R.E.S.T. Science & Research

R.E.S.T. Restricted Environment Stimulation Therapy

Also known as Sensory Deprivation, Isolation Therapy

aka Floating

People often ask about why the water is buoyant and why they don't sink, also, how much Epsom Salt we add to the water to give it 

Epsom salt

Epsom Salt or its proper scientific name is Magnesium Sulfate MgS04 has been used for thousands of years for health and wellness and medicinal benefits. Recorded in ancient times by the Romans, Egyptians


The story is that in 1618 during a dry summer Henry Wicker found on Epsom Common a source of water, which his cattle refused to drink. This water proved to have medicinal properties, first used externally to cure sores but later found to be a purgative when drunk. So Epsom rapidly became a prosperous health resort: a spa.


 Each pod is filled with half a tonne of Epsom salt. It has been used for centuries for its medicinal qualities, and offers many health benefits when used for floating.

Benefits of Epsom salt

Epsom salt, also known as magnesium sulphate, is the magic ingredient in our pods which allows you to float effortlessly in the water. Epsom salt has been used therapeutically for hundreds of years after being discovered in an underground spring in Epsom, Surrey.

People report a number of health benefits relating to the high magnesium content, including:

Improved skin and hair – including improved skin elasticity and moisture, reduced acne and allergies, and glossier hair.

Reduced muscle pain, cramping and headaches – as a result of flushing toxins and heavy metals from the cells.

Better regulated blood sugar – as magnesium improves the body’s ability to use insulin, which controls glucose levels.

Improved sleep – as magnesium deficiency can be a key indicator of poor sleep.

You don’t have to float to reap the benefits of Epsom salts. Even a few handfuls into a warm bath can have amazing benefits. Ask a member of our team if you’re interested in taking some home!

How Magnesium Can Help You Sleep


Many people have trouble sleeping, and breaking the cycle of insomnia can be hard.

You can try changing your sleep routine and curbing your caffeine intake, but sometimes these lifestyle interventions fall short.

Supplements are another popular option. One supplement that’s gained some attention as a potential sleep aid is magnesium.

This mineral has wide-ranging effects in the body and may influence some of the processes that promote sleep.

Read on to learn the connection between magnesium and a good night’s sleep.


What Is Magnesium?

Magnesium is one of the most common minerals on earth and is present in many foods (1Trusted Source, 2, 3Trusted Source).

It’s essential for human health and is used in over 600 cellular reactions throughout your body (3Trusted Source).

In fact, every cell and organ need this mineral to function properly. It contributes to bone health, as well as proper brain, heart and muscle function (3Trusted Source).

Magnesium supplements have been linked to a number of benefits, including fighting inflammation, relieving constipation and lowering blood pressure (4Trusted Source, 5Trusted Source).

In addition, magnesium may help treat sleep problems.

Many types of magnesium supplements are available. These include magnesium citrate, magnesium oxide and magnesium chloride.


Magnesium is an important mineral that is necessary for overall health. Benefits of these supplements range from fighting inflammation and lowering blood pressure to possibly improving sleep.


It Can Help Your Body and Brain Relax

In order to fall asleep and stay asleep, your body and brain need to relax.

On a chemical level, magnesium aids this process by activating the parasympathetic nervous system, the system responsible for getting you calm and relaxed (6Trusted Source).

First, magnesium regulates neurotransmitters, which send signals throughout the nervous system and brain.

It also regulates the hormone melatonin, which guides sleep-wake cycles in your body (7Trusted Source).

Second, this mineral binds to gamma-aminobutyric acid (GABA) receptors. GABA is the neurotransmitter responsible for quieting down nerve activity. It is the same neurotransmitter used by sleep drugs like Ambien (8Trusted Source, 9Trusted Source).

By helping to quiet the nervous system, magnesium may help prepare your body and mind for sleep.


Magnesium helps activate neurotransmitters that are responsible for calming the body and the mind.


Not Having Enough of It Interferes With Sleep

Not having enough magnesium in your system can cause troubled sleep and even insomnia (10Trusted Source).

Studies in mice have shown that optimal levels of this mineral are needed for normal sleep and that both high and low levels can cause sleep problems (11Trusted Source).

Certain groups of people have a higher risk of magnesium deficiency, including (2):

  • People with digestive diseases: Issues with your digestive tract can cause your body to not absorb vitamins and minerals properly, resulting in deficiencies.

  • People with diabetes: Insulin resistance and diabetes are linked with excess magnesium loss.

  • People with alcohol dependence: Deficiency in this mineral is common among those who drink heavily.

  • Older adults: Many older adults have less magnesium in their diets than younger adults and may also be less efficient at absorbing it.

If you’re not getting enough magnesium, then you may experience sleep problems.


Insufficient magnesium intake is linked to sleep problems. Some populations are particularly at risk of deficiency.

Find out more facts

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