more common in people who have a reduced ability to absorb B12 when used orally. Overdose of vitamin B12 in such cases is unlikely because the doctor determines the right dose.
It is possible that an allergic reaction could occur in response to shots containing B12. In several such known cases it is not clear whether the reaction occurred to the vitamin itself or something else. It is possible that allergic reactions have occurred in response to preservatives. Since these cases did not include overdose of vitamin B12, symptoms would be symptoms of serious allergic reactions. Severe allergic reactions are medical emergencies because symptoms include difficult breaks and swellingneck, face or tongue.
While overdose is rare, B12 deficiency may occur in people who do not have meat or seniors. It is assumed that older people do not produce enough substances that the body needs to absorb B12. B12 deficiency can be quite common in individuals for more than 60 years.
It is still important to keep vitamins out of the reach of children, although the B12 is relatively safe. In the United States, iron poisoning is one of the main causes of poisoning in young children. Iron has an extended presence in accessories and multivitamins.