Each serving delivers 500mg of sodium alongside chloride, potassium, magnesium and calcium to support fluid balance and muscle function. The moderate sodium content is ideal for regular training and long efforts, helping you replace typical sweat losses without overdoing intake. With zero sugar and zero calories, Sustain allows you to manage hydration separately from fuelling, especially when using gels or real food during harder sessions.

The neutral, unsweetened taste is intentionally light to help prevent flavour fatigue on long or hot runs. Many runners struggle with overly sweet drinks during marathons and ultras. Sustain keeps things simple, making it easier to drink consistently when hydration really matters.

Made from naturally sourced ingredients including sea salt, coconut water powder, seawater magnesium and marine algae calcium, Sustain focuses on performance without unnecessary extras. No artificial sweeteners, no artificial colours, no fillers. Just what you need to support endurance and repeat training sessions.

When you run, especially in heat or at race intensity, you lose electrolytes through sweat. Sodium and chloride are lost in the greatest amounts, but potassium, magnesium and calcium also play important roles in fluid balance and muscle contraction. If these are not replaced appropriately, hydration status can drop and performance may suffer.

Sustain provides a research-backed balance of electrolytes to support fluid retention and muscle function without overloading the gut. The moderate sodium dose supports effective hydration, while the absence of sugar reduces the risk of stomach discomfort when digestion is already under stress. Because hydration and fuelling are kept separate, you can fine-tune your intake based on your sweat rate, race conditions and carbohydrate strategy.