Guests: Dr. Bill Weiss, The Ohio State University and Dr. Rich Erdman, University of MarylandTonight we finish the conversation on the new NRC with two legends in the industry. We’ll first focus on macro minerals, trace minerals and vitamins, but then we’ll also put a bow on the NRC series and wrap it up for our listeners tonight. Dr. Bill Weiss says the new NRC defines “requirements” which was never done in past NRCs. They give a specific number for a specific population which is a large improvement for the reader. (9:55) Dr. Rich Erdman discusses the animal’s needs or requirements in order to maintain herself. He discusses the availability of vitamins, trace minerals and macros as well. (19:50) Dr. Bill Weiss discusses trace minerals and the factorial system used in the new NRC for these minerals such as manganese, iron, selenium and iodine. He discusses the copper and zinc data found in the 2021 version are based on the maintenance requirements of the cow. (33:33)Dr. Rich Erdman stresses there is still a need for more specific data on the availability of supplements and feed. (50:10)Dr. Bill Weiss discusses challenges for the next editions of the NRC (now NASEM) such as finding young scientists specializing in minerals, funding and the USDA recognizing that minerals are important and should be focused on. (1:05:53)This concludes our series on the 2021 8th Revised Edition of the Nutrient Requirements of Animals. If you’d like to pre-order a copy and receive a 25% discount, visit Balchem.com/realscience and click on the NRC series for a link and the discount code.  If you like what you heard, please remember to hit the 5-star rating on your way out. Don’t forget to request your Real Science Exchange t-shirt. You just need to like or subscribe to the Real Science Exchange and send us a screenshot along with your address and size to ANH.marketing@balchem.com. Please subscribe and share with your industry friends to bring more people to join us around the Real Science Exchange virtual pub table. This podcast is sponsored by Balchem Animal Nutrition and Health.