KEY FEATURES
A complete electrolyte powder for runners — from everyday training to race day.
Key Features
- Balanced Electrolyte Support – Sodium, chloride, potassium, magnesium and calcium to support hydration during regular training sessions and races.
- Moderate Sodium for Daily Use – 500mg sodium per serving to replace typical sweat losses without overdoing intake and risking GI issues.
- Race-Ready Formula – The perfect research-backed formulation to replace sweat loss during races, especially in hot or humid conditions.
- Neutral Taste – Helps avoid flavour fatigue during frequent use.
- Easy on the Stomach – Simple, natural formula designed for comfortable hydration before, during and after runs.
- High bioavailability - Fast absorption as marine-sourced minerals absorb faster than minerals sourced from rocks.
- Supports Sustained Performance – Helps maintain fluid balance, muscle function and energy across repeat sessions.
- Effective Hydration When Your Body is Under Stress – Designed for use when digestion and absorption are compromised at race intensity.
- Built for Long-Distance Running – Suitable for marathons, ultras and sustained efforts where hydration strategy matters.
NUTRITION
• Sodium: 9,260mg per 100g / 500mg per 5.4g serving
• Chloride: 11,315mg per 100g / 600mg per 5.4g serving
• Potassium: 3,704mg per 100g / 200mg per 5.4g serving
• Magnesium: 1,111mg per 100g / 60mg per 5.4g serving
• Calcium: 1,111mg per 100g / 60mg per 5.4g serving
• Carbohydrates: 0g per 100g / 0g per 5.4g serving
• Energy: 0kJ (0kcal) per 100g / 0kJ (0kcal) per 5.4g serving
DIRECTIONS
👉 How to Use Sustain
Sustain is designed to be flexible — easy to use in everyday training and dependable when conditions get tough on race day.
Everyday Training
Use Sustain to support hydration on regular runs, especially when you’re sweating more than usual.
• Mix 1 serving (5.4g) with 500–750ml of water. Take 1 serving mixed with water each hour of your run.
• Sip before or during runs as needed
• Ideal for:
Runs over ~60 minutes
Warm weather training
Back-to-back training days
• The neutral taste makes it easy to drink frequently without flavour fatigue.
Hot Conditions & Race Day
Use Sustain strategically when sweat losses increase and hydration becomes performance-critical.
• Mix 1 serving (5.4g) with 500–750ml of water. Take 1 serving mixed with water each hour of your race.
• Sip regularly throughout long runs, marathons, and ultras
• Adjust intake based on:
Heat and humidity
Your sweat rate
Race intensity
• Because Sustain is sugar-free, it pairs well with energy gels or real-food carbs. This helps you manage hydration and fuelling separately when it matters most.
Practical Runner Tip
There’s no single “perfect” hydration strategy. Start with a moderate approach in training, then fine-tune based on how your body responds in different conditions.
INGREDIENTS
Sustain is made using a short list of naturally sourced and sustainable ingredients, chosen for hydration performance, gut comfort, and repeat use during training and racing.
What’s Inside
• Sea Salt – Provides sodium and chloride to help replace electrolytes lost through sweat
• Coconut Water Powder – A natural source of potassium to support fluid balance
• Seawater Magnesium – Supports normal muscle function and hydration balance
• Marine Algae Calcium – Contributes to muscle function and electrolyte balance
• No unnecessary extras. Just what runners need to hydrate effectively.
What We Leave Out
• Added sugar
• Artificial sweeteners
• Artificial flavours or colours
• Gums and fillers
Designed for runners who struggle with overly sweet or heavily processed sports drinks.
Quality You Can Trust
Sustain is produced to high quality standards using carefully selected ingredients. Every batch is formulated to deliver consistent electrolyte levels, making it suitable for everyday training and demanding race conditions.
Why this matters for runners
When you’re running hard — especially in heat — digestion is under stress. A simple, clean formula helps reduce the risk of stomach upset and makes it easier to keep drinking when hydration matters most.
• IMPORTANT: Store in a cool dry place. Not recommended for children.
SCIENCE
The number and quality of research into hydration and electrolyte balance for endurance running continues to grow. We’ve summarised key findings in the following blog article:
Key Findings on Electrolytes for Runners
• Document: What Electrolytes Do You Need for Running?
• Link: https://proteinrebel.com/blogs/blog/what-electrolytes-do-you-need-for-running
The science behind Sustain
During long runs, hot conditions, and hard efforts, runners lose significant amounts of water and electrolytes through sweat — particularly sodium and chloride, alongside potassium, magnesium and calcium. Research shows that replacing electrolytes, not just fluid alone, is important for maintaining hydration, supporting muscle and nerve function, and sustaining endurance performance.
Sustain is designed around a balanced electrolyte approach, providing meaningful sodium and chloride to support fluid balance, alongside potassium, magnesium and calcium to support normal muscle function. By avoiding unnecessary sugar and artificial sweeteners, Sustain allows runners to manage hydration separately from fuelling — a strategy supported by research, especially when running intensity is high and digestion is under stress.
📚 Supporting Research
1. Replace What You Lose: Sodium Is the Primary Electrolyte Lost in Sweat
• Document: Hydration and physical performance
• Baker, L.B. (2017) – Sports Medicine
• Link: 🔗 https://link.springer.com/article/10.1007/s40279-017-0690-6
• Key Finding: Sweat sodium losses vary widely between individuals, but sodium is consistently the electrolyte lost in the greatest quantity. Replacing sodium during prolonged exercise helps support fluid balance and performance.
2. Hydration Isn’t Just About Water
• Document: Fluid and electrolyte balance in endurance exercise
• Shirreffs, S.M. et al. (2019) – Journal of Sports Sciences
• Link: 🔗 https://pubmed.ncbi.nlm.nih.gov/31007061/
• Key Finding: Replacing water alone during prolonged exercise can dilute blood sodium levels. Including electrolytes supports hydration status and reduces the risk of imbalance during endurance events.
3. Electrolytes Support Muscle and Nerve Function
• Document: Electrolytes, muscle function and exercise
• Maughan, R.J. & Shirreffs, S.M. (2008) – Scandinavian Journal of Medicine & Science in Sports
• Link: 🔗 https://pubmed.ncbi.nlm.nih.gov/18412630/
• Key Finding: Sodium, potassium, magnesium and calcium play essential roles in muscle contraction and nerve signalling, making adequate intake important during prolonged exercise.
4. Balanced Intake Matters More Than Extreme Dosing
• Document: Exercise-associated hyponatremia: updated consensus statement
• Hew-Butler, T. et al. (2017) – Frontiers in Medicine
• Link: 🔗 https://www.frontiersin.org/articles/10.3389/fmed.2017.00021/full
• Key Finding: Both excessive fluid intake without electrolytes and poorly managed electrolyte strategies can increase risk during endurance events. A balanced, individualised approach is recommended.
5. Practical Hydration Strategies for Endurance Runners
• Document: Maintaining hydration during endurance running
• Utah State University Extension (2020)
• Link: 🔗 https://extension.usu.edu/nutrition/research/maintaining-hydration-a-guide-for-endurance-runners
• Key Finding: Hydration strategies should consider duration, heat, sweat rate and individual tolerance, rather than relying on one-size-fits-all recommendations.
Why this matters for runners
Effective hydration isn’t about chasing extremes — it’s about replacing what you lose, when you lose it, and choosing strategies your body can tolerate over long durations. Sustain is built around this evidence-led approach, helping runners stay balanced, hydrated and comfortable in training and on race day.
