Nutritional imbalances, including low B12 levels, are becoming increasingly common due to: Highly processed diets Use of acid-reducing medications Digestive disorders (like IBS or celiac disease) Vegetarian or vegan diets without proper supplementation In suburban communities like Troy, MI, where fast-paced lifestyles often limit dietary variety, its easy to overlook vitamin levels until symptoms appear
22,23 In patients with a normal or low-normal serum vitamin B 12 level, complete blood count results demonstrating macrocytosis, or suspected clinical manifestations, a serum methylmalonic acid level is an appropriate next step 1,2,6,18 and is a more direct measure of vitamin B 12 's physiologic activity
Journal of Endocrine Research, 78 (2), 145157
Repeated punctures with a contaminated needle introduce microbes that proliferate during storage, even at refrigerator temperature