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'Aspartame has been extremely controversial since its approval for use by several European countries in the 1980s. A 1996 report suggested a link between aspartame and an increase in the number of diagnosed brain tumours. However, the study had very little scientific basis and later studies showed that aspartame was in fact safe to consume.
The European Ramazzini Foundation of Oncology and Environmental Sciences has published several long-term studies (2006, 2007) linking the consumption of aspartame with an increase in cancers, namely lymphomas and leukaemias, in rats.
Following these studies, the US National Cancer Institute conducted a study of nearly half a million people, comparing those who consumed drinks containing aspartame with those who did not. Results of the 2006 study found that aspartame did not increase the risk of leukaemia, lymphoma or brain cancer.
Amid the continuing disquiet, the European Food Safety Authority (EFSA) conducted a comprehensive review of the evidence in 2013 and concluded that aspartame was safe for human consumption, including pregnant women and children.
In digestion, aspartame is quickly and completely broken down in to by-products – including phenylalanine, aspartic acid and methanol – which then enter our system through normal routes. Hardly any aspartame enters the bloodstream.