Monosodium glutamate (MSG) intake is associated with the prevalence of metabolic syndrome in a rural Thai population.
BACKGROUND
Epidemiology and animal models suggest that dietary monosodium glutamate (MSG) may contribute to the onset of obesity and the metabolic syndrome.


METHODS
Families (n = 324) from a rural area of Thailand were selected and provided MSG as the sole source for the use in meal preparation for 10 days. Three hundred forty-nine subjects aged 35-55 years completed the study and were evaluated for energy and nutrient intake, physical activity, and tobacco smoking. The prevalence of overweight and obesity (BMI ≥ 25 kg/m2), insulin resistance (HOMA-IR >3), and the metabolic syndrome (ATP III criteria) were evaluated according to the daily MSG intake.


RESULTS
The prevalence of the metabolic syndrome was significantly higher in the tertile with the highest MSG intake. Further, every 1 g increase in MSG intake significantly increased the risk of having the metabolic syndrome (odds ratio 1.14, 95% confidence interval-CI- 1.12 - 1.28) or being overweight (odds ratio 1.16, 95% CI 1.04 - 1.29), independent of the total energy intake and the level of physical activity.


CONCLUSIONS
Higher amounts of individual MSG consumption are associated with the risk of having the metabolic syndrome and being overweight independent of other major determinants.
Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand. ubocha@kku.ac.th.
Tonkla
T
Insawang
Carlo
C
Selmi
Ubon
U
Cha'on
Supattra
S
Pethlert
Puangrat
P
Yongvanit
Premjai
P
Areejitranusorn
Patcharee
P
Boonsiri
Tueanjit
T
Khampitak
Roongpet
R
Tangrassameeprasert
Chadamas
C
Pinitsoontorn
Vitoon
V
Prasongwattana
M Eric
ME
Gershwin
Bruce D
BD
Hammock