What is Green onion / scallion and Why Does the Food Zoomer Test for It?

Allium-derived dietary antigen

Green onion (scallion) is a common Allium vegetable whose proteins, fibers, and sulfur-containing compounds interact with the digestive tract and immune system. Measuring IgA and IgG responses to green onion helps reveal whether the immune system recognizes components of this food, adding context to overall food-reactivity patterns.

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Green onion / scallion

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About Green onion / scallion

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About Green onion / scallion

Overview and History

Green onion, also called scallion, belongs to the Allium genus (related to onions, garlic, and leeks). Biochemically it contains plant proteins, fermentable carbohydrates (short-chain fructans), and sulfur-containing compounds that contribute flavor and biological activity. Historically used across cuisines and traditional remedies, green onion’s compounds serve plant defense roles and provide nutrients and fermentable substrates in the human diet. Certain proteins and carbohydrate structures can be antigenic, so measuring immune responses to green onion can be clinically relevant when evaluating food-related immune activity.

Interpreting Highs and Lows

Elevated IgA or IgG responses to green onion suggest immune recognition of one or more green onion components; IgA elevations point to mucosal (gut) engagement, while IgG elevations indicate systemic antibody presence. Low or absent antibody levels suggest little or no detectable immune response to green onion proteins at the time of testing. These findings are best interpreted alongside the full Food Zoomer panel, symptom history, timing of exposure, and potential cross-reactivity with related Allium foods.

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Green onion is included to evaluate immune responses to a commonly eaten Allium vegetable. The marker measures both IgA and IgG reactivity to green onion proteins and related compounds, helping identify whether reactivity clusters with other Allium or vegetable markers and informing personalized dietary interpretation within the broader Food Zoomer pattern.

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Green onion / scallion FAQs

What is Green onion / scallion and why is it important?

Green onion (scallion) is a popular vegetable in the Allium family used for flavor and nutrition. When eaten, its proteins and carbohydrates can sometimes be recognized by the immune system. Testing for antibodies to green onion helps show whether it is part of a broader pattern of food-related immune activity that may be relevant to symptoms.

What does it mean if my Green onion / scallion levels are low?

Low levels generally mean there are no detectable IgA or IgG antibodies to green onion, suggesting little or no immune recognition at the time of testing. In contrast, higher levels would suggest immune engagement. Any single result should be viewed with the full Food Zoomer panel and clinical context to understand its relevance.

What does it mean if my Green onion / scallion levels are high?

Elevated antibody levels indicate the immune system has recognized components of green onion. Elevated IgA may point to mucosal (gut) involvement while IgG reflects systemic antibody presence. Interpretation requires clinical context, symptom timing, and comparison with other food markers to assess whether this finding is part of a broader pattern.

Why is Green onion / scallion included in the Food Zoomer?

Including green onion helps detect immune reactivity to a commonly consumed Allium vegetable and reveals whether reactivity clusters with other foods or additives. Measuring both IgA and IgG supports distinction between mucosal and systemic responses and enhances pattern-based interpretation for personalized dietary assessment.

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