The link between IgG and weight loss (Abnehmen) is not supported by strong scientific evidence. IgG tests are often marketed as food sensitivity panels, with claims that eliminating 'reactive' foods can lead to weight loss. However, IgG antibodies primarily indicate prior exposure to food proteins, not intolerance or allergy. Most studies on IgG-guided elimination diets and weight change are small, uncontrolled, or industry-funded, and show no consistent benefit. The American Academy of Allergy, Asthma & Immunology and other bodies advise against using IgG tests for food sensitivity diagnosis. Relying on such tests may lead to unnecessary dietary restrictions, potential nutrient deficiencies, and no guaranteed weight loss. Sustainable weight management depends on energy balance, diet quality, and physical activity, not IgG levels. Consumers should be cautious of marketing hype and consult a healthcare professional for evidence-based weight loss strategies.
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