The effect of vitamin C in cancer has been a subject of great controversy; mainly because of the inconsistent results obtained by oral intakes of ascorbate when used as an…
Context Mounting evidence indicates that vitamin B6, a coenzyme involved in nearly 100 enzymatic reactions, may reduce the risk of colorectal cancer. Objective To conduct a systematic review with meta-analysis…
Purpose While the benefits of ascorbic acid (vitamin C, ascorbate) as an essential nutrient are well established, its effects on tumor cells and in tumor treatment are controversial. In particular,…
Context Multivitamin preparations are the most common dietary supplement, taken by at least one-third of all US adults. Observational studies have not provided evidence regarding associations of multivitamin use with…