How are IgG and Schlaf related?

The relationship between IgG and sleep is not well-established in scientific literature. IgG antibodies are part of the adaptive immune system and are often measured in food sensitivity tests, but their direct impact on sleep is unclear. Some research suggests that chronic immune activation or inflammation can disrupt sleep via cytokines like IL-6 or TNF-α. However, IgG food sensitivity tests are controversial because elevated IgG levels often reflect normal immune exposure rather than clinical intolerance. Sleep disturbances are multifactorial; stress, cortisol, and the gut-brain axis are more relevant than isolated IgG levels. A MyBody-X IgG test alone cannot assess sleep quality. Evidence: mechanistic but weak for direct causation. Be cautious of marketing claims linking IgG to sleep problems.