I used to have vitamin d3 deficiency and had corrected it with medication a couple of years back. After which i've lost around 30 kilos and i've started having hair fall and body pain. I am planning to consult a dietician soon and I was wondering what all tests I need to take when I check the d3 levels now. I plan to get my b12 checked too as I was recently diagnosed with peripheral neuropathy. I would like to know what other tests I would need to take. Especially for the hair fall and body pain.