Park City, UT-based Momentous, a leading performance company focused on supplementation and nutrition, announced a multi-year partnership with Arnold Schwarzenegger and the launch of The Arnold Stack, a curated selection of products that includes protein, creatine, and vitamin D3.  

“I’ve seen every fitness trend come and go. Trends don’t build greatness. What actually works has never changed: committing to the basics and doing them well and consistently — you build greatness on a solid foundation,” Schwarzenegger said in a press statement. “I trust Momentous because they do things the right way, not the easy way. Real science, high standards, no shortcuts. This partnership is about cutting through the noise and helping people focus on what truly works to build a foundation to stay fit, healthy, and strong for life.”

The partnership introduces The Arnold Stack, a collection of Momentous supplements personally selected by Schwarzenegger that he uses daily to support performance, recovery, and longevity. The trio of products includes protein (available in whey isolate and plant-based options), creatine, and vitamin D3.

“In a world of fleeting health trends, Arnold represents something rare,” said Jeff Byers, co-founder and CEO of Momentous. “For 60 years, he’s stood for consistency, discipline, and results that last. That’s exactly what we embody with The Momentous Standard. This partnership aligns two forces built on the same foundation: do what works, do it often, and do it with intention. Arnold’s choice to partner with Momentous validates what our customers, elite athletes, and military partners already know — that our commitment to quality is unmatched. Together, we’re proving that in health and wellness, trust isn’t bought, it’s built through standards that never compromise.”

The partnership will activate across multiple touchpoints throughout 2026, including content collaborations, further product launches, and appearances at major fitness and wellness events, including the Arnold Sports Festival in Ohio this March.

The Arnold Stack is available now for $102.85, and Momentous subscribers receive 25% off their first purchase. 

Retail Expansion with The Vitamin Shoppe

This month, Momentous also announced its first national retail expansion with The Vitamin Shoppe. Momentous is now available in more than 640 Vitamin Shoppe and Super Supplements locations as well as online.

The partnership marks the company’s largest retail partner and follows the brand’s continued category growth, including recognition on the Inc. 5000 list (fastest growing private companies in the country) for three consecutive years. The Vitamin Shoppe will carry Momentous SKUs spanning protein, collagen, vitamin D3, and creatine, all of which are third-party tested and NSF-Certified for Sport.

“We’re seeing a fundamental shift in the supplement category, with consumers becoming increasingly discerning about what they buy and holding brands and retailers to higher standards for transparency and formulation,” said Byers. “As we continue to scale and connect with mission-aligned consumers wherever they are in their wellness journey, partnering with one of the most respected retailers in the category was a natural next step. We’re excited to bring our products, and the Momentous standard, to The Vitamin Shoppe shelves in 2026.”