Once those puppies dry, they’ll only be a ghost of their former selves. Mushrooms and fruits will retain a bit of body and bulk, but leafy greens will practically disappear. And since you’re making medicine, more is better.
When making a greens powder, it’s unnecessary to trim the plants exactly like you would for tea or salad. There are often lots of nutrients in the stems, so you can leave them in place unless they’re foul tasting.
Break out your dehydrator and arrange the plants a few centimeters apart on the trays. I dehydrate at 110° F for two to three hours, but it’s wise to follow the drying directions on your specific unit.