"The theory behind not eating potatoes on the paleo diet is that they were not available during the paleolithic. White potatoes contain glycoalkaloids and solanins, which are somewhat toxic. Most of this is concentrated in the skin of the potato.
Most of us on PaleoHacks have moved beyond the re-enactment theory of paleo to evaluating foods individually for the pros and cons of each food as well as it's effects on us personally. In other words one person may be fine with potatoes and another could have difficulty. As an example, I am type 2 diabetic, so I don't eat a lot of potatoes. (I do love them still). But as long as you peel them and assuming the carb load is not a problem for you (sounds like it isn't) potatoes should be fine. In fact, potatoes have a lot of solid nutritional value. (Okay, not like liver and eggs, but pretty decent, anyways.)
If you do not react to nightshades, then potatoes are probably fine. People have been eating roots and tubers for a VERY long time.
Were potatoes available during the paleolithic? No. Neither were cows and chicken. Neither were most of the fruits and vegetables we consume. If you try to become to prescriptive and focus on re-enactment, the fact is there are very few things you would be able to consume.
Add a potato a few times a week. See how you feel. Do you get bloated or gassy? Do you get stomach pains? Or do you feel refreshed and invigorated? -- That's the only way to know if they will work for you.
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