I had a gastric bypass about 6 years ago. I was doing fairly well, lost 135 pounds, and just gained about 15 or so from my all time low. I get a lot of protein, don't drink soda etc.Also had a neck surgery about 7 years ago and I use a fentynal patch 12 every 48 hours. Recently I was super tired , bad headaches, muscle tremors brain fog - just alot of aliments! I had a complete blood tests - vit D hydroxy was 22.6 ng/ml. Also my Vit B12 was 411 which isn't super low but still a concern. Because of the way my instestines are now- I can not asbord the vitamins I need. So I have to take mega doses. Currently I am taking the following: 220, 000 iu of vit D PER WEEK. Also lots of B1, and B12, magnesium complex, glucosamine MSN and collagen. I also take RX of sertraline (zoloft) Gabapentin and trazadone to sleep. So please anyone comment with suggestions or any help!