In this episode, Dr. Jonathan Allen joins us to unpack the science behind some of today’s most popular dietary supplements and the claims that surround them. From protein powders and creatine and their role in muscle development and brain energy, to collagen supplements marketed for beauty and health, and even the rise of greens powders as a convenient nutrition option, Dr. Allen explains what the evidence actually shows and where hype may outpace biology. Throughout the conversation, we emphasize the importance of looking beyond marketing, understanding how supplements are metabolized in the body, and using reviews and meta-analyses to evaluate the science. Tune in for a practical, evidence-based discussion on how to think critically about supplements and make informed decisions based on your individual health needs.

Learn more about Dr. Allen’s work below:

NC State Bio Page: https://cals.ncsu.edu/food-bioprocessing-and-nutrition-sciences/people/jallen/

The Science That Feeds Us podcast brings together extension agents, faculty specialists, and scientists for interdisciplinary conversations on emerging trends in agriculture and the food system. Designed to inform and engage both professionals and curious consumers, we highlight the stories behind the science to build deeper connections to food and agriculture research. The Science That Feeds Us is supported by NC State Extension and NC State University.

Edited and Produced by: Bhavisha Gulabrai

Music: Podcast theme music by Transistor.fm. Learn how to start a podcast here.

In this episode, we sit down with Dr. Manuel Kleiner to explore all things gut health. Dr. Kleiner breaks down how trillions of bacteria work together to help us digest food, protect our health, and shape the way our bodies function. We dive into his research on how different protein sources, like eggs, red meat, and plant proteins, can alter the microbiome and impact long-term health. He also shares science-backed advice for supporting gut health, the importance of dietary fiber diversity, and why popular trends like the “protein craze” may not be as beneficial as they seem. Tune in to hear why diet diversity, microbial interactions, and patience in adapting your gut are central to maintaining a healthy microbiome.

Learn more about Dr. Kleiner’s work below:

NC State Bio Page: https://provost.ncsu.edu/people/mkleine/

The Kleiner Lab: https://kleinerlab.cals.ncsu.edu/

Check out the following resources to learn more about today’s topic:

Article: Dietary protein source alters gut microbiota composition and function: https://academic.oup.com/ismej/article/19/1/wraf048/8089909

Article: Dietary protein from different sources escapes host digestion and is differentially modified by gut microbiota: https://pubs.rsc.org/en/content/articlehtml/2025/fo/d5fo01132a

Article: Assessing the diversity and functional profile of the “microbial proteome” in fermented foods: https://www.biorxiv.org/content/10.1101/2025.11.19.689333v1.abstract

Article: Source of dietary protein alters the abundance of proteases, intestinal epithelial and immune proteins both directly and via interactions with the gut microbiota: https://www.biorxiv.org/content/10.1101/2025.01.09.632171v1

The Science That Feeds Us podcast brings together extension agents, faculty specialists, and scientists for interdisciplinary conversations on emerging trends in agriculture and the food system. Designed to inform and engage both professionals and curious consumers, we highlight the stories behind the science to build deeper connections to food and agriculture research. The Science That Feeds Us is supported by NC State Extension and NC State University.

Edited and Produced by: Bhavisha Gulabrai

Music: Podcast theme music by Transistor.fm. Learn how to start a podcast here.

In this episode, we sit down with Dr. Carrie Pickworth to break down one of the most talked-about and often misunderstood topics in food and agriculture: beef production. From grass-fed to grain-fed systems, Dr. Pickworth explains what these production terms actually mean and how beef cattle are raised across different stages of their lives. We explore how cattle diets influence growth, efficiency, and meat quality, what science says about the nutritional differences between grass-finished and grain-finished beef, and why those differences matter far less for human health than many headlines suggest. The conversation also addresses common concerns around hormones and antibiotics, including how they are used, what safeguards are in place, and why context is critical when interpreting risk. Finally, Dr. Pickworth discusses the role of cattle as upcyclers in a sustainable food system, the use of byproducts that would otherwise go to waste, and what excites her most about the future of beef research and production.

Learn more about Dr. Pickworth’s work below:

NC State Bio Page: https://cals.ncsu.edu/animal-science/people/carrie-pickworth/

Check out the following resources to learn more about today’s topic:

NC State Extension - Beef: https://beef.ces.ncsu.edu/

North Carolina Cattlemen’s Association: https://www.nccattle.com/

National Cattlemen’s Beef Association: https://www.ncba.org/

The Science That Feeds Us podcast brings together extension agents, faculty specialists, and scientists for interdisciplinary conversations on emerging trends in agriculture and the food system. Designed to inform and engage both professionals and curious consumers, we highlight the stories behind the science to build deeper connections to food and agriculture research. The Science That Feeds Us is supported by NC State Extension and NC State University.

Edited and Produced by: Bhavisha Gulabrai

Music: Podcast theme music by Transistor.fm. Learn how to start a podcast here.