@
Ripley
Any idea if a small raw potato can be eaten in place of the unmodified (raw) potato starch?
Potatoes are nightshades (which are highly toxic), so I doubt are ancestors were getting their RS from nightshades. Potatoes have been domesticated to have less toxins than their wild nightshade counterparts. Our ancestors probably got their RS from more obscure sources that don't show up in our grocery stores (obscure roots, pollen, cactus, etc).
So, it's not advisable to eat raw potatoes. The main concern is solanine, and some potatoes that aren't fresh out of the ground can be flooded with some solanine, even though most of the solanine resides near the skin. If you eat a potato with solanine in it, the area near the skin will be green (which should be peeled away) and you'll notice a burning sensation in the back of your throat and you'll have some bad stomach discomfort 6-10 hours later while feeling pretty woozy. But, you could easily eat a slice of raw peeled potato or a
very fresh peeled potato and be perfectly fine.
What I'm trying to say is that you shouldn't make raw potatoes a major source of RS. It's still a nightshade no matter how you slice it. PS is perfectly fine since all of the toxins are water soluble and are washed away in the starch making process.