Epsom Salt (Magnesium Sulphate)

Epsom salt, chemically known as magnesium sulphate, is a naturally occurring mineral compound composed of magnesium, sulphur, and oxygen.
Unlike table salt, Epsom salt is not used for seasoning food.
Instead, it has a long history of use in bathing and topical applications due to its magnesium content and high solubility in water.
When dissolved, Epsom salt releases magnesium and sulphate ions, which are readily absorbed through the skin.
What is Epsom Salt?
Epsom salt is the common name for magnesium sulphate heptahydrate, a mineral compound first discovered in the town of Epsom, England.
It appears as colourless crystals that dissolve easily in warm water.
Magnesium is an essential mineral involved in hundreds of biochemical processes in the human body, including:
- Muscle function
- Nerve signalling
- Energy production
- Electrolyte balance
How Epsom Salt works in the body
When Epsom salt is dissolved in warm water and used in baths or foot soaks, magnesium may be absorbed transdermally (through the skin).
This process is commonly used to support:
- Sleep
- Muscle relaxation
- Recovery after physical exertion
- General relaxation and wellbeing
The warmth of the water also promotes circulation, which may enhance comfort and relaxation.
Common uses of Epsom Salt
Epsom salt is commonly used for:
- Bathing and soaking
- Muscle relaxation after exercise
- Foot soaks
- General relaxation rituals
It is often chosen by individuals seeking a non-oral way to support magnesium intake.
Epsom Salt compared with other magnesium forms
Magnesium is available in many forms. Epsom salt differs in several key ways:
- Compared to magnesium citrate or glycinate: Epsom salt is primarily used topically rather than orally.
- Compared to magnesium chloride flakes: Epsom salt has a higher sulphate content and a long history of bath use.
- Compared to dietary magnesium supplements: Epsom salt bypasses the digestive system.
Each form has different applications depending on individual needs and preferences.
Is Epsom Salt safe?
Epsom salt is generally considered safe when used as directed for external applications.
It is recommended to:
- Follow dilution instructions
- Avoid use on broken skin
- Consult a qualified health practitioner if pregnant, unwell, or managing a medical condition
Where to buy Epsom Salt
Epsom salt is available as a standalone mineral product suitable for bathing and topical use.
Disclaimer
This page is provided for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.