You're more than right to ask this, because the term "all-natural" is not regulated the way the word "organic" is.
To us "all-natural" means "as found in nature". Powdered beet is a natural food colorant; FD&C Red No. 40 is not. Butter is real, transfat is fake. But it goes way beyond that. North American food culture has deteriorated to the point where chemicals and other synthetic, unnatural items are listed as "ingredients" in our food supply. This status quo is unacceptable to RFRK. In the Real Food Kitchen, you'll never find the following: artificial or chemical preservatives, artificial food colours and flavours, factory farmed meats raised with routine antibiotics or added growth-hormones, artificial trans-fats, nor artificial thickeners or fillers of any kind. What do we use in the Real Food Kitchen? Plants, ethically-raised meats, and spices. And, of course, inspiration. Lots of it.