Right now, I go in every six months prior to the injection because my calcium tends to run a bit low and it needs to be in a certain range to receive the injection.....it always manages to be okay though....my endocrinologist attempted to increase my dosage but I couldn’t manage it, so I continue with 800mg of calcium in supplement form and a daily serving of yogurt. Also, I take 2000 mg of vitamin d daily (I live in northern Minnesota so do not get much access to natural absorption of the sun. Take care and stay safe!