For others, especially those needing nerve or anemia support, improvements might take weeks or months with consistent injections
According to the NIH Office of Dietary Supplements, functional B12 deficiency is most commonly seen in patients with one or more of the following: Age over 50 stomach acid production declines with age, and stomach acid is required to free B12 from food PPI or H2 blocker use reflux medications suppress the acid needed for B12 absorption Metformin use, which interferes with B12 absorption directly Vegan or vegetarian diets B12 is found almost exclusively in animal products Gut conditions including celiac, IBS, SIBO, and Crohns MTHFR mutations that affect how B12 is metabolized once absorbed Heavy alcohol use The symptoms of low B12 are easy to dismiss: fatigue, brain fog, low mood, tingling in the hands or feet, weakness, and shortness of breath on mild exertion
Nervous system support B12 also plays a key role in the nervous system by helping maintain nerve signaling and protection
However, there are tiny links between vitamin B-12 injections and weight loss
Better Sleep Patterns Vitamin B12 plays a role in regulating melatonin, the hormone responsible for sleep cycles