10 Supplements That Do Not Work as Advertised

Multivitamins May Not Have Any Benefits
Millions of people take daily multivitamins, but they may do just as well to skip them. © serggod/iStock/Thinkstock

Nearly 40 percent of American adults take a daily multivitamin, and more than 50 percent of American adults take some sort of dietary supplement (the most popular is a daily calcium supplement) [source: Fetters]. While evidence suggests that calcium may actually have a positive impact on your health, there doesn't seem to be any evidence any other ingredient in your multivitamin does anything positive for you. At all. And in addition to that bombshell, some research suggests those of us who take vitamins may die sooner than our friends who skip the supplements. Yes, you read that correctly; in 2011 The Iowa Women's Health Study found multivitamins didn't offer any health benefits to the women taking them -- and also found an association between taking dietary supplements and a shortened lifespan [source: Mursu]. It's entirely possible that this is due to people having a false sense of security about their health; taking a multivitamin may make them less likely to take care of themselves in other ways.

The best thing to do is ditch the daily vitamins and instead make sure you eat a healthy, balanced diet.

Author's Note: 10 Supplements That Do Not Work as Advertised

As a person who tries to remember to take her multivitamin (and maybe a few other supplements here and there), I was really curious what I'd find when I started looking into the pros and cons of dietary supplements. Should we bother taking them? Overwhelmingly the research for this article points to, well, maybe but maybe not -- at least not a multivitamin. (Did you see that part about the shortened lifespan?) Unless you're taking a supplement because you have a legitimate deficiency, such as iron supplementation for iron-deficiency anemia, you'd be best off with a healthy, balanced diet and exercise rather than a does-it-or-doesn't-it cure-all pill.

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  • Allolio, B; and W Arlt. "DHEA treatment: myth or reality?" Trends in Endocrinology and Metabolism. Vol. 13, no. 7. Pages 288-294. September 2002. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pubmed/12163230
  • American Cancer Society. "Yohimbe." Nov. 28, 2008. (May 31, 2014) http://www.cancer.org/treatment/treatmentsandsideeffects/complementaryandalternativemedicine/herbsvitaminsandminerals/yohimbe
  • American Diabetes Association (ADA). "Living With Diabetes: Oral Medications - What Are My Options?" Feb. 20, 2014. (May 31, 2014) http://www.diabetes.org/living-with-diabetes/treatment-and-care/medication/oral-medications/what-are-my-options.html
  • Bailey, Christoper H. "Improved Meta-Analytic Methods Show No Effect of Chromium Supplements on Fasting Glucose." Biological Trace Element Research. Vol. 157, no. 1. Pages 1-8. January 2014. (May 31, 2014) http://link.springer.com/article/10.1007/s12011-013-9863-9
  • Bankhead, Charles. "Fish Oil No Help for Secondary CVD Prevention." MedPage Today. April 9, 2012. (May 31, 2014) http://www.medpagetoday.com/Cardiology/Prevention/32100
  • Benaroch, Roy. "Vitamin C for the Common Cold." WebMD. June 20, 2012. (May 31, 2014) http://www.webmd.com/cold-and-flu/cold-guide/vitamin-c-for-common-cold
  • Cartwright, Martina M. "The 'Cold' Facts About Zinc." Huffington Post. Dec. 12, 2012. (May 31, 2014) http://www.huffingtonpost.com/martina-m-cartwright/colds-zinc_b_2219093.html
  • Cleveland Clinic. "Garlic Supplement Review." (May 31, 2014) http://www.clevelandclinicwellness.com/Features/Pages/Garlic.aspx
  • Cleveland Clinic. "Zinc." (May 31, 2014) http://www.clevelandclinicwellness.com/Features/Pages/Zinc.aspx
  • Douglas, Robert M; and Harri Hemila. "Vitamin C for Preventing and Treating the Common Cold." PLOS Medicine. Vol. 2, no. 6. June 28, 2005. (May 31, 2014) http://www.plosmedicine.org/article/info:doi/10.1371/journal.pmed.0020168
  • Eating Well. "Immune-Boosting Myths Busted." (May 31, 2014) http://www.eatingwell.com/nutrition_health/healthy_immunity_center/immune_boosting_myths_busted?page=2
  • Ehrlich, Steven D. "Chromium." University of Maryland Medical Center. May 7, 2013. (May 31, 2014) https://umm.edu/health/medical/altmed/supplement/chromium
  • Fantar, Suzanne. "Does Chewing Garlic Help a Cold?" SFGate.com. (May 31, 2014) http://healthyeating.sfgate.com/chewing-garlic-cold-9127.html
  • Fetters, K. Aleisha. "Health myth: Do you really need to take a multivitamin?" Fox News. Feb. 20, 2014. (May 31, 2014) http://www.foxnews.com/health/2014/02/20/health-myth-do-really-need-to-take-multivitamin/
  • Fiala, Thomas. "DHEA: Super Supplement Or Snake Oil?" FIALA Aesthetics. April 3, 2009. (May 31, 2014) http://www.plasticsurgeryinflorida.com/blog/posts/dhea-super-supplement-or-snake-oil.html#.U4d7v_ldVbw
  • Gann, Carrie. "Fish Oil Delivers Few Heart Benefits, Study Finds." ABC News Medical Unit. April 9, 2012. (May 31, 2014) http://abcnews.go.com/Health/fish-oil-delivers-heart-benefits-study/story?id=16103420#.T4NY6c3HjoV
  • Guallar, Eliseo; Stranges, Saverio; Mulrow, Cynthia; Appel, Lawrence; and Edgar Miller III. "Enough is Enough: Stop Wasting Money on Vitamin and Mineral Supplements." Annals of Internal Medicine. Col. 159, no. 12. Dec. 17, 2013. (May 31, 2014) http://annals.org/article.aspx?articleid=1789253
  • Kiefer, David. "Weight Loss & Diet Plans - DHEA Supplements." WebMD. Sept. 26, 2012. (May 31, 2014) http://www.webmd.com/diet/dhea-supplements
  • Kluber, Amy. "Are fish oil benefits a myth?" WPXI News. March 18,2 014. (May 31, 2014) http://www.wpxi.com/news/news/national/are-fish-oil-benefits-myth/nfF5g/
  • Landman, Gijs; Bilo, Henk; Houweling, Sebastiaan; and Nanne Kleefstra. "Chromium does not belong in the diabetes treatment arsenal: Current evidence and future perspectives." World Journal of Diabetes. Vol. 5, no. 2. Pages 160-164. April 15, 2014. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3990317/
  • Lev-Tzion, R; Griffiths, A; Ledder, O; and D Turner. "Omega 3 fatty acids (fish oil) for maintenance of remission in Crohn's disease." Cochrane Summaries. Feb. 28, 2014. (May 31, 2014) http://summaries.cochrane.org/CD006320/omega-3-fatty-acids-fish-oil-for-maintenance-of-remission-in-crohns-disease#sthash.Ss8MFr5X.dpuf
  • LeWine, Howard. "Fish oil: friend or foe?" Harvard Health Blog - Harvard Medical School. July 12, 2013. (May 31, 2014) http://www.health.harvard.edu/blog/fish-oil-friend-or-foe-201307126467
  • Lissiman, Elizabeth; Bhasale, Alice L.; and Marc Cohen. "Garlic for the common cold." The Cochraine Library. March 14,2 012. (May 31, 2014) http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD006206.pub3/abstract;jsessionid=07E19CA979CCB470559A33C4BC3F168A.f04t04
  • Macknin, Michael L. "Zinc lozenges for the common cold." Cleveland Clinic Journal of Medicine. Vol. 66, no. 1. Pages 27-31. January 1999. (May 31, 2014) http://www.ccjm.org/content/66/1/27.full.pdf
  • Mahoney, Sarah. "Do Women Really Need Multivitamins?" Prevention. November 2011. (May 31, 2014) http://www.prevention.com/mind-body/natural-remedies/do-women-really-need-multivitamins
  • Mayo Clinic. "Vitamin D." Nov. 1, 2013. (May 31, 2014) http://www.mayoclinic.org/drugs-supplements/vitamin-d/evidence/hrb-20060400
  • Morrison, Deane. "Hold the supplements." University of Minnesota. Nov. 30, 2011. (May 31, 2014) http://www1.umn.edu/news/features/2011/UR_CONTENT_363761.html
  • Mursu, Jaakko; Robien, Kim; Harnack, Lisa; Park, Kyong; and David R. Jacobs. "Dietary Supplements and Mortality Rate in Older Women: The Iowa Women's Health Study" JAMA Internal Medicine. Oct. 10, 2011. (May 31, 2014) http://archinte.jamanetwork.com/article.aspx?articleid=1105975
  • Nair, KS; Rizza, RA; O'Brien, P; Dhatariya, K; Short, KR; Nehra, A; Vittone, JL; Klee, GG; Basu, A; Cobelli, C; Toffolo, G; Dalla Man, C; Tindall DJ; Melton, LJ 3rd; Smith, GE; Khosla, S; and MD Jensen. "DHEA in elderly women and DHEA or testosterone in elderly men." New England Journal of Medicine. Vol. 355, no. 16. Pages 1647-1659. Oct. 19, 2006. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pubmed/17050889
  • National Institutes of Health - MedlinePlus. "Vitamin D." May 17, 2012. (May 31, 2014) http://www.nlm.nih.gov/medlineplus/druginfo/natural/929.html
  • National Institutes of Health - National Diabetes Education Program (NDEP). "The Facts About Diabetes: A Leading Cause of Death in the U.S." (May 31, 2014) http://ndep.nih.gov/diabetes-facts/
  • National Institutes of Health - Office of Dietary Supplements. "Chromium." Nov. 4, 2013. (May 31, 2014) http://ods.od.nih.gov/factsheets/Chromium-HealthProfessional/
  • National Institutes of Health - Office of Dietary Supplements. "Vitamin C." June 5, 2013. (May 31, 2014) http://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
  • Nordqvist, Christian. "What is Echinacea? What Are The Benefits Of Echinacea." Medical News Today. Nov. 13, 2012. (May 31, 2014) http://www.medicalnewstoday.com/articles/252684.php
  • Offit, Paul. "The Vitamin Myth: Why We Think We Need Supplements." The Atlantic. July 19, 2013. (May 31, 2014) http://www.theatlantic.com/health/archive/2013/07/the-vitamin-myth-why-we-think-we-need-supplements/277947/
  • Paddock, Catherine. "Echinacea Helps You Avoid And Recover From Colds Say Scientists." Medical News Today. June 25, 2007. (May 31, 2014) http://www.medicalnewstoday.com/articles/75225.php
  • Paddock, Catherine. "Echinacea No Big Impact On Common Cold." Medical News Today. Dec. 21, 2010. (May 31, 2014) http://www.medicalnewstoday.com/articles/212112.php
  • Park, Alice. "Fish Oil for Heart Attack Prevention: Is It a Myth?" Time. April 10, 2012. (May 31, 2014) http://healthland.time.com/2012/04/10/fish-oil-for-heart-attack-prevention-is-it-a-myth/
  • Parramore, Lynne Stuart. "Are vitamins a scam?" Salon. June 25, 2013. (May 31, 2014) http://www.salon.com/2013/06/25/are_vitamins_a_billion_dollar_scam_partner/
  • Pittas, AG; Chung, M; Trikalinos, T; Mitri, J; Brendel, M; Patel, K; Lichtenstein, AH; Lau, J; and EM Balk. "Systematic review: Vitamin D and cardiometabolic outcomes." Annals of Internal Medicine. Vol. 152, no. 5. Pages 307-314. March 2, 2010. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pubmed/20194237
  • Prasad, AS; Beck, FW; Bao, B; Snell, D; and JT Fitzgerald. "Duration and severity of symptoms and levels of plasma interleukin-1 receptor antagonist, soluble tumor necrosis factor receptor, and adhesion molecules in patients with common cold treated with zinc acetate." The Journal of Infectious Diseases. Vol. 197, no. 6. Pages 795-802. March 25, 2008. (May 31, 2014) http://jid.oxfordjournals.org/content/197/6/795.full
  • Ried, K; Frank, OR; Stocks, NP; Fakler, P; and T Sullivan. "Effect of garlic on blood pressure: a systematic review and meta-analysis." BMC Cardiovascular Disorders. Vol. 8, no. 13. June 16, 2008. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pubmed/18554422
  • Reinberg, Steven. "Why Do Millions of Americans Take Multivitamins?" WebMD. (May 31, 2014) http://www.webmd.com/vitamins-and-supplements/news/20130204/with-benefits-unproven-why-do-millions-of-americans-take-multivitamins
  • Risk and Prevention Study Collaborative Group. "n-3 Fatty Acids in Patients with Multiple Cardiovascular Risk Factors." The New England Journal of Medicine. Vol. 368. Pages 1800-1808. May 9, 2013. (May 31, 2014) http://www.nejm.org/doi/full/10.1056/NEJMoa1205409
  • Sample, Ian. "Cold comfort: vitamin C myth exposed." The Guardian. July 18, 2007. (May 31, 2014) http://www.theguardian.com/science/2007/jul/18/medicineandhealth.sciencenews
  • Schmidt, PJ; Daly, RC; Bloch, M; Smith, MJ; Danaceau, MA; St. Clair, LS; Murphy, JH; Hag, N; and DR Rubinow. "Dehydroepiandrosterone monotherapy in midlife-onset major and minor depression." Archives of General Psychiatry. Vol. 62, no. 2. Pages 154-162. February 2005. (May 31, 2014) http://www.ncbi.nlm.nih.gov/pubmed/15699292
  • Scott, Paula Spencer. "Colds and Flu: Myths vs. Facts." Arthritis Foundation. (May 31, 2014) http://www.arthritistoday.org/about-arthritis/arthritis-and-your-health/health-habits/cold-and-flu-myths.php
  • Suksomboon, N.; Poolsup, N.; and A. Yuwanakorn. "Systematic review and meta-analysis of the efficacy and safety of chromium supplementation in diabetes.." Journal of Clinical Pharmacy and Therapeutics. Vol. 39, no. 3. Pages 292-306. March 17, 2014. (May 31, 2014) http://onlinelibrary.wiley.com/doi/10.1111/jcpt.12147/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false
  • University of Maryland Medical Center. "Echinacea." May 7, 2013.(May 31, 2014) http://umm.edu/health/medical/altmed/herb/echinacea
  • Walsh, Trainor. "Annual CRN Consumer Survey Finds Overall Use of Supplements on the Rise." Concil for responsible Nutrition. March 13, 2012. (May 31, 2014) http://www.crnusa.org/CRNPR12-SurveyFindingsUsage031312.html
  • WebMD. "Echinacea." (May 31, 2014) http://www.webmd.com/vitamins-supplements/ingredientmono-981-ECHINACEA.aspx?activeIngredientId=981&activeIngredientName=ECHINACEA
  • WebMD. "Natural Medicines Comprehensive Database: Yohimbe." (May 31, 2014) http://www.webmd.com/vitamins-supplements/ingredientmono-759-YOHIMBE.aspx?activeIngredientId=759&activeIngredientName=YOHIMBE
  • Weiss, Jean. "Vitamin Myths, Truths and Tips." MSN Health & Fitness. (May 31, 2014) http://healthyliving.msn.com/health-wellness/vitamin-myths-truths-and-tips-1


The Case for and Against Taking Fish Oil Pills

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