I was diagnosed with B12 deficiency around 3 years ago now, I also had low folic acid at the time, but all PA tests have come back negative and have been done a number of times. Since then I've had more bouts of ill health that have turned out to be vitamin D deficiency ,and more recently low magnesium. I also have found I need to take co enzyme Q10 and high dose riboflavin with the magnesium to control the migraines/heart symptoms/black outs I was getting. The magnesium also cleared up 5 years of chronic hives (I was told were in my head!!) alongside needing a low histamine diet. I've also had issues with vitamin C in the past, high doses don't appear in my pee, TMI I know!! 😉 I did see a gastroenterologist this year (privately) but he seemed mostly unconcerned and as most blood tests came back ok, he wasn't willing to do anything invasive as I apparently don't have enough symptoms (multiple nutrient deficiencies, inability to digest food without supplementing with hydrochloric acid, and chronic bowel issues aren't symptoms, I need to be rolling around in agony before something's wrong...good grief) and was told to keep taking the acid tablets, nutrient supplements and probiotics. Funnily enough I'm more than a little concerned about what's going to happen next, and don't really want to get ill again, as I'm fairly stable at the moment. Given I need acid tablets to digest food I get the feeling I do have chronically low stomach acid, but can't be sure. Has anyone else experienced a broad spectrum of deficiencies like this and if so did you ever find a reason for them?