Is the fact they are not metabolized not a bad sign?
From what you say and what I see in the studies it could help with liver injuries and endotoxin related issues but not sure what effects it could have topically on scar tissue (e.g. peyronie's disease, so scar tissue below the skin).
True, have not see much evidence on scar tissue. As far as metabolism - they are still metabolized, just much more slowly. That's why I said "resistant" to metabolism. The studies that looked at them did not find any issues, but feel free to post here anything you may find in that regard.