I have vitamin D deficiency. Yes, it is pretty low, much lower than even the disputed lows. I am no taking heavy doses of vitamin D for a while to catch up. To top it all off, I start with testosterone shots next week to boost up my low levels there. I asked the doc if could just beat up a few kids instead. No go. I hope these things can help get my weight loss going again. It’s so slow right now. Almost non existent.