I use no nitrates, but here is the conundrum,Real jerky is smoked (mine for 3 days)The smoking process breaks down the protiens in the meat and creates natural nitrates which in turn allows jerky to be stored for yrs.
The same happens when you sear a steak over charcoal,Thats why it has been said that Barbequed meat can be carcinogenic.
Are recipies for making jerky in an oven,but they are pretty bland.
Maybe Jerky is smoked, but traditional biltong is not - so it's nitrate free