Sorry I should have been more clear Ignore the table on the right column for now and look at the table appearing in the body of the text To take just one of several examples compare Vitamin C under without skin  RDA and under with skin  RDA Are we really to believe that  grams of potato skin contains  negative five per cent RDA of Vitamin C Adding skin reduces several other values as well The preceding wasnt original research but the following is Potato skin is a miracle diet food The more you eat the more nutrients you lose