Increasing Vegetable Intake Using Monosodium Glutamate in a Randomized Controlled Trial: A Culinary Medicine...

Area of Science:

• Nutrition Science
• Food Science
• Public Health

Background:

• Dietary guidelines emphasize increased vegetable consumption for health.
• Flavor enhancement is a potential strategy to improve vegetable intake.
• Culinary medicine programs integrate nutrition education with cooking skills.

Purpose of the Study:

• To evaluate monosodium glutamate (MSG) as a flavor enhancer for increasing vegetable intake.
• To compare MSG with sodium chloride (NaCl) in a randomized controlled trial (RCT).
• To assess the impact of a digital culinary medicine education program on vegetable consumption.

Main Methods:

• A two-phase RCT involving 60-88 participants over nine months.
• Participants were assigned to groups using 100% NaCl, 50/50 NaCl/MSG, or 70/30 NaCl/MSG seasonings.
• Vegetable intake was logged via MyFitnessPal; palatability was assessed using Likert scales and triangle tests.

Main Results:

• The 50/50 NaCl/MSG group showed a slight increase in vegetable intake (1.46 to 1.55 cups/day), while the NaCl group decreased (1.33 to 0.95 cups/day).
• Preference tests favored MSG-seasoned vegetables, particularly green beans with the 50/50 mixture (p=0.07).
• Differences in vegetable intake were not statistically significant (p=0.46).

Conclusions:

• Monosodium glutamate (MSG) shows potential for enhancing vegetable palatability and intake.
• Combining MSG with culinary medicine education may be a viable strategy for dietary improvement.
• Further research is necessary to confirm the efficacy of MSG in increasing vegetable consumption.