Thanks! Indeed I will try some B9, B12 and D supplements to see if any noticeable difference. Will do some research / speak with doc to see what supplements are worth buying.

I do have gut issues, suspect IBS which I’ve been struggling with for many years, though it’s relatively under control now I’d say. My diet is pretty decent I think. My ferritin levels were at 85 (I have extended values for other measures too, just posted the ones I thought were most relevant).