I've recently taken my mom for a health check-up, and her results showed that she's low on Vitamin B12 and Vitamin D. Her Vitamin B12 level is 133 pgml, and her Vitamin D is 12.5 ngml. I'm really concerned and would love to know what might be causing these deficiencies and what kind of treatments are available. Also, which type of specialist should we see to get this sorted out?