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Jaime Snarski is our Medical Director, who combines bariatric expertise with a passion for preventive health & personalized weight management

Vitamin B12 is a water-soluble vitamin essential to many key functions in the body

This method ensures maximum absorption and rapid correction of deficiency levels

Table of Contents How B12 Deficiency Can Affect HbA1c Test Results Why HbA1c May Be Unreliable in B12 Deficiency Who Is Most at Risk of Both B12 Deficiency and Diabetes UK Guidance on Interpreting HbA1c Alongside B12 Status When to Retest HbA1c After Treating B12 Deficiency Talking to Your GP About B12 and Blood Sugar Monitoring Frequently Asked Questions How B12 Deficiency Can Affect HbA1c Test Results B12 deficiency disrupts red blood cell maturation, producing fewer, larger cells with an altered lifespan that can make HbA1c results spuriously high or low