Cortisol is the body’s primary stress hormone. It rises in response to physical or emotional stress to help you adapt—but when cortisol stays elevated for too long, it can impair recovery, disrupt sleep, and diminish overall performance.  

After intense training, the body enters a prolonged stress state: inflammation, increased acidity, and micro-tears in muscle tissue trigger an extended cortisol response that can last 48 to 72 hours. This often results in low energy, stagnated progress, and—in more severe cases—declining muscular performance.  

KA‑EX® is designed to support cortisol normalisation through multiple pathways:  

• It contains phosphatidylserine, a clinically studied ingredient associated with supporting the regulation of exercise-induced cortisol responses; 
• It supports muscle repair and immune function with L-glutamine, and improves sleep quality with L-tryptophan, both of which help mitigate the effects of elevated cortisol.  
• By restoring optimal pH balance and replenishing muscle glycogen through a precise mix of glucose and fructose, KA-EX reduces metabolic stress and accelerates recovery.  

Together, these mechanisms help your body return to balance faster—reducing the negative impact of cortisol and unlocking better recovery, sleep, and training results.  

In three clinical studies, KA-EX was shown to accelerate cortisol normalization by 36%, improve REM sleep by 16%, and enhance heart rate variability (HRV) by 10%— resulting in more energy (9%) and an 8% mood improvement. 

KA‑EX® is designed to be taken after physical exercise or activity to support recovery. Since recovery processes last over 48 hours, many athletes also take it on rest days. 

KA‑EX® can also be taken on demanding workdays, during periods of mental fatigue, or whenever your body is under stress — whether physical or psychological. 

The recommended serving is one KA‑EX® per day, available in either sachet or bottle format. Mix one sachet with 500 ml (approx. 17 oz) of cold water, shake well until fully dissolved, and drink chilled. 

It’s true that sugar can cause a short-term cortisol spike lasting 30 to 60 minutes. However, in the context of post-exercise recovery, this effect is largely irrelevant.  

Intense physical activity elevates cortisol levels for 48 to 72 hours due to muscle damage, inflammation, and systemic stress. In comparison, the brief spike caused by sugar is minimal and does not contribute to any meaningful additional cortisol load.  

KA‑EX® contains only 18g of sugar—the same amount and type found in a regular apple (12g fructose, 6g glucose)—and is classified as “low in sugar.” Yet this small amount plays a critical role in the product’s effectiveness by enabling key recovery processes:  

• Replenishment of muscle glycogen: Glycogen is the body’s primary fuel source during exercise. Recovery requires energy, and restoring glycogen immediately post-workout is essential for proper muscle repair and performance rebound.  
• Facilitated nutrient and electrolyte absorption: Sugar acts as a transport facilitator. As glucose and fructose are taken up into muscle cells, they carry along vital co-transported substances—such as electrolytes, L-glutamine (for cellular repair), anti-inflammatory compounds, and alkaline minerals to restore optimal pH balance.  

Research shows that even when the body is adequately supplied with protein and other nutrients, the absence of sugar post-exercise can reduce recovery efficacy by up to 34%. In fact, after high-intensity training, it is often recommended to consume 60g of carbohydrates to support full recovery. 

Most sports drinks and electrolyte mixes are designed with a single goal in mind: rehydration. They typically contain water, sodium, potassium, and simple carbohydrates to replace what is lost through sweat during exercise. While these are important, they address only one dimension of what your body needs after intense physical activity. 

KA‑EX® is clinically developed and patented in Switzerland as a full-spectrum recovery formula, targeting multiple recovery pathways simultaneously: 

• Hormonal recovery: Phosphatidylserine supports regulation of the cortisol response to exercise-induced stress, helping the body return to hormonal balance more efficiently. 
• Muscle repair and immune support: L-glutamine plays a central role in muscle repair and immune function, which are compromised following high-intensity exercise. 
• Sleep and mood support: L-tryptophan is the dietary precursor to both serotonin and melatonin, supporting the sleep quality that is essential for tissue repair and growth hormone release. 
• Antioxidant defence: L-cysteine helps neutralizing the oxidative stress generated by intense exercise. 
• Energy and electrolyte restoration: A glucose and fructose combination initiates carbohydrate replenishment, alongside a full electrolyte profile supporting fluid balance, nerve conduction, and muscle contractility. 
• Micronutrient support: vitamins B6 and B12 support energy metabolism, while zinc and selenium contribute to immune defense and antioxidant enzyme activity.

In three clinical studies, KA-EX was shown to accelerate cortisol normalization by 36%, improve REM sleep by 16%, and enhance heart rate variability (HRV) by 10%—resulting in more energy (9%) and an 8% improvement in mood.