Cod liver oil isn't the same as fish oil. Whole other ball of wax. Fish oil doesn't need to be refrigerated if it's in gel caps, but in liquid it should be, though not until it's opened. Flax oil should be kept refrigerated, but if it's in gel caps it doesn't need to be refrigerated until the bottle is opened. If it's just liquid, then it needs to be refrigerated all the way down the line, from manufacturer to retailer and in your home.