The bottom line from my perspective: Yes, vitamin C probably has some antitumor activity for some tumors, but as I contemplate the evidence for this effect the word “underwhelming” comes to mind, as does one of my favorite metaphors, namely the long run for a short slide. Apparently there are a lot of people who like getting their butts dirty sliding into base after a long run, though, because the attraction to vitamin C still lives on despite unimpressive evidence. Naturally, the authors of the phase I trial suggest using vitamin C in combination with chemotherapy, which is a perfectly reasonable approach for drugs that don’t show any objective evidence of activity as a single agent. However, this will not be easy, given that the sheer mass and volume of ascorbate that must be administered and the very high concentrations that are required even in the best case scenario could easily interfere with other chemotherapeutic agents.