What to watch with IgG and Schlaf?

There is no robust scientific evidence that IgG antibodies to foods directly impact sleep. IgG tests are often marketed as food sensitivity tests, but they are controversial in the medical community—they frequently reflect normal immune exposure rather than true intolerance. Sleep issues can stem from many factors: stress, hormonal changes, poor sleep hygiene, micronutrient deficiencies, or underlying conditions. An IgG test is not a standard diagnostic tool for sleep problems. Anyone experiencing persistent sleep disturbances should seek medical evaluation before investing in expensive lab tests. The evidence base here is unclear.