A blood test that measures immunoglobulin levels can diagnose IgG deficiency. It’s possible to have a normal level of total IgG, so the testing of the IgG subclasses is important.

Jun 12, 2025 · For adults, the range of normal IgG levels is between 600 and 1600 mg/dL (milligrams per deciliter). These numbers can vary by lab and are lower in kids and babies.

May 1, 2024 · Deficiencies in IgG can have significant impacts on the immune system and health. What are normal IgG levels and do they vary by age? This article will discuss the normal IgG levels by age.

Aug 16, 2025 · Explore the significance of IgG levels for your immune health. Discover what typical ranges mean and how deviations can signal underlying conditions.

Aug 2, 2025 · When your body senses an invader, your IgM level will rise for a short time. It will then begin to drop as your IgG level kicks in and increases to protect you long-term.

People with low IgG levels often experience frequent or recurrent infections. These may involve the sinuses, ears, lungs, urinary tract, or other organs. Infections may be more severe, last longer than …

Oct 24, 2023 · IgG levels increase with age, with normal levels ranging from 700-1600 mg/dL in adults. Infants have lower levels. Learn what high and low levels mean.

Apr 11, 2025 · If you are suffering from a chronic disease, measuring IgG levels and comparing them with the normal range of serum immunoglobulin G levels by age can help you pick the best possible …

Jun 12, 2019 · It has a monomeric structure and consists of four sub-classes; IgG1, IgG2, IgG3 and IgG4. Selective deficiency of any of the IgG subclasses may occur but are easily missed as the …

IgG subclasses are specialized variations of the IgG antibody, each designed to perform distinct tasks in protecting the body from infections. The four subclasses—IgG1, IgG2, IgG3, and IgG4—work in …