I only meant that beta blockers may be a single trigger of OLP for those who take it, though a lack of TGF-β1 may occur for other reasons. A lot of foodstuffs act as natural beta blockers: potassium, the L-arginine that protein foods provide, garlic, etc. I think it's an interesting area for further research. In the meantime, yes, the corticosteroids appear to be the only reliable way to get relief.