The injury nobody talks about
Tendons, ligaments, and cartilage don't recover the way muscles do. They have poor blood supply, slow turnover, and they degrade silently over months of training load until one day they don't. Most overuse injuries start long before you feel them.
Most performance nutrition focuses entirely on what happens during training. Nobody is thinking about the connective tissue that has to hold everything together across hundreds of miles, thousands of foot strikes, and years of training.*
Foundation is built for that. Not the workout. The infrastructure behind the workout. The tendons, ligaments, cartilage, bone density, and baseline hydration that allow you to train consistently without falling apart.*
FORTIGEL® and TENDOFORTE® are not generic collagen. They are specific bioactive peptide compounds with peer-reviewed clinical research specifically targeting the connective tissue structures most vulnerable in endurance athletes.*
Two compounds. Two targets. One formula.
FORTIGEL® = Cartilage
✓ Cartilage tissue regeneration
✓ Joint mobility support
✓ Peer-reviewed clinical data
✓ Targets cartilage specifically
✓ Validated in active adults
TENDOFORTE® = Tendons
✓ Tendon strength support
✓ Ligament integrity
✓ Peer-reviewed clinical data
✓ Targets tendons specifically
✓ Validated in endurance athletes
Why it matters: Generic collagen doesn't target specific tissue types. FORTIGEL® and TENDOFORTE® are engineered to reach the connective structures that take the most punishment in endurance sport.*
No generic formulas. No underdosed fillers.
Collagen works on a longer timeline than most supplements. Here's what the research shows.*
Day 1 — Week 1
The electrolyte complex starts working immediately. Most athletes notice improved baseline hydration within the first week, particularly during and after training sessions.*
Weeks 2 – 4
Collagen peptides begin stimulating collagen synthesis in connective tissue. Some athletes report reduced joint stiffness and improved morning mobility within the first month.*
Months 2 – 3
Clinical studies on FORTIGEL® and TENDOFORTE® show the most significant cartilage and tendon adaptations occurring at 8–12 weeks of consistent daily use.*
Ongoing
The real value of Foundation is cumulative. Athletes who stay consistent report improved training durability, fewer niggles, and better resilience under sustained training load over time.*
Unlike pre-workouts or intra-workout supplements, Foundation works through accumulation. Missing a single day doesn't matter. Missing weeks does. The simplest way to stay consistent: take it at the same time every day. Most athletes choose the morning routine.
Who it's for
You're not here for a quick fix. You're building something long-term. Foundation is for athletes who understand that staying consistent matters more than any single workout and that the body has to hold up to make that possible.
Who accumulate load on knees, hips, and Achilles week after week and need their connective tissue to keep up
Managing repetitive joint stress across multiple disciplines over long training blocks
Who know how fast fitness disappears and want to do everything possible to stay healthy this time
Whose connective tissue recovery is slower than it used to be and whose training doesn't account for that yet
FORTIGEL® has been shown in clinical studies to stimulate cartilage tissue regeneration, supporting the joint cushioning that high-mileage training erodes over time.*
TENDOFORTE® is specifically researched for tendon and ligament support in athletes under repetitive load. Most collagen supplements can't say the same.*
Over 1,400mg of electrolytes including sodium, potassium, magnesium, and more to maintain baseline hydration even on rest days, not just during training.*
Vitamin D3 helps your body absorb calcium and maintain bone mineral density which is particularly important for endurance athletes at elevated stress fracture risk.*
Most collagen products use generic hydrolyzed collagen with no clinical research behind the specific product. FORTIGEL® and TENDOFORTE® are specific bioactive collagen peptide compounds developed and clinically tested by GELITA, the world's leading collagen manufacturer. FORTIGEL® has peer-reviewed studies specifically showing cartilage tissue stimulation. TENDOFORTE® has clinical research specifically on tendon and ligament support in athletes. The evidence is for these specific compounds, not collagen in general.*
The electrolytes work immediately. For joint and connective tissue support, clinical studies on FORTIGEL® and TENDOFORTE® show meaningful results at 8–12 weeks of consistent daily use. Collagen works through gradual structural adaptation. It's not a supplement you feel on day one. The athletes who benefit most are those who commit to daily use for a full training block.*
Research suggests collagen peptides are most effective when taken 30–60 minutes before exercise. The increased blood flow during training appears to enhance delivery to connective tissue. However, consistency matters far more than perfect timing. If pre-workout doesn't fit your routine, take it every morning with your first drink. The daily habit is what drives results.*
No. The bioactive collagen peptides in Foundation are derived from bovine sources. Collagen is an animal-derived protein and there is currently no vegan source that replicates the specific bioactive peptide compounds used in Foundation. If you follow a vegan diet, our Complete Protein, Salty Carbs, and Extra Mile products are all 100% plant-based.
Yes. Foundation is designed to sit at the base of the full RNWY stack. Take Foundation daily (ideally in the morning), Extra Mile® before training, Salty Carbs® during efforts lasting 60 minutes or longer, and Complete Protein post-workout. There are no conflicts across any combination.*
Yes. Foundation contains 9g of protein, 0g sugar, and zero added sweeteners. The macros are compatible with both keto and paleo approaches. Check the full Supplement Facts panel to confirm it fits your specific dietary targets.
Daily longevity for athletes who play the long game.
Clinically-studied bioactive collagen peptides. 1,400mg electrolytes. Vitamin D3. One daily serving to protect your joints, tendons, and baseline hydration. Every single day.*
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Overall rating: 4.7014923 / 5 from 67 reviews.
RNWY Foundation® is a daily supplement designed to support joint mobility and hydration. It includes Bioactive Collagen Peptides® for joint and tissue support, a broad spectrum of electrolytes for hydration, and vitamins for bone health. The product is Informed Sport-certified and backed by rigorous third-party testing.
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"RNWY sour cherry (mixed into coffee) is my go-to pre-run beverage. It not only helps hydrate me, but also provides collagen for my bone and joint health. It mixes in well, with little leftover residue, and tastes great. I recommend it, to runners like myself especially!"
"I love that I am getting my collagen, electrolytes and lots of B vitamins all in one. Makes the morning runs easier to get out the door!"
"I use foundation every day! Love the taste and it has helped me stay injury free and healthy! Can't ask for anything more than that"
"I’ve been taking this every day and it’s made a big difference in how hydrated I feel, especially on training days. It’s easy to drink and doesn’t feel heavy at all. I’ve also noticed my joints feel better overall, which is a huge plus. Super easy to keep up with :)"
"A fantastic addition to my marathon training and overall fitness routine. The taste is great, too!"
"Thank you for simplifying my routine. no more pantry full of tubs, bags and pills. RNWY just saved me time and money"
"This is a great tasting product that helps combine two important elements in my stack - hydration and collagen!"
"I really like this stuff. Flavor is good, electrolytes and collagen. Dissolves well in a shaker. Part of my regular routine."
"This stuff is great! RNWY foundation is my go to after my morning runs. The flavoring is delicious and refreshing."
"My favorite out of the RNWY products; flavor is amazing!!"
