Ingredient · Updated

Monosodium Glutamate

Flagged in 15

Found in 15 productsSee all

What is Monosodium Glutamate?

Monosodium Glutamate, commonly known as MSG, is the sodium salt of glutamic acid, an amino acid found naturally in many foods. It is usually made by fermenting starches or sugars like sugar beet, cane, or molasses.

MSG is widely used as a flavor enhancer that brings a savory taste known as umami, commonly found in various processed foods, soups, and snack items. The chemical structure of MSG is the same whether it's in processed foods or naturally present in foods like tomatoes and cheese. Scientific evidence on MSG's health impact varies, with some studies linking it to symptoms like headaches in high doses, though it's generally recognized as safe for most people.

When you see MSG on a label, it's usually added to intensify flavors. For those sensitive to MSG, consuming it in large amounts can lead to mild symptoms like headaches or flushing, though such reactions are rare.

Commonly found in: snack foods, soups, seasonings, instant noodles, frozen meals, processed meats

What to watch

  • Some people report mild symptoms such as headaches or flushing after consuming large amounts of MSG.

Benefits

  • Enhances savory flavors, which can improve the palatability of foods.
FDA

MSG is classified as Generally Recognized As Safe (GRAS) by the FDA and does not require specific labeling beyond being listed as an ingredient.

Research

Research shows MSG can cause symptoms like headaches in sensitive individuals, but no conclusive evidence supports widespread adverse effects.

Vegan

MSG is vegan as it is derived from plant sources through fermentation and does not contain animal-derived ingredients.

Sources: Questions and Answers on Monosodium glutamate (MSG)

Scout's take

Monosodium glutamate (MSG) is a flavor enhancer that can cause adverse reactions in some individuals. It is often used in processed foods to enhance savory flavors. Some people report sensitivity to MSG, experiencing headaches or other symptoms.

The case against

May cause headaches, nausea, and other symptoms in sensitive individuals.

from the analysis of Herr's Cheddar & Sour Cream Ridged Potato Chips · echoed in 8 other analyses

May cause headaches or allergic reactions in sensitive individuals.

from the analysis of Samyang Buldak Original Potato Chips

The case for

Enhances umami flavor in foods but has no nutritional benefits.

from the analysis of Doritos Flamas Tortilla Chips · echoed in 2 other analyses

Enhances the savory flavor of foods, making them more palatable.

from the analysis of Corporacion Cressida YUMMIES, ZAMBOS, PLANTAIN CHIPS

Enhances savory flavors but provides no nutritional benefits.

from the analysis of Takis Rolled Blue Heat Tortilla Chips

More from Scout's analyses

Monosodium glutamate (MSG) is a flavor enhancer that can cause adverse reactions in sensitive individuals. It is a processed additive that may lead to symptoms like headaches or nausea in some people. Despite its widespread use, it remains controversial due to potential health concerns.

from the analysis of Frito-Lay Sunchips Mix Variety Pack

Monosodium glutamate (MSG) is used to enhance flavor but is controversial due to potential sensitivity in some individuals. It is a processed additive that can cause headaches or other symptoms in sensitive people. While generally recognized as safe, its use is debated.

from the analysis of Old El Paso Stand 'N Stuff Bold Nacho Cheese Flavored Taco Shells

Monosodium glutamate (MSG) is a flavor enhancer that can cause adverse reactions in sensitive individuals. It is often used in processed foods to enhance savory flavors. While generally recognized as safe, it is controversial due to potential sensitivity issues.

from the analysis of Lay's Stax Sour Cream & Onion Potato Chips

All 15 products with Monosodium Glutamate

Where Monosodium Glutamate shows up

Higher-scoring picks without Monosodium Glutamate

Products from the same categories whose analyzed ingredient list does not include Monosodium Glutamate, scoring 80 or above.

Scan any product to see every ingredient explained — and healthier swaps.