OUTPERFORM
YESTERDAY

KA-EX is the first product worldwide that significantly lowers cortisol levels within 48 hours, enhancing your sleep, energy, muscle growth, and endurance.

Try the Cortisol Stress Reducer

IMPROVE
YOUR
CORTISOL
LEVELS

-36%

reduction of cortisol
(stress hormone)
within 48hours*

What’s Cortisol?

Cortisol is the body’s primary stress hormone, and elevated levels can hinder muscle repair, immune function, and sleep quality. Monitoring cortisol helps gauge recovery, as balanced levels support recovery, energy regulation, and overall resilience.

5 years of scientific research. Backed by 3 clinical trials.

The World’s First Fast-Acting Cortisol Stress Reducer.

-36%

reduction of cortisol (stress hormone) within 48hours*

+15%

improved REM sleep**

+10%

improved HRV patterns**

+9%

increased daily energy**

-4%

lower resting heart rate**

Alt image
Alt image

The World’s First
Fast-Acting
Cortisol Stress
Reducer

The World’s First
Fast-Acting
Cortisol Stress
Reducer

For Athletes & High-Performers

For Athletes & High-Performers

Reduce your Cortisol Stress

Mix 1 sachet with cold water. Shake well. Drink & enjoy post workout.

How to Use:

Drink KA-EX® after every workout and 
on rest days.

KA-EX® is produced with the highest quality ingredients

KA-EX® is produced with the 

highest quality ingredients

We use only the highest quality ingredients. Our producers are certified and regularly inspected by the authorities. Very importantly, each unit is packed light- and air-tight in an aluminium bag. This ensures the lasting quality of the vitamins.

4.5 Stars From Hundreds Of Reviews

KA-EX® 24-pack

$49.99

Price per Serving

$2.08

buy on amazon

KA-EX® 3-pack

$7.99

$9.99

Price per Serving

$3.33 $1.99

buy on amazon

KA-EX® Welcome Box

$49.99

5x 3-pack 

(15 servings)

Title

Price per Serving

$3.33

Title

Glas shaker

FREE

Title

KA-EX® 24-pack

$49.99

Price per Serving

$2.08

buy on amazon

KA-EX® 3-pack

$7.99

$9.99

Price per Serving

$3.33 $1.99

buy on amazon

KA-EX® Welcome Box

$49.99

5x 3-pack 

(15 servings)

Title

Price per Serving

$3.33

Title

Glas shaker

FREE

Title

4.5 Stars From Hundreds Of Reviews

Ingredients & Supplement Facts 

Electrolytes

magnesium, 109 mg (*29%)

calcium, 267 mg (*33%)

potassium, 578 mg (*29%)

sodium bicarbonate, 600 mg

Amino acids

L-cysteine, 250 mg

L-tryptophan, 67 mg

L-tyrosine, 417 mg

l-glutamine, 2500 mg

Bioactive substances

phosphatidylserine, 100 mg

betaine, 417 mg

choline, 100 mg

Functional sugars

fructose, 12 g

glucose, 6 g

Vitamins and micronutrients

selenium, 17 μg (*30%)

zinc, 4 mg (*43%)

niacin, 13 mg (*83%)

pantothenic acid, 4 mg (*83%)

riboflavin, 1.17 mg (*83%)

thiamine, 5mg (*83%)

vitamin B6, 1.17mg (*83%)

vitamin B12, 2.5 μg (*100%)

vitamin C, 80mg (*100%)

vitamin E 10mg (*83%)

folate, 167 μg (*83%)

Caloric value

calories, 85 kcal, (*4.25%)

from sugars, 72 kcal, (*3.60%)

from protein, 13 kcal, (*0.65%)

fat 0

KA-EX powder and KA-EX GO

Formulated by Science. Trusted by Champions, Trainers, and Nutritionists

Trusted By

The Person & Story Behind KA-EX®

Trusted by thousands of elite athletes and high performers worldwide, KA-EX® is the creation of founder Pedro Schmidt, a pharmacy graduate from ETH Zurich—the same university as Albert Einstein. Backed by oncology and pharmaceutical expertise, KA-EX® is clinically proven to lower cortisol, improve sleep, and support HRV. Launched in Switzerland in 2017 and awarded Innovator of the Year in 2023 and 2025, it’s now available in the U.S. through Amazon.

Your questions - Our answers

What Is Cortisol Stress — and Why Does KA-EX® Work?

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 counteract cortisol stress through multiple pathways: 

  • It contains phosphatidylserine, a clinically studied ingredient shown to reduce cortisol levels directly. 
  • It supports muscle repair 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% improvement in mood. 

Sugar is known to lead to a cortisol spike, why does KA-EX® contain sugar?

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. 

What does KA-EX® taste like?

KA‑EX® has a light, refreshing citrus flavor with a clean finish. The slightly salty note comes from its natural electrolyte content — it’s not overly sweet or artificially flavored.

Does KA‑EX® have any side effects?

KA‑EX® is generally well tolerated, and no side effects have been reported after millions of servings sold in Switzerland. People with sensitivities to certain vitamins or minerals should still assess individual tolerance. If you have known intolerances or medical conditions, we recommend consulting a healthcare professional before use.

Is KA‑EX® vegan, gluten-free, and lactose-free?

Yes — KA‑EX® is 100% vegan, gluten-free, and lactose-free.

How do I mix KA‑EX®?

Mix one sachet with 500 ml (approx. 17 oz) of cold water. Shake well until fully dissolved. For best results, drink chilled.

When should I take KA‑EX®?

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. It can also be helpful after mentally or physically stressful days.

Can I take KA‑EX® even if I’m not working out?

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

Is KA‑EX® clinically tested?

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. 

Can diabetics take KA‑EX®?

KA‑EX® contains 6 g of glucose and 12 g of fructose per serving — similar to the sugar content of an average apple. Diabetics should account for this in their insulin or dietary management and consult with a healthcare provider if unsure.

Can KA‑EX® be taken during pregnancy or breastfeeding?

There are no known concerns, but KA‑EX® contains several vitamins (e.g. folate, B12, C) that might already be supplemented elsewhere. It’s important not to exceed daily recommended intake. Please consult a doctor before use during pregnancy or breastfeeding.

What’s the minimum age for taking KA‑EX®?

KA‑EX® is recommended for individuals aged 13 and older. Younger individuals have different nutritional needs, and supplementation should only be done under professional guidance.

Does KA‑EX® contain caffeine or stimulants?

No. KA‑EX® is 100% free from stimulants like caffeine or taurine. Instead, it contains natural ingredients that support recovery, sleep, and overall well-being without disrupting cortisol or sleep cycles.

Is there more than one flavor or version of KA‑EX®?

Currently, KA‑EX® is only available in its original formulation and citrus flavor.

How is KA‑EX® different from a regular sports drink or electrolyte mix?

KA‑EX® is clinically developed and patented in Switzerland. It goes far beyond basic electrolytes by including cortisol-lowering bioactives (like phosphatidylserine), amino acids (like L-tryptophan for sleep), antioxidants (like L-cysteine), and functional sugars to restore glycogen. It’s a full-spectrum recovery solution.

Are the powder sachets and the push-cap bottles the same formula?

Yes — both formats contain the same functional ingredients in the same dosage. The only difference is in the separation of certain components for stability in the bottle.

How often can I take KA‑EX®?

The recommended serving is one KA‑EX® (sachet or bottle) per day.