No Known Effects: No serious side effects have been reported with the use of injectable vitamin B12 in animals
For this reason, B12 injections are often recommended as a preventive measure to help maintain cognitive health over time
7.2 mg is reserved for adults who tolerate 2.4 mg for at least four weeks and need additional weight reduction
You might have to take a B12 supplement or try a new medication
However, a noticeable effect on weight loss and fat burning will probably take several days to several weeks, depending on the metabolism, age, health, and lifestyle
Vitamin B12 deficiency has occurred in breast-fed infants of vegetarian mothers whose diets contain no animal products (e.g., eggs, dairy), even though the mothers had no symptoms of deficiency at the time