Is IgG Unverträglichkeitstest useful for Schlaf?

The usefulness of an IgG intolerance test for sleep issues is not supported by scientific evidence. IgG food sensitivity tests are often marketed directly to consumers, but they lack clinical validation. The presence of IgG antibodies typically indicates normal immune exposure to foods, not an intolerance or allergy. No robust studies show that eliminating foods based on IgG results improves sleep. Sleep problems have many causes—stress, poor sleep hygiene, circadian disruption, or underlying medical conditions—and should be evaluated by a healthcare professional. Relying on an IgG test can lead to unnecessary dietary restrictions and distract from evidence-based interventions. The evidence level is 'marketing/unclear'. For better sleep, focus on proven strategies: consistent sleep schedule, limited screen time before bed, and consulting a doctor if issues persist.