Liu J, Huang Y, Li T, Jiang Z, Zeng L, Hu Z
doi:10.1155/2011/458427
Free fatty acids are released into the bloodstream, but unless you are in a caloric deficit or exercising to oxidize those fatty acids, they are simply re-esterified and stored again
This is particularly beneficial for individuals who may be dehydrated or lacking in certain vitamins and minerals due to poor dietary choices or illness
doi: 10.1016/j.gene.2018.11.014 221 LiuLZuoYXuYZhangZLiYPangJ
There isnt enough data on B12 fortified foods and cooking but as high temperatures lasting for an extended period of time are needed for B12 to be destroyed, its unlikely that, for example, heating plant milk for coffee would cause significant losses