How to pronounce “ad libitum” in English

So, this was a German-Austrian hypothesis prior to World War II. It was known as the lipophilia hypothesis. I'll explain that in a second. The primary proponents where GustavAnd if I was writing that study, it would say "low fat, low calorie versus low carb, ad libitum. 'Ad libitum' means eat as much as you want. And I would always use those