Yes. Being a hermit and having lived in Scotland for a most of my life I had a chronic vitamin d deficiency. It took me years to get to optimal levels. I've und

Yes. Being a hermit and having lived in Scotland for a most of my life I had a chronic vitamin d deficiency. It took me years to get to optimal levels. I've underwent an actual treatment where I took intramuscular injections. Also moved to LA where my sun exposure increased by orders of magnitude.