Want Clean, Steady Energy That Enhances Your Performance? NOW’S the Best Time to Try the World’s *First* Ketone-Powered Bar ⚡
If you haven’t tried the world’s first ketone-powered protein bar yet, now is the perfect time to experience ketone-fueled energy (without the bitter ketone taste or the strict keto diet).
From December 29 to January 4, you’ll save 20% off all Boundless Bars and 30% off subscriptions.
Boundless Bar is powered by goBHB®, the gold-standard form of beta-hydroxybutyrate (BHB), helping stabilize appetite, support mitochondrial efficiency, and enhance recovery.
You can choose from two delicious, clean-fueled flavors that deliver on taste and performance:
- Cinnamon Roll (270 calories): Warm cinnamon spice, creamy cashew butter, and light sweetness from honey + monk fruit.
- Vanilla Cheesecake (260 calories): Smooth, rich, naturally flavored—satisfying without the crash of high-sugar bars.
Ready to experience ketone-powered performance and save while you do it?
You can shop Boundless Bar during the exclusive New Year’s Sale here.
*Here’s* How to Receive Coaching, Workouts & Biohacking Support—with TRIUMPH Coaching
I get it—navigating your health and fitness in today’s world can feel like chasing a moving target. One week, it’s about your macros, the next, it’s wearables and peptide stacks.
When was the last time you had an actual team helping you sort through the noise, guiding you step by step based on your unique biomarkers, goals, and lifestyle?
With TRIUMPH Coaching, you gain access to elite-level support without the guesswork.
We have different coaching plans to meet you wherever you are. Work 1-on-1 with one of my expert coaches, or as part of a group.
Whatever you choose, you’ll be rooted in real-time adjustments and results. If your goals involve optimizing VO2 max, chasing longevity, or just trying to build muscle and mobility right from your living room, we’ve got you covered.
Want to explore your TRIUMPH coaching options?
Fill out our coaching form, and one of our expert coaches will reach out to discuss how to help you achieve extraordinary fitness and peak performance.
This Week in Health & Performance: What the Latest Research Says
🥤 Ketones & Liver Health—Myth vs. Reality: Fears about ketones harming the liver stem from an extreme mouse study using the human equivalent of ~28 shots of a ketone precursor in genetically altered mice with reduced liver protection (study here). But in contrast, multiple human-relevant studies show no hepatotoxicity and even improvements in liver markers with exogenous ketones (read more here and here).
🦵 Collagen for Power & Tendon Health: In a 16-week randomized controlled trial in young sedentary men, collagen peptide supplementation significantly increased calf power output and Achilles tendon stiffness, which are key markers for performance and injury resilience (full study here).
🏃 Protein & Endurance—An Unexpected Edge: Protein appears to boost endurance performance not just through muscle support, but by essential amino acids reducing central nervous system fatigue, which helps athletes go longer and harder than expected (study here).
Key Takeaway: Extreme study designs often drive scary headlines, but real-world human data tell a different story: ketones can be liver-safe, collagen strengthens performance-critical tissues, and protein can enhance endurance by protecting the brain as much as the body.
Want to dive deeper? Click the links above to explore the research, and click here to follow me on X for all the latest health and performance news hot off the press!
Product Of The Week
::: Save 20% on the Headband That Trains Your Brain Like a Muscle :::
If you’ve ever wanted meditation, focus, and sleep training to come with real, measurable feedback, Muse delivers exactly that.
Muse S Athena is a brain-sensing headband that trains your mind using real-time biofeedback.
It measures electrical brain activity (EEG), blood oxygenation in the prefrontal cortex (fNIRS), heart rate, breathing, and movement, then turns those signals into live guidance you can actually use to sharpen focus, reduce stress, and improve sleep.
While most wearables just track data, Muse actively trains your brain.
During biofeedback sessions, audio feedback responds instantly to brain activity. Calm brain, you hear birds. Distracted brain, stormy weather. This closed-loop system teaches direct self-regulation through repetition and feedback.
Muse is also one of the most accurate sleep wearables on the market, detecting sleep stages in real time and adapting guidance through the night. Clinical research shows users fall asleep 55% faster and improve sleep quality by 20%.
Built on over 1 billion minutes of real brain data, supported by more than 500,000 users, and validated by 200+ research studies (including Mayo Clinic research), Muse is one of the most evidence-based tools I’ve seen for training mental fitness.
You can save 20% on Muse S Athena from now through the end of January by heading here and using code BENGREENFIELD at checkout.
Podcasts I Recorded This Week:
Dry Sauna Vs Infrared Vs Hot Tub, Little-Known Ways To Heal The Gut, Maintaining Muscle With Ketones, and More! Solosode: 495
How To Microdose GLP-1 (& How To Make Eating Less EASY Even After You Stop Your Peptides) With Geoff Cook of Noom
