The Science
The research behind Runners’ Relief
No miracle language, no hidden blends. This page lays out the peer-reviewed research on our ingredients, the exact doses in every scoop, and how to read the evidence honestly — so you can decide like a runner who checks their splits.
The problem we built for: the 24–48 hour window
The soreness that matters usually isn’t the day after a hard run — it peaks on day two, right when your next quality session is scheduled. String hard efforts together without supporting that window and the fatigue carries over: heavier legs, skipped sessions, a training block that quietly caps itself. That between-efforts window — not the run itself — is what Runners’ Relief is designed to support.
What published tart cherry research has found
Tart cherry is one of the most-studied recovery ingredients in endurance sport. Three findings runners should know:
Relay runners · RCT
68% less
Smaller increase in post-race muscle pain
54 Hood-to-Coast relay runners drank tart cherry juice or placebo twice daily for 8 days. Pain rose 12 mm (cherry) vs 37 mm (placebo) on a 100-point scale.
Kuehl et al., J Int Soc Sports Nutr, 2010 ↗Muscle-damage trial · RCT
4% vs 22%
Strength loss over four days after intense exercise
After an intense eccentric-exercise protocol, tart cherry drinkers lost 4% of strength over four days; the placebo group lost 22%.
Connolly et al., Br J Sports Med, 2006 ↗Marathon runners · RCT
IL-6 ↓ CRP ↓
Significantly lower inflammation markers post-marathon
20 marathoners took tart cherry concentrate around race day. Inflammation markers IL-6 (p<0.001) and CRP (p<0.01) were significantly lower vs placebo, and isometric strength recovered faster.
Howatson et al., Scand J Med Sci Sports, 2010 ↗How to read this honestly: these studies used tart cherry juice or concentrate, taken daily for about a week around hard efforts — they’re evidence about the ingredient, not this specific product. Results vary by study design, dose, and athlete. We’d rather tell you that plainly than borrow certainty the research doesn’t offer. What we control is the formula: a consistent 4,000 mg tart cherry fruit extract dose, every scoop, with every ingredient disclosed below.
Every scoop, fully disclosed
One scoop (9.7 g) daily. 30 servings per tub. 0 calories, 0 g sugar. No proprietary blends — this is the whole label.
| Tart Cherry (Prunus cerasus) Fruit Extract | 4,000 mg |
| Glucosamine Sulfate | 1,500 mg |
| Coconut Water Powder | 500 mg |
| Chondroitin Sulfate Sodium (std. to 90%) | 400 mg |
| Pink Himalayan Salt | 150 mg |
| Hyaluronic Acid (from 104 mg sodium hyaluronate) | 100 mg |
| Vitamin C 85 mg · D3 1000 IU · B6 20 mg · B12 20 mcg | included |
Glucosamine at 1,500 mg is the standard daily dose used in published joint-health trials — paired with chondroitin and hyaluronic acid for runners logging repeated impact, plus a vitamin complex that supports normal recovery physiology.
Quality you can verify
Every batch is manufactured in a cGMP-certified facility and tested by an independent third-party lab. Want the certificate of analysis for your batch? Ask us — real humans answer.
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. Research findings describe tart cherry as an ingredient (juice/concentrate forms) and individual results vary. If you take medication or have a medical condition, talk to your physician before use.