Idk I say go for it personally. I ordered leaf litter from a reputable supplier and it quite literally looked like they were just scooping it off the ground and sending it off. It was full of insects, a spider or 2. Acorns, sticks, couple small rocks. Nothing terrible but still was a bit thrown off when I opened the packaging and found all that.

Boil the leaves/ soak in hot water. Bake @ 250 for 20-30 minutes.

If done this with leaf litter and wood/bark from out doors with no issues.