Essential Nutrients

Here's the question: "Do we know all the essential nutrients including the amounts required by humans for good nutrition?" What do you think? What is the evidence? If you were a research scientist how would you prove your hypothesis? We are not asking about "foods" but rather "essential nutrients" - there's a difference!. We are not talking about "therapeutic nutrition" but rather "normal nutrition" "Science doesn't know everything" is not a good answer. "New foods will be discovered" is not a good answer. (Your answer should not include herbal medications or drugs or answers like "who knows what we may discover in the future?" or anything about possible discoveries in the Amazonian rain forest!). You may want to look up "Total Parenteral Nutrition" and see what is currently being done in nutrition based on current knowledge - does that help you answer the question? For example: http://www(dot)nutritioncare(dot)org/about_clinical_nutrition/what_is_parenteral_nutrition/ Links to an external site. Please be specific applying what you are learning.