IMHO, all PUFAs [polyunsaturated fatty acid] oils are unstable.
I'd toss it and use something else. Rancid oil will deplete your vitamin E. If it's not rancid yet, inside your body it will oxidize faster because your body temperature is about 98* F.
Want the most stable oil of all? Coconut oil and contrary to popular belief, it's the healthiest with it's high sat fat content.
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