I want to know the answer to the following question:
What did Hopkins believe was required other than calories, protein and minerals to help prevent deficiency diseases?
All the background I'm provided with is that "In the middle of twelve years of attempts to isolate them, Hopkins said in a 1906 lecture that "unsuspected dietetic factors," other than calories, protein, and minerals, are needed to prevent deficiency diseases.". Is that enough to answer the question?
Answer: yes