Premium Fuel for Hybrid Athletes
GRIND-RX
Specially developed for hybrid athletes. Think CrossFit, Hyrox, obstacle racing, functional fitness, and everything in between.
The face behind GRIND-RX
GRIND-RX isn't a project of marketers or investors, but of athletes who are right there in the thick of it. From our own training and experiences with CrossFit and Hyrox, we saw one thing increasingly clearly: the supplement market revolves primarily around standard fitness, not the hybrid athlete.
I'm Marco Bosklopper – founder of GRIND-RX , CrossFitter, Hyrox athlete, and father of two. I know how important nutrition and recovery are to maximizing your performance. Frustrated with standard fitness supplements, I decided to do it myself: create supplements that I use every day—transparent, effective, and free of unnecessary additives.
We believe: if it works for us, it will work for you.
No noise. No nonsense. Just pure performance.
At GRIND-RX, it's all about results. No empty fillers, no underdoses, no jars that are merely marketing.
Our formulas are simple: only ingredients that work, in dosages that make a difference.
For athletes who train harder. Go further. Demand more.
For athletes who combine strength, conditioning and focus
The drive behind GRIND-RX
GRIND-RX was born out of frustration. Too many supplements full of empty promises, under-dosed blends, and ingredients that only look good on a label. We wanted something different: products that actually work for the hybrid athlete.
Why? Because the market is flooded with standard fitness supplements, but offers little for athletes who demand more. Think CrossFit, Hyrox, and functional training—sports that combine strength, endurance, and focus.
Building better supplements together
We make GRIND-RX together
GRIND-RX isn't just about what we think—it's about what you need as a hybrid athlete.
Are you missing a specific supplement? Do you have an idea for a unique blend? Or do you see a combination that makes you think, "Why doesn't this exist yet?"
Please let us know via the contact form.
We're always open to suggestions, feedback, and new ideas. Your input might just become the next GRIND-RX product.