I use normal bulbs of garlic as it was as I learned to cook (my country grows and uses garlic a lot) but I had no problems using 'pre prepared' garlic when I lived in other countries, BUT I would recommend everyone that does so to make sure it is sourced ethically (seems most peeled garlic in America comes from china, which doesn't have a good track record: https://www.ft.com/content/1416a056-833b-11e7-94e2-c5b903247... )