how do i know if b12 injections are working Best Vitamin Injection Sites B12 INJECTIONS - The Nurse

Once a dog has begun taking a vitamin B12 supplement, small improvements may be seen in just a few days, but it can take several weeks before the dog fully responds to treatment.

Vitamin B12 deficiency causes tiredness, weakness, constipation, loss of appetite, weight loss, and megaloblastic anemia

Because it works at the cellular level restoring NAD+ so fat cells become metabolically active again changes tend to be gradual and build over weeks, and they show up best alongside solid nutrition, training, and the rest of your plan

If you are having B12 injections for a genuine deficiency, this is the context that helps you tell a settling-in reaction from a real problem