I have witnessed this many times in my practice, and its usually, but not always, associated with hypothyroid, celiac disease, and elevated levels of intrinsic factor antibodies
Along with there being no reports of it causing birth defects, cancers or any other type of toxicity, Vitamin B12 doesnt even have an established tolerable upper intake level (UL), which is the amount that would cause an overdose or major unwanted side effects
Vitamin b12 injection for dogs enters the systemic circulation and shows quick effects after the administration
As vitamin B12 is mainly found in animal products, a deficiency is common among people following a vegan or vegetarian diet, individuals with malabsorption disorders, and older adults
What is the difference between Choquequirao and the Inca ruins of Machu Picchu