What does "IF works" even mean? Of course working out and eating food works. Isn't the whole discussion about different levels of efficiency?
We obviously don't have any controlled studies that specifically look at the efficiency of different diets paired with weight lifting when it comes to muscle building, so all we can really do is speculate. It's even more confounded when you have so many different individual variables.
Befriend a doctor who has access.
When I say "IF works" I mean, that I personally have had several clients who've had issues losing weight on a caloric deficit that, which switched to IF, they began to lose weight.
So, there's one guy who's been in the industry a decade saying that it works. I've also used 6 meals a day. It, too, works, but I've found IF to be much more successful for clients trying lose stubborn weight.
Grain of salt and all that.