What is the reason why the milk powder jar of a2 milk powder stinks?

Fat oxidation. A2 milk powder is an infant formula containing natural A2 casein, which brings together A2 milk and milk experts from New Zealand, Australia, Britain and Ireland to study and present safe and healthy A2 milk powder. The quality room of this brand of milk powder is very good. The smell of milk powder cans is caused by the oxidation of unsaturated fatty acids in milk powder, so the milk powder should be kept away from light and sealed by heating. This brand has good quality and good reputation and is deeply loved by the public.