hi, thanks for using healthcare magic
can occur in uncontrolled diabetes
. In this condition the body is either short of insulin
or cannot use it and as a result starts breaking down other tissues for energy.
Ketosis can be associated with an odor but is he had an odour related to ketosis , he would have been diagnosed with diabetes before because he would have felt unwell because of the elevated blood sugar and the fluid loss that is associated with it.
There is unlikely to be any connection between the smell you are describing.
I hope this helps