VITAMIN B1, ALSO KNOWN AS THIAMINE, IS A WATER-SOLUBLE VITAMIN ESSENTIAL FOR ENERGY PRODUCTION, NERVE FUNCTION, AND MUSCLE HEALTH. IT PLAYS A CRUCIAL ROLE IN CONVERTING CARBOHYDRATES INTO GLUCOSE, THE BODYS PRIMARY ENERGY SOURCE. THIAMINE DEFICIENCY CAN LEAD TO BERIBERI, A CONDITION CHARACTERIZED BY NEUROLOGICAL AND CARDIOVASCULAR SYMPTOMS. RICH FOOD SOURCES OF THIAMINE INCLUDE WHOLE GRAINS, LEGUMES, NUTS, SEEDS, AND MEAT.

A VITAMIN B12 TEST MEASURES THE AMOUNT OF VITAMIN B12 IN YOUR BLOOD. VITAMIN B12 IS ESSENTIAL FOR RED BLOOD CELL FORMATION, NERVE FUNCTION, AND DNA SYNTHESIS. THIS TEST HELPS DIAGNOSE VITAMIN B12 DEFICIENCY, WHICH CAN CAUSE ANEMIA, FATIGUE, WEAKNESS, AND NEUROLOGICAL SYMPTOMS. ITS OFTEN RECOMMENDED FOR PEOPLE WITH CERTAIN MEDICAL CONDITIONS, OLDER ADULTS, VEGANS, AND VEGETARIANS WHO MAY BE AT HIGHER RISK FOR DEFICIENCY.