Can IgG help with stress?

The question of whether IgG (immunoglobulin G) can help with stress lacks solid scientific support. IgG is an antibody crucial for immune defense, and while stress can modulate immune function, there is no robust clinical evidence that IgG supplementation or IgG testing directly alleviates stress. Some consumer health companies market IgG as a 'stress marker' or 'immune support' based on weak observational associations, but these claims are not backed by randomized controlled trials. The evidence level is best described as 'unclear' or 'marketing'. For stress management, evidence-based approaches such as exercise, sleep optimization, mindfulness, and professional counseling are far more reliable. If you are considering IgG-related products, consult a healthcare provider and be aware that the purported benefits are not proven. Always separate marketing hype from scientific reality.