I've been trying to dig through this thread and the forums, so pardon me if this has been addressed and I missed it!

I'm curious about how difficult it is to raise B12 levels through diet rather than supplementation. My B12 levels are sitting around 310 right now. I don't have dairy or bread/cereal, so I'm not really getting much of the fortified stuff. Is it feasible to get levels up to better levels through dietary means rather than supplementation? Duck eggs, fish, and the like. I tend to have unpleasant reactions to medications (and am allergic to nickel which to my understanding nickel and cobalt allergies often go together?), so I've been a bit nervous about trying B12 supplements though I do not know if I would even absorb enough from what I'd be eating. I've been doing a mostly paleo diet for a bit over a year so unfortunately while they suspect possible celiac or gluten issues, the blood test turned up negative so I am waiting to see a gastroenterologist.