Objective: Anti-HBs antibodies are elicited upon hepatitis B vaccination. and concentrations above 10 mIU/mL are considered protective. Our aim was to assess the relationship between IU/mL of anti-HBs and neutralization activity. Methods: Immunoglobulins G (IgGs) were purified from individuals who received a serum-derived vaccine (Group 1). https://herbsdailyes.shop/product-category/pycnogenol/