ATP is adenosine triphosphate. ATP is the end product of a long series of cellular reactions during which food is broken down via the "Krebs cycle" (also known as the TCA or tricarboxylic acid cycle), followed by the respiratory chain (also called the electron transport chain). Unfortunately, you can't just buy and consume ATP from the grocery. I had to relearn all of this biochemistry after being told of my mutations, both of which directly impact the mitochondria, which is where the respiratory chain is located. If the respiratory chain isn't working properly, loads of free radicals, like superoxide ion, are generated, and the free radicals are highly reactive and damage nearby proteins, structures, DNA, etc. in and beyond the mitochondria. If it's any consolation, humans on average have 400 mutated genes, the vast majority of which are silent or benign. But now and then, you get a real zinger or two. May all your mutations be benign/silent!