Want clean, consistent energy that boosts your performance? NOW IS THE BEST TIME to try the world’s *First* Ketone Bar ⚡
If you haven’t tried the world’s first ketone-powered protein bar yet, now is the perfect time to experience ketone-powered energy (without the bitter taste of ketones or the strict ketone diet).
From December 29th to January 4th, you’ll save 20% off all Unlimited Bars and 30% off subscriptions.
Boundless Bar is powered by goBHB®, the gold standard form of beta-hydroxybutyrate (BHB), which helps stabilize appetite, support mitochondrial efficiency and enhance recovery.
You can choose between two delicious, clean flavors that deliver 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 high-sugar bars.
Are you ready to test performance with keto energy and save money while doing it?
You can shop Boundless Bar during the exclusive New Year here.
*Here* How to Get 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 your macros, the next it’s mobile devices and peptide stacks.
When was the last time you had a real team help you sort through the noise, guiding you step by step based on your unique biomarkers, goals and lifestyle?
With TRIUMPH Coaching, you get access to elite level support without the guesswork.
We have different training plans to meet you wherever you are. Work 1 to 1 with one of my expert coaches or as part of a team.
Whatever you choose, you’ll be rooted in real-time adjustments and results. Whether your goals include optimizing your VO2 max, chasing longevity, or simply trying to build muscle and mobility right from your living room, we’ve got you covered.
Want to explore TRIUMPH training options?
Fill out our training formand one of our expert trainers will contact you to discuss how to help you achieve great fitness and peak performance.
This Week in Health & Performance: What the latest research says
🥤 Ketones and Liver Health—Myth vs. Reality: Fears that ketones damage the liver stem from an extreme mouse study using the human equivalent of ~28 shots of a ketone precursor in genetically engineered mice with impaired liver protection (study here). On the contrary, many times more relative to man studies show no hepatotoxicity even improvements in liver markers with exogenous ketones (read more here and here).
🦵 Collagen for tendon strength and health: In a 16-week randomized controlled trial in young sedentary men, collagen peptide supplementation significantly increased calf force production and Achilles tendon stiffness, which are key indicators of performance and injury resistance.full study here).
🏃 Protein and Stamina—An Unexpected Benefit: Protein appears to enhance endurance performance not only through muscle support, but through essential amino acids that reduce 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 data tells a different story: ketones may be safe for the liver, collagen strengthens tissues critical to performance, and protein may boost endurance by protecting the brain as well as the body.
Want to dive deeper? Click on the links above to explore the survey 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 ever wanted to have meditation, focus and sleep training realmeasurable feedback, Muse offers just that.
Muse S Athena is a brain-sensing headband that trains your mind using real-time biofeedback.
It measures electrical brain activity (EEG), prefrontal cortex blood oxygenation (fNIRS), heart rate, breathing and movement, and then turns these 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 brain.
During biofeedback sessions, auditory feedback directly responds to brain activity. Calm mind, you hear birds. Distracted brain, stormy weather. This closed-loop system teaches immediate 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 adjusting guidance throughout the night. Clinical research shows users fall asleep 55% faster and improve sleep quality by 20%.
Based on over 1 billion minutes of real brain data, backed by over 500,000 users, and validated by 200+ research studies (including research from the Mayo Clinic), Muse is one of the most evidence-based tools I’ve seen for mental fitness training.
You can save 20% on the Muse S Athena from now until the end of January by going here and using the code BENGREENFIELD at checkout.
Podcast I’m recording this week:
Dry saunas vs. infrared vs. hot tubs, little-known ways to heal your gut, maintain muscle with ketones, and more! Solosode: 495
How to Microdose GLP-1 (and How to Make Eating Less Easy Even After You Stop Your Peptides) with Geoff Cook of Noom
