On the antitumour effects of B vitamins

In periodicals, vitamins and vitamin-mineral complexes (VMCs) are “accused” of having allegedly carcinogenic effects. The results of a systematic review of the literature on B vitamins presented in this paper clearly show that vitamins have at least no influence on tumour risk. When analysing experimental and clinical data on this topic, particular attention should be paid to the dosage of vitamins in monotherapy and when used as part of a VMCs.