I wonder these same things. I was reading on Youreatopia the other day and Gwyn, the author of the site, I think is saying that the more you eat, the faster the process will go. That’s what I got out of it. I’ve been eating upwards of 4500 calories a day recently and I’ve been doing good. It’s hard to do though.
Here’s that article I mentioned on youreatopia
“The less you eat, the longer it takes to recover as the harder it is for your body to find any excess energy to repair the damage.”
Again, seems like she is saying more calories will heal you faster