What you are probably feeling is the effect of eating the potato. You eat the potato, your body breaks it down into sugar, insulin gets released to deal with the sugar, blood sugar drops and this signals the hunger center in your brain that you need food.
You'd probably do better with the hunger if you kept your blood sugar more stable with a lower GI carb.
BTW, I take R-ALA and I don't feel the hunger you are talking about. I do however get pretty bad headaches occasionally that disappear if I stop taking R-ALA.