Diet Soda

As few as one diet soda daily may increase the risk for leukemia in men and women, and for multiple myeloma and non-Hodgkin lymphoma in men, according to new results from the longest-ever running study on aspartame as a carcinogen in humans. Importantly, this is the most comprehensive, long-term study ever completed on this topic, so it holds more weight than other past studies which appeared to show no risk.

Apart from sheer size, what makes this study superior to other past studies is the thoroughness with which aspartame intake was assessed. Every two years, participants were given a detailed dietary questionnaire, and their diets were reassessed every four years. Previous studies which found no link to cancer only ever assessed participants’ aspartame intake at one point in time, which could be a major weakness affecting their accuracy.

The combined results of this new study showed that just one 12-fl oz. can (355 ml) of diet soda daily leads to:

  • 42 percent higher leukemia risk in men and women (pooled analysis)
  • 102 percent higher multiple myeloma risk (in men only)
  • 31 percent higher non-Hodgkin lymphoma risk (in men only)

These results were based on multi-variable relative risk models, all in comparison to participants who drank no diet soda. It is unknown why only men drinking higher amounts of diet soda showed increased risk for multiple myeloma and non-Hodgkin lymphoma. Note that diet soda is the largest dietary source of aspartame (by far) in the U.S. Every year, Americans consume about 5,250 tons of aspartame in total, of which about 86 percent (4,500 tons) is found in diet sodas.

This raises a critical question: will future, high-quality studies uncover links to the other cancers in which aspartame has been implicated (brain, breast, prostate, etc.)?

There is now more reason than ever to completely avoid aspartame in our daily diet. For those who are tempted to go back to sugary sodas as a “healthy” alternative, this study had a surprise finding: men consuming one or more sugar-sweetened sodas daily saw a 66 percent increase in non-Hodgkin lymphoma (even worse than for diet soda). Perhaps the healthiest soda is no soda at all.

Source
http://www.ncbi.nlm.nih.gov/pubmed/23097267
http://www.ncbi.nlm.nih.gov/pubmed/16507461
http://www.ncbi.nlm.nih.gov/pubmed/17805418

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