Are there any adverse reactions i should be aware of taking 1000mg B12?

Other Answers (2)

• Your stomach should produce a substance called Intrinsic Factor that allows your intestines to absorb the vitamin B12. Many people do not produce Intrinsic Factor on their own. You can either take a B12 supplement that contains Intrinsic Factor, such as IntrinsiB12 by Metagenix, or you can take B12 sublingually (in a quick-dissolving tablet you hold under your tongue), or with a patch or a prescription injection, nasal spray, or gel. These methods bypass the intestines. There are different types of B12. Methyl B12 is becoming more popular; it is the easiest for the body to utilize, however, some people cannot tolerate it. Depending on your genetics, you may need a less broken-down form of B12 such as cynocobalamin or hydroxycobalamin (cobalamin is the name for vit. B12). If your are an %26quot;over-methylator%26quot;, you may get a headache from methyl B12 and therefore should try hydroxy B12 instead.