The runner’s problem set (and why ultras are different)
- High mileage & doubles drive mitochondrial stress, micro-tears, and central fatigue.
- Hills & descents add heavy eccentric loading to quads, calves, and connective tissues.
- Back-to-back long runs & ultras (50K–100M) stack hours on feet, glycogen depletion, GI strain, sleep/circadian disruption, inflammation, and electrolyte/vascular challenges.
- Race travel, heat, altitude increase oxidative stress and immune load.
Translation
You don’t just need calories—you need cellular energy efficiency, faster muscle/tendon repair, robust connective tissue turnover, calm inflammation, reliable circulation, and deep sleep architecture that actually restores you.
What the body needs to keep stacking quality miles
Mitochondrial output & efficiency
- Better mitochondrial quality control (mitophagy/autophagy) to clear damaged mitochondria.
- Support for ATP production to maintain pace late in workouts/races.
- Metabolic flexibility to spare glycogen and reduce perceived exertion.
Muscle repair & soreness control
- Rapid activation of muscle protein synthesis pathways for micro-tear repair.
- Eccentric-damage mitigation (downhill, strides, intervals).
- Less DOMS so intensity can repeat.
Tendon, ligament & joint durability
- Support collagen synthesis, cartilage ECM (proteoglycans, hyaluronic acid).
- Healthy inflammation resolution without blunt over-suppression.
- Targeted nourishment for Achilles, patellar tendon, knees/ankles/hips.
Circulation & oxygen delivery
- Smooth vascular tone for steady pacing and thermoregulation in heat/altitude.
- Micro-circulatory support for tissues under repetitive load.
Sleep & immune resilience
- Downshift sympathetic drive for deeper SWS/REM after hard blocks.
- Immune readiness during peak weeks/travel to avoid lost training days.
What does it mean for you?
As an ultra runner, your limiter isn’t grit—it’s whether your body can keep turning training into adaptation day after day. You need efficient cellular energy so pace doesn’t fall apart late, faster muscle repair to handle eccentric damage and keep soreness from lingering, and durable tendons, ligaments, and joints that stay quiet under repetitive load. You also need strong circulation for oxygen delivery, heat/altitude management, and tissue nourishment—plus truly restorative sleep and immune resilience so you can recover from big blocks and keep stacking quality miles without missed days.
How Pürblack works as a system
Morning (Activation & Energy Economy)
Research Grade shilajit Resin (AM)
- Rich in ashless humic acids, fulvic acids, and 80+ bioactive minerals supporting the urolithin-A pathway—linked to mitophagy and improved mitochondrial efficiency.
- Promotes clean, stimulant-free ATP production and steadier perceived energy for long rides and pre-run bricks.
Optional AM variant — White Rabbit® Vive
- Introducing White Rabbit Shilajit Resins—our advanced shilajit infused with subtle, natural flavors and aromas for an enhanced experience… Enjoy the journey to peak performance with a touch of flavor.
- Use when you want gentle AM activation with a smoother sensory profile.
Post-session / Midday (Repair & Flow)
Muscle+ Peptide Capsules (NSF Certified for Sport®)
- Targeted peptides to support muscle regeneration pathways and reduce post-effort fatigue, helping you turn quality again within 24–48 hours.
Vascular+ Peptide Capsules
- Supports vascular tone and micro-circulation to clear metabolites and reduce between-session stiffness—useful after downhill or interval stress.
Evening (Downshift & Deep Repair)
White Rabbit® Serene shilajit Resin (PM)
- Adaptogenic evening resin to promote nervous-system downshift, sleep quality, and overnight hormonal balance so tissues actually rebuild while you rest.
Joint+ Peptide Capsules (NSF Certified for Sport®)
- Targets cartilage anabolism and connective-tissue nutrition to support knee/ankle/hip durability when volume and vert rise.
Science notes
Urolithin-A & mitophagy: our shilajit contains an increased amount of urolithin-A, which is associated with activation of mitophagy—the cell’s cleanup of damaged mitochondria—leading to improved muscle endurance, reduced fatigue, and better energy economy you can feel in long efforts.
Fulvic/humic matrix: facilitates mineral transport and redox balance that support mitochondrial enzymes involved in ATP production—useful when glycogen runs low.
Peptide signaling (Muscle+): short-chain peptides can nudge muscle protein synthesis and repair pathways, helping restore force production after eccentric loading.
Joint & ECM support (JointT+): designed to support collagen/hyaluronan dynamics and the cartilage extracellular matrix, key for runners’ repetitive load.
Vascular tone (Vascular+): supports endothelial function and flow, aiding nutrient delivery and heat dissipation on long, hot, or high-altitude days.
Sleep architecture (Serene): better parasympathetic balance at night → deeper SWS/REM → more complete muscle/connective tissue repair.
These mechanisms describe supportive physiology and are not medical claims. Always follow your physician’s guidance.
The Runner’s Stack
Protocols for athletes
Peak Block / Race Prep (4–8 weeks, road or trail)
AM: Research Grade
Midday: Muscle+ & Vascular+ (post-workout)
Why: Higher ATP demand, more eccentric damage, deeper nightly rebuild
Downhill & Ultra Defense (vert blocks, 50K–100M)
AM: Research Grade
During Block: Muscle+ & Joint+ daily
PM: Serene; add Vascular+ after long downhill sessions
Why: Protect quads/tendons, sustain output on fatigued legs, improve next-day function
Heat / Altitude / Travel Weeks
AM: Research Grade
Midday: Vascular+
PM: Serene
Plus: Immunity Max per label for race-travel resilience
Why Pürblack as a system (not just a supplement)
- Inputs → Processing → Outputs:
Minerals & shilajit resins (input) improve transport and mitochondrial processing; peptides (process) signal repair/regeneration; result (output) is more repeatable quality and less next-day cost. - AM/PM orchestration:
Activation when you need it; downshift when you must—recovery is programmed, not left to chance. - Stack synergy:
Urolithin-A–linked mitophagy + peptide-driven repair + vascular flow + sleep depth = a closed loop that supports the exact stressors runners face.
Athletes Stories
Dean Karnazes
Dean is a globally recognized American ultramarathon runner, endurance athlete, and bestselling author who has redefined the limits of human potential. He’s known for extraordinary feats such as running 50 marathons in 50 U.S. states in 50 consecutive days, completing 350 miles nonstop, racing across Death Valley in extreme heat, and running a marathon to the South Pole. A TIME “100 Most Influential People in the World” honoree and multiple award-winner in elite endurance events, including victories at the Badwater Ultramarathon and the 4 Deserts Challenge, Dean has competed on all seven continents and inspired athletes around the globe with his relentless pursuit of adventure and resilience.
In addition to his athletic legacy, he’s a New York Times bestselling author, speaker, and advocate for health, movement, and human performance. Dean has been using Pürblack shilajit resins and peptides to help with his training and recovery since 2025./products/joint-peptide
Product Uses:
Peptides: Brain PM, Brain AM, Muscle+, Joint+
White Rabbit: Vive
FAQ
No. It’s for serious runners from 5 Miles PR chasers to 100-milers—anyone stacking quality and volume.
Yes—choose Vive for a smoother sensory profile and gentle AM activation; Research Grade when you want a more neutral AM resin.
Yes—many runners do during hills/vert or race prep blocks.
Add Vascular+ for flow/thermoregulation support and consider Immunity Max for travel/race weeks.
MUSCLE+ and JOINT+ are NSF Certified for Sport®.
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Orders take 1-2 business days to process and are shipped promptly. We do not ship orders during the weekend or during US holidays.
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