What supplements are you giving him? The reason he has yellow stripes now is because he is growing into his adult colors. They usually lose most of the green that they had as babies/juvies after shedding a few times and start getting more colors.
I noticed that at the bottom of the list of things reptiworms are good for, it says that they can help reverse metabolic bone disease. I was looking to get some, and I was just curious about this, because I thought MBD wasn't reversible. Was I wrong?
No. You asked if you could gutload them. You didn't ask if thy would eat the green cubes. We told you what to use to gutload them. So yes they can be gutloaded, but they are not properly gutloaded if you use the green cubes.