Pseudoscience and bad science in biomedicine: Analysis of evidence, health risks, and media dissemination


Pseudoscience (false science) and science based on faulty and biased studies (bad science) produce false or uncertain knowledge, with poor or no evidence. Both represent a health risk: pseudoscience-based therapies because they can replace or delay conventional treatments, and low-quality biomedicine because it promotes medical interventions that can be dangerous. In the press, alternative therapies are less prevalent than low-quality research, while the former tends to be framed negatively and the latter favourably. Both require more thorough and rigorous studies to better understand their negative effects on critical thinking, economics, and health-related decision making.


pseudoscience; bad science; biomedicine; complementary and alternative medicine; scientific communication

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  • Angell, M., & Kassirer, J. P. (1998). Alternative medicine: The risks of untested and unregulated remedies. The New England Journal of Medicine, 339(12), 839–841. doi: 10.1056/NEJM199809173391210

  • Baker, M. (2016). 1,500 scientists lift the lid on reproducibility. Nature, 533(7604), 452–454. doi: 10.1038/533452a

  • Bauer, M. (1998). The medicalization of science news: From the “rocket-scalpel” to the “gene-meteorite” complex. Social Science Information37(4), 731–751. doi: 10.1177/053901898037004009

  • BMJ Publishing Group Limited. (2017). What conclusions has Clinical Evidence drawn about what works, what doesn’t based on randomised controlled trial evidence? Retrieved on 4 September 2017 from

  • Camí, J., Méndez-Vásquez, R. I., & Suñén-Pinyol, E. (2008). Evolución de la productividad científica de España en biomedicina (1981-2006). Redes, 10, 24–29. Retrieved from

  • Chalmers, I., & Glasziou, P. (2009). Avoidable waste in the production and reporting of research evidence. The Lancet, 374(9683), 86–89. doi: 10.1016/S0140-6736(09)60329-9

  • Cortiñas-Rovira, S., Alonso-Marcos, F., Pont-Sorribes, C., & Escribà-Sales, E. (2015). Science journalists’ perceptions and attitudes to pseudoscience in Spain. Public Understanding of Science, 24(4), 450–465. doi: 10.1177/0963662514558991

  • Djulbegovic, B., & Hozo, I. (2007). When should potentially false research findings be considered acceptable? PLoS Medicine, 4(2), 0211–0217. doi: 10.1371/journal.pmed.0040026

  • Dumas-Mallet, E., Smith, A., Boraud, T., & Gonon, F. (2017). Poor replication validity of biomedical association studies reported by newspapers. PLoS ONE, 12(2), e0172650. doi: 10.1371/journal.pone.0172650

  • Escribà-Sales, E., Cortiñas Rovira, S., & Alonso-Marcos, F. (2015). La pseudociencia en los medios de comunicación: Estudio de caso del tratamiento de la homeopatía en la prensa española y británica durante el período 2009-2014. Panace@, 16(42), 177–183.

  • Goldacre, B. (2009). Bad science. London: Harper Perennial.

  • Gonon, F., Konsman, J. P., Cohen, D., & Boraud, T. (2012). Why most biomedical findings echoed by newspapers turn out to be false: The case of attention deficit hyperactivity disorder. PLoS ONE, 7(9), e44275. doi: 10.1371/journal.pone.0044275

  • Goodman, S., & Greenland, S. (2007). Why most published research findings are false: Problems in the analysis. PLoS Medicine, 4(4), e168. doi: 10.1371/journal.pmed.0040168

  • Guyatt, G. H., Oxman, A. D., Vist, G. E., Kunz, R., Falck-Ytter, Y., Alonso-Coello, P., & Schünemann, H. J. (2008). GRADE: An emerging consensus on rating quality of evidence and strength of recommendations. British Medical Journal, 9(1), 8–11. doi: 10.1136/bmj.39489.470347.AD

  • Haynes, R. B. (2005). Bmjupdates+, a new free service for evidence-based clinical practice. Evidence-Based Mental Health, 8(3), 62–63. doi: 10.1136/ebmh.8.3.62

  • Ioannidis, J. P. A. (2005). Why most published research findings are false. PLoS Medicine, 2(8), e124. doi: 10.1371/journal.pmed.0020124

  • Johnson, S. B., Park, H. S., Gross, C. P., & Yu, J. B. (2018). Use of alternative medicine for cancer and its impact on survival. Journal of the National Cancer Institute, 110(1), 1–4. Pre-published online. doi: 10.1093/jnci/djx145

  • Lai, W. Y. Y., & Lane, T. (2009). Characteristics of medical research news reported on front pages of newspapers. PLoS ONE, 4(7), e6103. doi: 10.1371/journal.pone.0006103

  • Mercurio, R., & Eliott, J. A. (2011). Trick or treat? Australian newspaper portrayal of complementary and alternative medicine for the treatment of cancer. Supportive Care in Cancer, 19(1), 67–80. doi: 10.1007/s00520-009-0790-4

  • Ministry of Health, Social Policy, and Equality. (2011). Análisis de situación de las terapias naturales. Madrid: MSPSI. Retrieved from

  • Moreno-Castro, C., & Lopera-Pareja, E. H. (2016, 26-28 April). Comparative study of the frequency of use of natural therapies among the Spanish population and their public image on digital media. 14th International Conference on Public Communication of Science and Technology (PCST), Estambul, Turquía. Retrieved from

  • Munafò, M. R., Nosek, B. A., Bishop, D. V. M., Button, K. S., Chambers, C. D., Percie du Sert, N., … Ioannidis, J. P. A. (2017). A manifesto for reproducible science. Nature Human Behaviour, 1(1), 21. doi: 10.1038/s41562-016-0021

  • Schoenfeld, J. D., & Ioannidis, J. P. A. (2013). Is everything we eat associated with cancer? A systematic cookbook review. The American Journal of Clinical Nutrition, 97(1), 127–134. doi: 10.3945/ajcn.112.047142

  • Sumner, P., Vivian-Griffiths, S., Boivin, J., Williams, A., Bott, L., Adams, R., … Chambers, C. D. (2016). Exaggerations and caveats in press releases and health-related science news. PLoS ONE, 11(12), e0168217. doi: 10.1371/journal.pone.0168217

  • Sumner, P., Vivian-Griffiths, S., Boivin, J., Williams, A., Venetis, C. A., Davies, A., … Chambers, C. D. (2014). The association between exaggeration in health related science news and academic press releases: Retrospective observational study. British Medical Journal (Clinical Research Edition), 349(dec09_7), g7015. doi: 10.1136/bmj.g7015

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