What is Plum and Why Does the Food Zoomer Test for It?

Stone-fruit protein antigen

Plum measures immune antibody responses to proteins from plums and related stone fruits, tracked as IgA and IgG signals. Assessing these responses helps reveal whether exposure to stone-fruit proteins is part of broader mucosal or systemic immune patterns that can relate to digestion, skin, or energy changes.

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Plum

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About Plum

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About Plum

Overview and History

Plum refers to antibody reactivity against proteins found in plums and other Prunus species (stone fruits). Biochemically this covers fruit storage and structural proteins, including families like profilins and lipid-transfer proteins that are common across many fruits and can cross-react with related plants. In food immunology, monitoring antibodies to stone-fruit proteins has clinical relevance for mapping how the immune system recognizes dietary proteins. In plants these proteins support fruit integrity and seed development; in humans they may be targets of mucosal or systemic antibody formation that reflect prior exposure and immune memory.

Interpreting Highs and Lows

Elevated Plum antibody levels may indicate increased immune recognition of stone-fruit proteins, with higher IgA pointing toward mucosal (gut) activity and higher IgG suggesting broader systemic exposure. Low or absent Plum signals commonly reflect minimal recent exposure, immune tolerance, or that other food families are driving the immune pattern. Interpretation is most meaningful alongside the full Food Zoomer report—comparing IgA versus IgG, neighboring food domains, and symptom patterns helps clarify whether Plum is an isolated finding or part of a clustered response.

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Plum is included to evaluate immune responses to stone-fruit proteins and their potential cross-reactivity with related foods. Measuring Plum helps providers spot whether stone-fruit exposure contributes to clustered immune activity in the Food Zoomer report, informing targeted dietary planning and phased reintroduction strategies.

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Plum FAQs

What is Plum and why is it important?

Plum is a marker of antibody response to proteins from plums and other stone fruits. It helps show whether those fruit proteins are recognized by the immune system at the gut surface (IgA) or more broadly in the body (IgG). That information can help explain patterns linked to digestion, skin changes, or fluctuating energy after eating.

What does it mean if my Plum levels are low?

Low Plum levels usually mean little to no detectable antibody response to plum proteins, which can reflect limited recent intake, immune tolerance, or that other foods are more relevant to your immune profile. Low values are interpreted together with other panel results and symptom history to understand overall dietary immune balance.

What does it mean if my Plum levels are high?

High Plum levels suggest increased immune recognition of stone-fruit proteins; elevated IgA points toward mucosal response at the gut lining, while elevated IgG suggests broader systemic exposure. Determining whether this is clinically meaningful requires review of the full Food Zoomer pattern, symptom timing, and other food domain results.

Why is Plum measured on the Food Zoomer?

Plum helps identify whether stone-fruit proteins are part of an immune activity cluster within the full panel. Including this marker improves pattern detection across related foods, supports clearer elimination and reintroduction planning, and helps tailor nutrition strategies based on individual immune responses.

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