Putting them down - Metabolic Bone disease

[2009queenb]

This one is geared more towards those who own, like, or know a thing or two about reptiles. I have quite a few reptiles, I don't know if any of you do. And a few months ago my friends bearded dragon and my other friends leopard gecko started showing (to me) signs of Metabolic bone Disease. One had developed lumps on parts of its body and had an odd disfiguration in the jaw. the other one was very slow, limp, lazy, and had weird jerky movements. I was appalled at how advanced it seemed in the leo. One had old bulbs the other one didnt offer appropriate an calcium regimen. So I suggested they get some uvb for both (I even bought them the zilla desert 50 bulbs I like using because I've been using them for a while now. Use what you trust is what I say.). Now, leopard geckos don't require uvb lighting because they are nocturnal. But in my opinion, I think there has to be SOME benefit having them on it. I read somewhere there was a survey being done which showed some benefits in them with use. Don't have the link though. Do you think that uvb lighting provides any benefits to nocturnal reptiles?
My other question is, do you think mbd in reptiles can be reversed? I hear you can only minimize the damage that is already done and there is no "reversal." What are your thoughts on this since I've found no conclusive evidence.
Lastly, if you had a reptile that was this bad in an advanced stage of MBD, and you knew he/she could not be cured, would you consider putting him/her down?
All tough questions I know, but this ordeal with my friends got me thinking.

[Darby]

Arboreal nocturnals, it seems, would still be exposed to daylight, wouldn't they?