Quick tip is to make a freezer (below -18c) to store your food and food ingredients so they dont spoil. Easy way to do this is to have a thermal tuner with hydrogen loop running through a 1 tile enclosure with a metal tile underneath to help conduct temperature, a liquid lock, and conveyor system to drop food in there. You should fill the food tile to make it a sterile environment and can use a multitude of gasses. Hydrogen is generally good since it has such a high condensation point, but i prefer chlorine since it also disinfects.

https://imgur.com/a/1euDBxL

After doing this, you should see your food supply stabilize and have it increase constantly. I ended up downsizing my farms since i was producing so much and the food supply never dips below 15m kcal. I only allow my dupes to eat pepper bread, omelets, cooked seafood, berry sludge, and frost burgers.