Hello There.
i can understand your concern,
if there is any deficiency of
vitamin b complex, vitamin d3 or
calcium. then you will have symptoms of generalised body pains, weakness, joint pains etc.
While there are tests to find out if you have any such deficiency, its not necessary to get these done in order to treat as an average indian is always deficient in these nutrients.
if you still want to get it done, serum calcium, vitamin D3 and
vitamin B12 can be determined by some standard reputed labs, but be aware that the tests will be expensive.
have lots of greens, fruits and vegetables.
have a high protein diet. have stuff made of ragi. have milk and milk products.
get sun exposure for natural production of vitamin d3 in your body.
best regards,
Dr. Anil kumar jain.