What to watch with IgG and sleep?

The question about IgG and sleep touches on two areas: IgG food sensitivity tests (often marketed for intolerances) and sleep quality. Scientifically, evidence linking IgG levels to sleep is weak. IgG antibodies to foods typically indicate exposure and tolerance, not intolerance. While diet and inflammation can influence sleep, no robust studies show that IgG-guided diets improve sleep. Sleep disturbances are multifactorial (stress, light, caffeine, sleep hygiene). IgG tests are controversial and may lead to unnecessary dietary restrictions. A more evidence-based approach includes balanced nutrition, consistent sleep schedule, and stress reduction. Caveat: IgG testing for sleep or general health lacks clinical validation. Evidence grade: unclear.