As weâre getting deeper into fall and starting to get hints of the arrival of winter, many people are stocking up on vitamins to fight off winter illnesses. It may seem safe and natural, but could you be doing yourself more harm than good when supplementing with vitamins?
Thereâs a very good chance you could be if youâre making certain choices. Iâm here to tell you how, and to expose the hidden dangers of megadose vitamins.
Megadose Vitamins: Doing You Harm?
I donât want to scare you, but itâs quite possible the âmegadoseâ bottles of vitamin C, D, and E you see on store shelves could lead to cancer, cardiovascular disease, not to mention a waste of your hard-earned cash.
Look, no one is going to blame you for thinking that natural means safe, and that getting more of something natural ultimately seems better. Itâs completely intuitive.
Vitamin C Could Cause Stomach Problems
Let me put it this way: do you think itâs a good idea to sit down and eat seven or eight whole cantaloupes?
Probably not. But thatâs exactly how many youâd have to eat to get the same amount of vitamin C contained in a single 1,000-milligram (mg) megadose tablet of vitamin C.
The daily recommended dose for vitamin C is actually 75-120 mg, and although taking up to 2,000 mg can be safe, it is not recommended, especially because doing so consistently can result in side effects like an upset stomach and diarrhea.
And more of the vitamin doesnât necessarily mean more benefits: people who take vitamin C to prevent colds donât get them any less frequently than those who donât, and using it as a treatment wonât have any impact on symptoms.
Vitamins E, A Could Up Cancer Risk
Another popular antioxidant supplement is vitamin E. Most people only need about 20 mg of vitamin E per day, which can be attained by eating about 30 almonds. Supplement dosages are often 50 times that amount…and itâs totally useless! Furthermore, there is research showing that taking too much vitamin E can increase a manâs chances of getting prostate cancer or a smokerâs risk of lung cancer!
And itâs a similar story for people taking vitamin A (beta-carotene) supplements. Research shows smokers who take vitamin A supplements have a greater risk of lung cancer than those who donât.
Vitamin D Could Lead to Heart Disease
One of the most common winter-time supplementsâespecially for people in colder, darker climatesâis vitamin D. But guess what? There is virtually no evidence to suggest that taking more vitamin D than recommended is more beneficial than taking the daily recommended amount. And get this: one study even shows that people with low vitamin D levels are just as likely to experience cardiovascular disease as those with really high blood levels!
I would like to emphasize that in some cases taking high amounts of vitamin D is recommended. For example, a friend of mine was instructed to take 10,000 International Units (IU) per day for a set period in order to bring her levels up. But this was an instruction from her doctor and she was warned to only do it for a limited time. Typical recommendations for vitamin D intake are generally in the 600 IU per day range, with the upper limit being around 4,000 IU a day. If you take 4,000 IU or more per day for an extended period, you can run into all kinds of complications like kidney stones, high blood calcium, arterial calcium deposits, and calcification in soft tissue like muscles, organs, tendons, ligaments and other areas.
âNaturalâ Doesnât Always Mean Safe
The moral of the story here is that natural is not synonymous with safe, nor is more necessarily better. You need to know about the risks of megadose vitamins before you blindly buy into their benefits. And Iâm going to tell you something youâve probably heard a million times before, but itâs always worth repeating: a healthy, balanced diet is the best way to get all the nutrition you need. You canât overdose on vitamins or experience vitamin toxicity when you get your nutrients through food. And for vitamin D, which isnât as easy to get through diet, I try to get 20-40 minutes of sun per day (harder in the winter months, of course!). If thatâs too difficult, then take a supplement at a healthy range. Being smart about supplements can save your health and money!
Sources for Todayâs Article:
âMegadoses of popular vitamins may do more harm than good, experts warn,â CBC News web site, last updated November 13, 2015; http://www.cbc.ca/news/health/megadoses-vitamins-more-harm-than-good-1.3317534?cmp=rss.
âVitamin C,â National Institutes of Health web site, February 2, 2015; https://www.nlm.nih.gov/medlineplus/ency/article/002404.htm.
âSelenium and Vitamin E Cancer Prevention Trial (SELECT) Questions and Answers,â National Institutes of Health web site, July 7, 2015; http://www.cancer.gov/types/prostate/research/select-trial-results-qa.
Al Mheid, I., et al., âVitamin D and cardiovascular disease: is the evidence solid?â European Heart Journal, published online June 10, 2013; doi: http://dx.doi.org/10.1093/eurheartj/eht166 eht166.