Cancer risk and consumption of arificial sweeteners especially saccharin, aspartame
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There has been an ongoing controversy over the health risks especially cancer risks due to consumption of artificial non-nutritive sweeteners like saccharin and aspartame. Most of the data about cancer risk has been based on animal studies. Question arises: What is the human data on cancer risk due to artificial sweeteners due to saccharin and/or aspartame.
Gallus and colleagues from Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy.provided an analysis of the integrated network of case-control studies between 1991 and 2004 in Italy on variety of cancers. The findings were published in the journal Annals of Oncology. The odds ratios for saccharin use and cancer risk are as follows:
- Oropharynx 0.83 (95% CI 0.30-2.29)
- Esophagus 1.58 (95% CI 0.59-4.25)
- Colon 0.95 (95% CI 0.67-1.35)
- Rectum 0.93 (95% CI 0.60-1.45)
- Larynx 1.55 (95% CI 0.76-3.16)
- Breast 1.01 (95% CI 0.77-1.33)
- Ovaries 0.46 (95% CI 0.29-0.74) --------------Reduced risk
- Prostate 0.91 (95% CI 0.59-1.40)
- Kidneys 0.79 (95% CI 0.49-1.28)
- Oral cavity and pharynx 0.77 (95% CI 0.39-1.53)
- Esophagus 0.77 (95% CI 0.34-1.75)
- Colon cancer 0.90 (95% CI 0.70-1.16)
- Rectum 0.71 (95% CI 0.50-1.02)
- Larynx 1.62 (95% CI 0.84-3.14)
- Breast cancer 0.80 (95% CI 0.65-0.97) --------Reduced risk
- Ovaries 0.75 (95% CI 0.56-1.00)
- Prostate 1.23 (95% CI 0.86-1.76)
- Kidneys 1.03 (95% CI 0.73-1.46)
In fact there was a significant less likelihood with use of total sweeteners and the risk for breast and ovarian cancer. On the other hand, there was a significant trend for total sweetener consumption and for laryngeal cancer.
Conclusion of the study: The authors concluded that there is a lack of association between saccharin, aspartame and other sweeteners and the risk of several common neoplasms.
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Update of above analysis for more cancers and sweetener risk: Bosetti and colleagues examined the role of sweeteners on cancer risk especially saccharin and other artificial or low-calorie sweeteners including aspartame. They conducted an update of their analysis of an integrated network of case-control studies conducted in Italy between 1991 and 2004 including data on cancers of the stomach, pancreas, and endometrium. The findings were published in the journal Cancer Epidemio Biomarkers Prev (2009).
The investigators found that after adjusting for confounding factors, odds ratios (indicating less or more risk; if you just want conclusions, just scroll down) ever users of sweeteners versus nonusers were as follows:
- Gastric cancer 0.80 (95% CI, 0.45-1.43)
- Pancreatic cancer 0.62 (95% CI, 0.37-1.04)
- Endometrial cancer 0.96 (95% CI, 0.67-1.40)
Conclusions of the updated cancer risk study: The authors concluded that the findings lent further support to the evidence on the absence of an adverse effect of low-calorie sweetener (including aspartame) consumption on the risk of common cancers in the Italian population.
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