Are you sure that isn’t SOY instead of LOY?
Never let boys eat soy if you can help it. At least if you’re European or African. I occasionally wonder if there is a gene for soy tolerance in parts of Asia that block the detrimental effects on young males.
Loss of chromosome Y (LOY) in blood cells is associated with increased risk for disease and mortality in aging men
https://www.ncbi.nlm.nih.gov/pubmed/28424864
Not related to SOY but related to Low Y Chromosome.