Long-term ingestion of monosodium L-glutamate did not induce obesity, dyslipidemia or insulin resistance: a two-generation study in mice.

Abstract

The use of monosodium glutamate (MSG) as a flavor enhancer spans more than 100 y and there are many studies indicating the safety of general use of MSG. Recently, however, Collison et al. (2010) reported a two-generation study with a low dose of MSG that caused abdominal obesity, insulin resistance and dyslipidemia in mice. Due to public health concerns over metabolic syndrome, their report merits careful analysis. The present study attempted to repeat the Collison et al. findings. Groups of male or female C57BL/6J mice were fed a control diet or one supplemented with high-fructose corn syrup (HFCS) at a level of 20%. Drinking water control was provided or treatment groups were given 0.064% MSG solution (w/v). Diets and MSG administration continued throughout mating and during gestation and lactation periods. To further investigate the effects of ingestion of MSG, the offspring were continued on the same dosing conditions until they reached 32 wk of age. MSG administration in mice fed a normal or a HFCS diet throughout gestation and for 32 wk after birth, did not affect growth, girth size, abdominal fat weight or body composition. This study reports that MSG did not trigger insulin resistance, dyslipidemia or hepatic steatosis, regardless of the diet, not reproducing the results of the above-mentioned study (Collison et al., 2010).

• Authors: Hidehiro Nakamura, Yasuko Kawamata, Tomomi Kuwahara, Miro Smriga, Ryosei Sakai
• Journal: Journal of nutritional science and vitaminology (J Nutr Sci Vitaminol (Tokyo)) Vol. 59 Issue 2 Pg. 129-35 ( 2013) ISSN: 1881-7742 [Electronic] Japan
• PMID: 23727643 (Publication Type: Journal Article)

Chemical References

• Adiponectin
• Blood Glucose
• Flavoring Agents
• Leptin
• Fructose
• Cholesterol
• Sodium Glutamate

Topics

• Abdominal Fat (drug effects, metabolism)
• Adiponectin (blood)
• Animal Nutritional Physiological Phenomena
• Animals
• Blood Glucose (analysis)
• Body Composition (drug effects)
• Body Weight (drug effects)
• Cholesterol (blood)
• Diet
• Dose-Response Relationship, Drug
• Dyslipidemias (chemically induced, metabolism)
• Fatty Liver (chemically induced, metabolism)
• Female
• Flavoring Agents (administration & dosage)
• Fructose (administration & dosage)
• Insulin Resistance
• Leptin (blood)
• Male
• Metabolic Syndrome (chemically induced, metabolism)
• Mice
• Mice, Inbred C57BL
• Obesity (chemically induced, metabolism)
• Sodium Glutamate (administration & dosage, adverse effects)