[1] In moderate deficiencies, feeling tired, feeling faint, mouth ulcers, rapid breathing, upset stomach, pallor, hair loss, decreased ability to think and joint pain and the beginning of neurological symptoms, including abnormal sensations such as, numbness and tingling, and tinnitus may occur
Much of the research framing treats it as an orally administered compound, and in practitioner circles it circulates in oral/sublingual forms (capsules, or the reconstituted solution taken sublingually)
Metabolism Support and Weight Management Vitamin injections can also support metabolism and weight loss efforts
Similarly, older adults, those with digestive disorders like Crohns disease or celiac disease, and individuals whove undergone weight-loss surgery may struggle with the bodys ability to absorb B12 from food