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

Dried plum antigen marker

Prune refers to dried plum (Prunus domestica) as a food antigen whose proteins and fruit compounds can interact with the immune system. Measuring prune-specific IgA and IgG provides insight into whether exposure is linked to mucosal or systemic immune activity, helping reveal food-related response patterns within the Food Zoomer.

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Prune

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About Prune

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About Prune

Overview and History

Prunes are dried plums from the species Prunus domestica; as a biomarker they are represented by whole-food extracts and specific fruit proteins. Biochemically prunes contain dietary fiber, sorbitol, polyphenols, and distinct protein fragments that can act as antigens or cross-react with related stone fruits in the Rosaceae family. Historically consumed for nutritional and digestive effects, prunes are included in immune-reactivity studies because their complex mix of carbohydrates, phenolics, and proteins can influence gut function and immune recognition. Peptide-level testing can reveal whether reactivity targets intact proteins or smaller fragments, which refines interpretation in the context of other food group responses.

Interpreting Highs and Lows

Elevated prune-specific IgA suggests mucosal immune recognition at the gut lining, while elevated prune-specific IgG points to systemic immune exposure; either elevation may associate with patterns of food-related symptoms when seen alongside other reactive foods. Low or absent prune antibodies generally indicate immune tolerance or limited recent exposure to prune proteins, but neither elevated nor low levels alone confirm cause-and-effect. Interpretation is most informative when integrated with the full Food Zoomer profile, clinical history, and symptom patterns.

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Prune is included in the Food Zoomer to assess immune responses to a commonly eaten dried fruit using both IgA and IgG and, where applicable, peptide-specific markers. This helps detect clustered reactivity among fruits or related food groups, supports clearer pattern recognition, and informs personalized dietary decisions based on immune-response data.

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Prune FAQs

What is Prune and why is it important?

Prune is the dried form of plum (Prunus domestica) and is tested as a food antigen made up of proteins and fruit compounds. The biomarker shows whether the immune system is recognizing prune components at the gut surface or systemically. That information helps map food-immune relationships and how prune exposure fits into broader dietary patterns.

What does it mean if my Prune levels are low?

Low prune antibody levels typically indicate limited immune recognition of prune proteins, which can reflect tolerance or little recent exposure. Low levels do not rule out non-immune effects from prunes (like sorbitol-related digestive responses). High levels, by contrast, suggest immune contact with prune antigens; both findings are best interpreted alongside the full Food Zoomer panel and clinical context.

What does it mean if my Prune levels are high?

Elevated prune-specific IgA or IgG suggests the immune system has mounted a measurable response to prune proteins or extracts. This may be associated with patterns of food-related symptoms when observed with other reactive foods, but elevated levels require interpretation within the complete test report and clinical history to define relevance.

Why is this biomarker included in the Food Zoomer?

Including prune allows providers to evaluate immune responses to a commonly consumed dried fruit and to detect clustering of reactivity across fruit or related food families. Measuring prune-specific antibodies contributes to pattern-based interpretation, helping prioritize which foods to consider when tailoring nutrition strategies and substitution plans.

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