If you are getting these palpitations from just B12, then you know it from the B12 only
Although theres no difference in how well either of these forms is absorbed, using the Methylcobalamin version can lead to 13 percent greater storage of B12 in the liver
Fatigue often improves within a couple of days after the injection
These can include rapid heartbeat, chest pain, confusion, muscle cramps and weakness, hives, skin rashes, and difficulty breathing or swallowing [1]
The weight loss it produces, while clinically significant, comes almost entirely from reduced caloric intake rather than from metabolic changes that increase how many calories the body burns at rest