Glucose is a circulating sugar used for energy; insulin is a hormone that helps regulate glucose use and storage. They are related but not interchangeable concepts.
Why this matters when reading supplement marketing
Marketing can blur the line between supporting normal body functions and treating a diagnosed disease. FDA distinguishes structure/function claims from disease claims, and disease-treatment claims are not permitted for products marketed only as dietary supplements.
Keep measurements and treatment in context
Do not use a supplement article to diagnose yourself or change prescribed treatment. Use clinical measurements with guidance appropriate to your health situation.
Related: supplement evidence guide · supplement safety.