Do you take supplements? At the moment I take a product called ‘Men’s One™ Energy Multivitamin’ by Rainbow Light. I’ve been wondering how helpful or effective the various ingredients of a multivitamin tablet might be in preventing a re-emergence of my prostate cancer at some time in the future. It doesn’t take more than a few mouse clicks to encounter the confusing and contradictory information available on the web.
Lets start at the top of the list of ingredients: Vitamin A (as 50% Beta Carotene, 50% Palmitate)- 5,000IU. An apparently authoritative study: Serum Vitamin A and Subsequent Development of Prostate Cancer in the First National Health and Nutrition Examination Survey Epidemiologic Follow-up Study tells me that taking Vitamin A is good for Prostate Cancer prevention – ‘a statistically significant trend was observed for increased risk of prostate cancer with decreasing levels of serum vitamin A.’ On the other hand, Vitamin A and prostate cancer in elderly men: enhancement of risk another apparently authoritative study tells me: ‘In the men greater than or equal to 70 years, risk increased directly with the amount of vitamin A consumed’. Admittedly this study reported no increased risk for men under 70.
So does this mean that I take Vitamin A until I’m 70 and then stop??
Lets look at the next ingredient on my list: Vitamin C (as Ascorbic Acid)- 120mg. First up, the Louis Warschaw Prostate Cancer Center at Cedars-Sinai informs me that ‘There is much controversy regarding the relationship between vitamin C intake and prostate cancer risk. Some studies show that increased levels of vitamin C reduce one’s risk for prostate cancer. Other studies show that vitamin C has no effect on this risk.’ But in the very next paragraph we learn that prostate cancer tumors consume large amounts of Vitamin C. Hmmmm!!! Let’s investigate further.
A study entitled ‘Effect of vitamin C on prostate cancer cells in vitro: Effect on cell number, viability, and DNA synthesis‘ concludes: ‘results also suggest that ascorbic acid is a potent anticancer agent for prostate cancer cells.’ (Prostate 32:188-195, 1997. © 1997 Wiley-Liss, Inc.) Sounds promising – but wait: on November 16th Healthday reported on a ten year study of 15,000 men over 50 that determined there was no anti cancer effect from taking Vitamin C.
So where does this lead? It certainly discourages me from researching further down the list of ingredients on the back of my multivitamin pack. I suspect that I will find similar conflicting studies about Vitamins D, E, K, B6 etc, not to mention Calcium, Magnesium and Zinc. It is clear that no one has the final best answer regarding supplements and prostate cancer prevention/treatment.
Twenty-five hundred years ago Gautama Buddha advocated ‘the middle way’. I think I’ll take that advice and apply it here. I’ll continue taking my multivitamin to support general health while making sure that I get good nutrition from a healthy diet. I’ll exercise – in moderation- and get plenty of fresh air and sunlight. I’m still taking donations for the holiday in Hawaii:-)





