THis reminds me of a Bogart movie........round up the usual suspects:mmmm:

First Calcium, Vitamin D Eating a good plant based diet, not an issue, blood work for D, bone density test for some, try exercise.

Vitamin B-12, that is an issue but a b12 supplement 2 or 3 times a week keeps it in check, blood test to confirm

Iron Deficiency, not an issue for us.

I will say if those are the disadvantages great, the advantages out weight them by about a million times. :D