10+ year old, Corn, Quinoa, Barley - still eatable?

Hello all, I have 15 lbs of corn, big dry kernels, that have been stored in zip lock gallon bags for about 5 years. Do you think it's still advisable to eat them as cornmeal? At this point are they just food for the animals or should I just compost the lot.

Quinoa is stored in big recycled pickle jars - the Q is 10+ years old. Opinions seem to vary.

I'm of the opinion that the risk is not worth the reward as the reward is possibly in question. The risk??

I do remember that these were purchased at an organic company out of Denver.

Thanks for reading this .

Risk is mostly

A. Oils going rancid

B. Grain got slightly damp, then dry again after initial drying

The first is tested by smell.  Humans genetically react poorly to rancid oil smell.  Unless damaged sense of smell, it's pretty obvious.

Second is nulified by cooking long time at high temp like pressure cooking or full rolling boil or very, very hot oven.  But I consider the oven too much risk for me.  

Check local health advice and do what is comfortable for you.  Unless it is a starvation situation, I'm not a fan of eating grain products more thana few years old.  At the very least, the taste will likely be poor.

On reflection, if seeds are whole, a germination test to see if they would grow to a new harvest might be a useful path

To me, it really comes down to how it was stored.

If it was in an air-tight container stored in a cool, dark place it may be OKAY but I'd still be hesitant.

Personally, a zip-lock bag or standard pickle jar would be a no-go for me. I'd want something canned/vacuum sealed if possible. Even then, replacement would be easy enough currently for me that I would donate it to the compost bin.

All of the above.

I will add to smell the stuff to see if it smells rancid.

Taste test, some things smell okay though after cooking the food leave a funny after taste.

I'd feed to animals. Unless is an economic crisis, facing severe hunger, why eat them? Fresh whole grains are pretty cheap, except maybe specialty products like quinoa.
Corn is $10 for a 50 lb bag. Oats maybe $18.

If you must eat it. Smell it. Musty? Rancid? 'Off' smells of any kind? Avoid.

Plant them? Grow new food?  Local folks, even urbanities around here have taken to guerrilla Agfare, planting in some unusual places for the future.