I don't follow your argument, George. I have no idea how many recipes there are in his two books, but given that the first has 265 pages it would seem fair to assume that there are not more than 500 recipes in total. Now if he has been researching these books for (say) ten years, then that's maybe 50 recipes a year. Assuming that it takes several attempts to bring each to perfection, then that's not more than one curry a day. That doesn't seem to pose any health risk to me. What risks do you envisage ?
** Phil.