Yes, blood alcohol content tests are commonly used to detect alcohol in the blood
Groups at higher risk of deficiency include older adults (due to reduced stomach acid production), people following vegan or strict vegetarian diets (as B12 is naturally found almost exclusively in animal products), individuals with pernicious anaemia or other malabsorption conditions, those taking certain medications such as metformin or proton pump inhibitors long-term, and people with significant nitrous oxide exposure (including recreational use), which can inactivate B12 in the body
Product Details Bacteriostatic Water for Injection (0.9% benzyl alcohol) is a sterile, nonpyrogenic preparation of water containing 0.9% benzyl alcohol as a bacteriostatic preservative
Journal of Inherited Metabolic Disease 16 (4): 762770
B12 deficiency can be caused by certain types of anemia, gastrointestinal conditions that affect absorption, or dietary restrictions such as strict vegetarian or vegan diets
You should also avoid any heavy exercise and excessive heat for 24 to 48 hours