Consumption of aspartame-containing beverages and incidence of hematopoietic and brain malignancies.
BACKGROUND
In a few animal experiments, aspartame has been linked to hematopoietic and brain cancers. Most animal studies have found no increase in the risk of these or other cancers. Data on humans are sparse for either cancer. Concern lingers regarding this widely used artificial sweetener.


OBJECTIVE
We investigated prospectively whether aspartame consumption is associated with the risk of hematopoietic cancers or gliomas (malignant brain cancer).


METHODS
We examined 285,079 men and 188,905 women ages 50 to 71 years in the NIH-AARP Diet and Health Study cohort. Daily aspartame intake was derived from responses to a baseline self-administered food frequency questionnaire that queried consumption of four aspartame-containing beverages (soda, fruit drinks, sweetened iced tea, and aspartame added to hot coffee and tea) during the past year. Histologically confirmed incident cancers were identified from eight state cancer registries. Multivariable-adjusted relative risks (RR) and 95% confidence intervals (CI) were estimated using Cox proportional hazards regression that adjusted for age, sex, ethnicity, body mass index, and history of diabetes.


RESULTS
During over 5 years of follow-up (1995-2000), 1,888 hematopoietic cancers and 315 malignant gliomas were ascertained. Higher levels of aspartame intake were not associated with the risk of overall hematopoietic cancer (RR for >/=600 mg/d, 0.98; 95% CI, 0.76-1.27), glioma (RR for >/=400 mg/d, 0.73; 95% CI, 0.46-1.15; P for inverse linear trend = 0.05), or their subtypes in men and women.


CONCLUSIONS
Our findings do not support the hypothesis that aspartame increases hematopoietic or brain cancer risk.
Lim
Unhee
U
Division of Cancer Control and Population Sciences, National Cancer Institute, 6130 Executive Boulevard, EPN 4005, Rockville, MD 20852-7344, USA.
Subar
Amy F
AF
Mouw
Traci
T
Hartge
Patricia
P
Morton
Lindsay M
LM
Stolzenberg-Solomon
Rachael
R
Campbell
David
D
Hollenbeck
Albert R
AR
Schatzkin
Arthur
A
D000368:Aged; D001218:Aspartame / Q000009:adverse effects*; D001628:Beverages / Q000009:adverse effects*; D001932:Brain Neoplasms / Q000139:chemically induced* / Q000453:epidemiology; D005260:Female; D019337:Hematologic Neoplasms / Q000139:chemically induced* / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
D001218:Aspartame