Yes it is.
no!!
take it the vet
No Ipomoea plants do not have edible roots. They are grown for their foliage only.
The part of the sweet potato plant that you eat is the root. The entire root is edible.
All Sweet Potatoes that are of the Latin name Ipomoea Batatas, have both edible roots,(or tubers)and edible young tender green leaves. You can also eat the dried roots and dried vines. This site tells the story well......http://en.wikipedia.org/wiki/Sweet_potato Some sites list the foliage as toxic. I ate them. I was dilicious and I was ok.
Potato skins
sweet potato
Potato skins are generally just referred to as potato skins or occasionally they may be referred to as potato boats.
A sweet potato
There are pig skins that you can eat!
the only way to make it is buy i dont know