I do know, i always were petrified by that big brown bottle.
Their techniques, most likely, required lots of time to tweak and perfect. In today's world, they don't take cod liver oil for starters, this is simply because it is packed with vitamin A, and the is toxic in large doses. https://thenolugroup.co.za/groups/a-plan-to-make-assassins-creed-altair-costume/