Yep, there will be more than a few opinions on mold.
We all end up suffering from it to some extent.
Bottom line is you should be using the best you can grow... It's our advantage over commercial.
That being said, I've tried citric acid in water, and hydrogen peroxide, both sprayed at the leaf, at one time or other.
They were both effective.
Immediately after the application I used fans, and electric light bulbs for heat. Make sure they get absolutely dry dry before packing it away for storage.
Other times I've torn off perfectly color cured portions, separating it from parts that were damaged by nasty black mold.
A controlled environment is critical to better quality color-curing.
Take it to a very dry, low case and hold it there for a period of time before storing it, compressed or in hands.
Stable temp/humidity is best for storage.
...That usually means in the house...
Good luck
rc
...and my biology ain't so good... I'm just not real sure what the mold actually does to the cell structure of the leaf.
Can't be good, though.
It's all gotta be a degeneration of the leaf, and lesser quality.
Harmful to health? Sorry, I don't know that either. I'd guess probably.
Get a 2nd opinion on anything I might say!