
Natural: from fish liver oil, or cod liver oil, or liver. NOT acetate or palmitate forms.
Active or Pre-formed: Vitamin A ready to be used as Vitamin A, without any conversions in our body. NOT precursors to vitamin A such as beta carotene.
PRODUCT: Blue Bonnet's Vitamin A pills or Alaskan Cod Liver oil by Garden of Life. (NOT Carlson's or Nordic Naturals.)
FOOD: Beef liver
Never take Vitamin D without Vitamin A.
Never take Vitamin A without Vitamin D.
Try to take Vitamin K2 and Vitamin E with both. 
Shaped by me, brought to life with ChatGPT. Still being checked for mistakes and truth.