however, the crystallinity of PAC is further enhanced at higher activation temperatures through the chemical selective removal of non-graphitic parts and amorphous carbon
Excellent dietary sources include : Meat and poultry : beef, lamb, pork, chicken, and particularly organ meats such as liver Fish and shellfish : salmon, trout, tuna, sardines, mackerel, and clams (which are exceptionally rich in B12) Dairy products : milk, cheese, and yoghurt Eggs : particularly the yolk For patients following plant-based diets or those with significantly reduced appetite, fortified foods can provide B12, including fortified breakfast cereals, plant-based milk alternatives, nutritional yeast, and some meat substitutes
PMID 17258528
I cannot choose between these routes until I have confirmed what is actually going on