“Those with the variant have lower levels of zinc in the body”
Interesting. Like most Aspies, I suffer from Depression but have been taking Zinc for decades and rarely have bouts.
I was recently doing research on cancer. One recent study of nine common cancers determined that all the cancer tissues were deficient in zinc, even when surrounding normal tissue was adequate or abundant with zinc. It would be interesting to look at variations in the common versus low zinc genes and the prevalence of various kinds of cancer in different people and tribes, related to the zinc usage genes. Maybe produce a test like that for breast cancer gene(s) showing who should make a point of consuming more zinc in diet or supplements to prevent cancer.