I'm wary of synthetic vitamins. When I'm not making kefir and/or eating lots of veggie ferments, I take a probiotic (Renew Life). I take fermented CLO and high vitamin butter oil. I also take digestive bitters before meals if I'm not having a bitter salad. Otherwise I try to get most of my nourishment the old fashioned way- free range eggs, pastured meat/fat/dairy (sorry- I'm not officially paleo) and as local and seasonal as I can get and I consume a lot of nettle and bone broth. I do a lot of wildcrafting and foraging and spend time in the sun WITHOUT commercial sunscreen.