Discover how magnesium and vitamin D support immune function and energy in different ways. Learn which nutrient may matter more for immunity and energy.

The influenza virus or flu is a contagious respiratory illness that can generate mild, moderate, or severe symptoms. Healthy individuals that contract the virus may feel mild symptoms, but recover ...

Specific antibody deficiency (SAD) is an immune system disorder. It occurs when you have normal levels of antibodies but an insufficient immune response to certain types of bacteria. Antibodies, also ...

Immunoglobulin A (IgA) deficiency is the most common primary immunodeficiency in humans. It can increase the risk of allergies, asthma, and autoimmune disease. Primary immunodeficiencies are ...