31 replies to this topic

[kurdishfella]

i actually get more energy the higher dose i go to some extent

[ta5]

According to the Linus Pauling Institute, no upper intake level for B12 has been set because no toxic effects have been found. It's remarkable given how conservative most nutritional guidelines are.

 

No toxic or adverse effects have been associated with large intakes of vitamin B12 from food or supplements in healthy people. Doses as high as 2 mg (2,000 μg) daily by mouth or 1 mg monthly by intramuscular (IM) injection have been used to treat pernicious anemia without significant side effects (84). When high doses of vitamin B12 are given orally, only a small percentage can be absorbed, which may explain the low toxicity (4). Because of the low toxicity of vitamin B12, no tolerable upper intake level (UL) has been set by the US Food and Nutrition Board (17).

 

 

The side effects that started this thread were removed from Wikipedia years ago.