[Terry_Roll]

K1 Enzyme I think I was thinking about. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6789135/

Salmon cataracts https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2709424/

>you can't consider a part of the body as if it were it's own isolated system True, we cant control where some chemicals go in the body, but this is where the pathways come into play or the other chemicals in a meal. For example, there is reportedly a gut receptor for copper or zinc which can take upto about 800mg a day, but copper and zinc are competing obviously. Other factors include say tea drinking, wear https://www.sciencedirect.com/topics/food-science/phytate inhibit copper, zinc and iron iirc.

So when thinking about say supplementing, sometimes the delivery mechanism or consumption format doesnt help.

Vitamin K1 doesnt appear to have an upper limit if taken orally, but inject it and you will get a reaction.

Its like a complex chemical maths puzzle, but by bit studies give us a range of info and its a case of piecing it all together. In some cases studies dont even exist!