I have a whole complicated theory about Ultramarine blue from a few years ago. I figure I’ll pursue it further sometime. Always working on something tongue emoticon But it’s related to WHY the b12 is so uniquely important to UV protection of cells and such… it’s related to Zinc which I believe protects in other ways. [think of how steel is ‘tinned’ with zinc so that it’s protected against the weather and the sunlight. I believe it serves the same function in the body].