What does the name Kalter Bruder® stand for?
The name Kalter Bruder® (Cold Brother) stands for our intensively cooling gel, developed by twin brothers with restless legs from Lüneburg, Germany.
With its unique combination of antispasmodic/pain-relieving medicinal plants and a long-lasting, profound cooling effect, Kalter Bruder® provides noticeable relaxation for restless legs, polyneuropathy and joint problems.

Can't keep still
An estimated 40 to 70 million people in Europe suffer from restless legs syndrome (RLS), making sleep a struggle. When the body wants to rest, tingling sensations in the arms or legs appear, turning the night into a nightmare. Scientists are increasingly investigating the causes of this neurological disorder, which is thought to result from a combination of genetic and environmental factors. A common finding is dysfunction in the brain’s dopamine metabolism, disrupting the neurotransmitter responsible for regulating movement.
While the direct health effects of RLS are unclear, the indirect consequences of chronic sleep deprivation can severely impact quality of life and life expectancy. Many sufferers endure years of discomfort,...

-
Keeps you cool & relaxed through the night
-
Supports your body in self-healing in cases of restless legs, polyneuropathy, joint pain and sports injuries.
-
Perfect for your everyday life: easy application and good skin compatibility combined with quick relief.
-
Helps or money back: test the effect in your everyday life for 90 days.

Kalter Bruder® – Relax 500ml 500.0ml | 106,00 € / l
Success speaks for itself: In hundreds of comments, you’ll find stories of how Kalter Bruder® has helped people who had already tried everything else. The unique formula, crafted from various medicinal plants, can transform your daily life too – give it a try!
Learn moreRESTLESS-LEGS (RLS) SURVEY: FOCUSING ON TREATMENT METHODS
A survey of 300 particularly affected RLS patients shows what helps and what doesn’t.
Where do you feel the tingling sensation?
327 of 327 people answered this question
How long have you had RLS?
327 of 327 people answered this question
When do you have the symptoms?
327 of 327 people answered this question
How often do you have restless legs/arms?
327 of 327 people answered this question
How much does RLS affect your sleep and quality of life?
327 of 327 people answered this question
What medications do you take?
327 of 327 people answered this question
What do you think about tablets in general?
327 of 327 people answered this question
What else do you do?
327 of 327 people answered this question
And which of these helped?
327 of 327 people answered this question
What have you tried already?
327 of 327 people answered this question

RELAXATION THROUGH COOLING
The application of cold to restless legs has interesting effects on the nervous system that can help alleviate symptoms. To understand how this works, it helps to look at the body's physiological responses to cold. So what happens to the nerves when cold is applied?
Slowing of nerve conduction velocity:
Cold slows the transmission speed of nerve impulses. In the extremities, this can reduce unpleasant sensations such as tingling, burning or pain. The nerves are less ‘reactive’, which can lead to a certain calming of the symptoms.
Reducing the inflammatory response:
Although inflammation is not necessarily a primary factor in RLS, an accompanying inflammatory response in the legs can contribute to symptom intensification....
This is where our Kalter Bruder® Relax gel makes a difference. Specially formulated for a long-lasting cooling effect, its unique recipe harnesses the fresh gel of the aloe vera plant and arnica, both known for their anti-inflammatory and soothing properties. Key ingredients like menthol and camphor enhance the cooling effect, helping to relieve pain and reduce swelling.
Kalter Bruder® offers a practical and efficient way to leverage the benefits of cold therapy. Its cooling effect delivers gentle, consistent deep cooling without harming the skin or restricting mobility.
THE NATURAL POWER OF KALTER BRUDER®
This unique composition is one of a kind: Our secret formula is specially developed for people with nerve, joint and muscle issues. We harness the power of nature to support your body’s self-healing process. No magic, no frippery. Simply natural.
THE NATURAL POWER OF KALTER BRUDER®
COOLS
The deep cooling effect relaxes your muscles and activates your body's natural regeneration process.
BOOSTS CIRCULATION
Increased blood flow allows harmful substances to be removed more effectively, which accelerates the healing process.
SOOTHES
The medicinal plants have anti-inflammatory properties that can relieve pain and calm nerves.
GIVE YOUR BODY THE REST IT DESERVES.
BUY NOW
Let customers speak for us

The vicious circle of pills – an interview with Kalter Bruder® founder Carsten
Carsten, what motivated you to found Kalter Bruder®?
"I have been suffering from restless legs for about 10 years and at some point I was prescribed tablets that are often used for RLS. However, the side effects were so severe that I had to stop taking them. Since then, I have been asking myself what natural alternatives there are, not only for restless legs."
What is your general opinion on current treatment methods for age-related illnesses?
"The vast majority of customers who try Kalter Bruder® have already taken tablet. There is a reason why these often very desperate people are looking for alternatives to conventional medicine. Whether you suffer from chronic nerve,...

TRUE BROTHERLY LOVE
We are Carsten and Stefan - twins from Lüneburg. We ourselves suffer from RLS and founded Kalter Bruder® to offer an alternative to conventional medicine. With our gel, we’ve truly struck gold. In our magazine, we share insights from studies, provide nutrition and exercise tips, and uncover what you absolutely need to know.