Gut health, metabolism, and performance are more connected than you think. In this episode of In the Mix, we sit down with Dr. Rosa Keller, PhD, RDN — a nutrition scientist and registered dietitian — to explore how your gut microbiome, dietary nitrates, and metabolic flexibility shape everything from energy levels and recovery to long-term healthspan.

Dr. Keller shares her research on nitrates in vegetables (yes, the same ones that boost nitric oxide for better blood flow), explains why metabolic flexibility is key to preventing chronic disease, and reveals how your gut health impacts exercise performance and healthy aging.

💬 Topics Covered:
– What “healthspan” really means (and how it differs from lifespan)
– How gut health supports metabolism, energy, and recovery
– Why metabolic flexibility helps your body adapt to stress
– Nitrates, nitric oxide, and how greens improve cardiovascular function
– The role of fiber, butyrate, and short-chain fatty acids in gut health
– How dietary diversity supports athletic performance and longevity
– Science-backed supplements that improve nutrient absorption and muscle recovery

What does it really take to build a supplement brand in Canada?

In this episode of In the Mix, we sit down with Alexander Trent Forian— Mr. Canada, multi-time Canadian best poser, and the entrepreneurial mind behind Bull Nutrition and Fitness City Supplements.

Alex gets real about the challenges and wins of running a supplement company under Health Canada’s strict regulations, what makes the Canadian market different from the U.S., and how he and his team built Bull Nutrition into one of the country’s most talked-about brands.

If you’re in sports nutrition, brand development, or just love seeing what it takes to grow something real from the ground up — this one’s worth your time.

Go behind the scenes with Dave Rynecki, Director of R&D at Crush It Brands — the team behind Core Nutritionals, Merica Labz, Unmatched Nutrition, and MYOBLOX — as he breaks down how modern supplements are formulated.

In this exclusive conversation, Dave shares:

• How Crush It Brands balances trending ingredients with clinical validation
• Why ingredients like AstraGin® and Senactiv® are changing how athletes recover
• The future of peptide-based supplements and longevity formulations
• What it really takes to make products that perform not just sell

If you’re a formulator, brand owner, or fitness enthusiast, this is a masterclass in how real innovation happens in the supplement industry.

📘 Featuring ingredients by NuLiv Science — creators of AstraGin®, Senactiv®, and Zylaria®.
🔬 Learn more: https://nulivscience.com