I regularly blood-test my vitamin D and B levels since I live indoors a lot (not an outside person) and have a slight vit. B absorption problem (I don't absorb

I regularly blood-test my vitamin D and B levels since I live indoors a lot (not an outside person) and have a slight vit. B absorption problem (I don't absorb it as efficiently as normal people) so I need to take supplements even if I eat healthily.