“Caffeine is a drug. It’s not a nutrient and it’s not a normal part of our diet. It doesn’t provide any nourishment”
AUT Professor of Nutrition Dr Elaine Rush, on the effects of caffeine on the human body.
“Coffee is a risk factor for the development of sustained hypertension [high blood pressure]”
Dr Lucio Mos, San Antonio Hospital, University of Padova, Italy, September 2014.
“People with heart disease, high blood pressure, anxiety or type II diabetes may want to quit or curb their caffeine intake. Consuming caffeine on a regular basis raises your blood pressure higher than it otherwise would be”
James Lane, Medical Psychologist, Duke University, USA.
“We studied the effects of CGAs [polyphenols naturally present in coffee], which are very rich in coffee … we found that … coffee had a tendency to increase weight gain, particularly in regards to visceral fat. There was also increasing insulin resistance (which can lead to diabetes) and glucose intolerance”
Kevin Croft, Professor, Western Australia, May 2013.
“I did an experiment on Sunday and I was the guinea pig. I had a very strong cup of coffee. It’s been over seven months since I had any coffee. After my drink, I felt the following: a cold sweat, racing heartbeat, clammy all over, could not focus on a single conversation very well, my mind was racing through many different things. I had a totally wired brain. After a few hours, I felt the comedown and was left feeling flat and hollow. To think at one stage of my life I used to drink three double espressos per day. On my off days, I used to get headaches. It took me a while to figure it out — it was a caffeine headache”
Shane, June 2012.
Why I recommend you give up the coffee: References
1. Steffen, M., et al., ‘The effect of coffee consumption on blood pressure and the development of hypertension: A systematic review and meta-analysis.’ Journal of Hypertension, 2012, 30:2245. Also see, Giggey, P.P., et al., ‘Greater coffee intake in men is associated with steeper age-related increases in blood pressure.’ American Journal of Hypertension, 2011, 24:310.
2. Mort, J.R., et al., ‘Timing of blood pressure measurement related to caffeine consumption.’ Annals of Pharmacotherapy, 2008, 41:105.
3. Zhang, Z., et al., ‘Habitual coffee consumption and risk of hypertension: A systematic review and meta-analysis of prospective observational studies.’ American Journal of Clinical Nutrition, 2011, 93:1212. Also see, O’Keefe, J., et al., ‘Effects of habitual coffee consumption on cardiometabolic disease, cardiovascular health, and all-cause mortality.’ Journal of the American College of Cardiology, 2013, 62:1043.
4. Jennifer Temple, PhD, and colleagues, ‘Cardiovascular responses to caffeine by gender and pubertal stage.’ University at Buffalo. Pediatrics, 2014, DOI:10.1542/peds.2013–3962. Also, Du, H., et al., ‘Fresh fruit consumption, blood pressure and cardiovascular disease risk: a prospective cohort study of 0.5 million adults in the China Kadoorie Biobank.’ Presented to the European Society of Cardiology, 2014.
5. Mos, L, et al., ‘Coffee consumption and risk of prediabetes in hypertension: results of the HARVEST study.’ European Society of Cardiology, 2014. Also, Schwandt, P., et al., ‘Body fat distribution and elevated blood pressure in 22051 youths: The PEP family heart study.’ Presented to the European Society of Cardiology, 2014.
6. Drici, M.D., et al., ‘Cardiac safety of so called “energy drinks”.’ Presented to the European Society of Cardiology, 2014.
7. Professor Kevin Croft, and colleagues, from the University of Western Australia and the Western Australian Institute for Medical Research. Research reported by The Press Trust, India, 26 May 2013.
8. Study by Eun Sun Jang, Sook-Hyang Jeong, Sung Ho Hwang, Hyun Young Kim, So Yeon Ahn, Jaebong Lee, Sang Hyub Lee, Young Soo Park, Jin Hyeok Hwang, Jin-Wook Kim, Nayoung Kim and Dong Ho Lee. Biomedical Central Gastroenterology, 2012, 12:145, DOI:10.1186/1471-230X-12-145, 18 October 2012.
10. Study by Morck, T.A., Lynch, S.R., and Cook, J.D., ‘Inhibition of food iron absorption by coffee.’ American Journal of Clinical Nutrition, 1983, 37:416–420.
11. Study by Solomons, N.W., and Cousins, R.J., ‘Inhibitors of zinc absorption (coffee) in N.W. Solomons and I.H. Rosenberg (eds), Absorption and Malabsorption of Mineral Nutrients, p. 161. Alan R. Liss, New York, 1984.
12. Study by researchers from UNC Chapel Hill, the Harvard School of Public Health and five other institutions. PLoS Genetics, 2011.
15. Study by Naren Gunja, a Medical Director and toxicologist at the New South Wales Poisons Information Centre, and Jared Brown, a senior poisons specialist, The Medical Journal of Australia, 2012.
16. New figures on 50,000 people to 113 different food types as released in April 2008 by the UK food intolerance tester YorkTest.
17. Study by Cabrera-Chavez, F., et al., ‘Maize Prolamins Resistant to Peptic-tryptic Digestion Maintain Immune-recognition by IgA from Some Celiac Disease Patients’ Plant Foods for Human Nutrition, 2012, 67(1): pp. 24–30. Also see, study by Vojdani, A., ‘Cross-Reaction between Gliadin and Different Food and Tissue Antigens.’ 2013, 4(1):20–32.
18. Nicolas Danchin, MD, of the University of Paris Rene Descartes. Study of 131,401 adults, as presented to the European Society of Cardiology, September 2014.
19. Study by M.P. Nantz, C.A. Rowe, J.F. Bukowski and S.S. Percival, researchers from the University of Florida, Brigham and Women’s Hospital and Harvard Medical School, and the Nutritional Science Research Institute, Boston, ‘Standardized capsule of Camellia sinensis lowers cardiovascular risk factors in a randomised, double-blind, placebo-controlled study.’ Nutrition, October 2008.
20. Study by Gang Liu, Xue-Nan Mi, Xin-Xin Zheng, Yan-Lu Xu, Jie Lu and Xiao-Hong Huang, ‘Effects of tea intake on blood pressure: a meta-analysis of randomised controlled trials.’ British Journal of Nutrition, October 2014, Vol. 112, Issue 07, pp. 1043–1054.
21. Study conducted by researchers from the Athens Medical School in Greece. European Journal of Cardiovascular Prevention, November 2008.
22. Study by N. Alexopoulos, C. Vlachopoulos, K. Aznaouridis, K. Baou, C. Vasiliadou, P. Pietri, P. Xaplanteris, E. Stefanadi and C. Stefanadis, ‘The acute effect of green tea consumption on endothelial function in healthy individuals.’ European Journal of Cardiovascular Prevention and Rehabilitation, 2008, Vol. 15, pp. 300–305.
23. Study on 69,000 Chinese women, followed for ten years, by lead author Sarah Nechuta, Ph.D., MPH, Assistant Professor of Medicine, and Senior Researcher Dr Wei Zheng, Head of Epidemiology, School of Medicine, Vanderbilt University, Nashville. American Journal of Clinical Nutrition, 1 November 2012.
24. Study by M.J. Shrubsole, W. Lu, Z. Chen, X.O. Shu, Y. Zheng, Q. Dai, Q. Cai, K. Gu, Z.X. Ruan, Y.-T. Gao and W. Zheng, ‘Drinking Green Tea Modestly Reduces Breast Cancer Risk.’ Journal of Nutrition, February 2009, Vol. 139, No. 2, pp. 310–316.
25. Study by Katherine D. Crew, Assistant Professor of Medicine and Epidemiology, Columbia University Medical Center, New York. Presented on 18 October 2012 to the 11th Annual International Conference on Frontiers in Cancer Prevention Research in Anaheim, California, hosted by the American Association for Cancer Research. See also, study by Susanne Henning, Adjunct Professor, David Geffen School of Medicine, University of California, Los Angeles Presented 18 October 2012 to the 11th Annual International Conference on Frontiers in Cancer Prevention Research in Anaheim, California.
26. Study ten-year findings from the huge Ohsaki National Health Insurance Cohort Study in Japan on 41,761 Japanese adults age 40–79, Cancer Causes and Control, September 2009.
27. Study by Dr Toru Naganuma, Tohoku University School of Medicine, Senda, and research colleagues in the Division of Epidemiology, Tohoku University’s Department of Public Health and Forensic Medicine, American Journal of Epidemiology, September 2009.
28. R. Ide, Y. Fujino, Y. Hoshiyama, T. Mizoue, T. Kubo, T.-M. Pham, K. Shirane, N. Tokui, K. Sakata, A. Tamakoshi and T. Yoshimura, ‘Prospective Study of Green Tea Consumption and Oral Cancer Incidence in Japan.’ Carcinogenesis, 2007. Also see, study by A.Y. Issa, S.R. Volate, S.J. Muga, D.Nitcheva, T. Smith and M.J. Wargovich, ‘Green tea selectively targets initial stages of intestinal carcinogenesis in the AOM-ApcMin mouse model.’ Cancer Epidemiology, Biomarkers & Prevention, DOI:10.1158/1055-9965.EPI-06-0830. Also see, study by H.H. Sherry Chow, Iman Hakim, Donna R. Vining, James Crowell, Margaret E. Tome, James Ranger-Moore, Catherine A. Cordova, Dalia M. Mikhael, Margaret M. Briehl and David S. Alberts, ‘Modulation of Human Glutathione S-Transferases by Polyphenon E Intervention.’ Annals of Epidemiology.
29. Study by Dr Kaijun Niu, and colleagues, Tohoku University Graduate School, investigated 1058 elderly men and women. American Journal of Clinical Nutrition, December 2009.
30. Study by I.C. Burckhardt, D. Gozal, E. Dayyat, Y. Cheng, R.C. Li, A.D. Goldbart and B.W. Row, ‘Green Tea Catechin Polyphenols Attenuate Behavioral and Oxidative Responses to Intermittent Hypoxia.’ American Journal of Respiratory and Critical Care Medicine, 2007, Vol. 177, pp. 1135–1141, DOI:10.1164/rccm.200701-110OC.
31. Mitoshi Kushiyama, Y. Shimazaki, M. Murakami and Y. Yamashita, ‘Relationship Between Intake of Green Tea and Periodontal Disease.’ Journal of Periodontology, 2009, Vol. 80, No. 3, Pages 372–377.
32. Study by Yamada, H., Takuma, N., Daimon, T. and Hara, Y., ‘Gargling with tea catechin extracts for the prevention of influenza infection in elderly nursing home residents: a prospective clinical study.’ Journal of Alternative & Complementary Medicine, September 2006, 12(7):669–72.
Jason wishes to deeply thank, acknowledge and recognise the effort and contribution that the PIF Foundation has provided on a voluntary basis since 2014, as we educated, motivated and inspired change that helps transform the health, vitality and longevity of people all over the world.