Supplements and Cancer Prevention: A Cautionary Tale

Can there possibly be too much of a good thing?  Supplements such as folic acid can be vital if your diet is deficient in folate (as most people's diets were prior to the mandated fortification of the US), especially if you are planning to have a child...and in the case of folate deficiency, it is clear that DNA is likely to become damaged, potentially causing tumors- but if it is so important to have enough, can having too much also be a problem?  Read all about it at JNCI -

http://jnci.oxfordjournals.org/content/104/10/NP.6.full?etoc