Our Formula

Our bath tonics have been formulated to maximise the transdermal ("through the skin") absorption of natural magnesium while bathing.

The minerals in our bath tonics are in a concentrated liquid form, allowing us to include ingredients that also soothe, soften, hydrate and care for your skin. Our tonics and scrubs are formulated to leave your skin feeling and smelling wonderful!

All of our products use only natural ingredients found in plants and in the earth. They are vegan friendly and are not tested on animals. They can be safely used by all skin types and ages.

We at 39 Degrees believe bathing offers the opportunity for everybody to reclaim their personal space and to consciously take the time to care for both mind and body: Shut the door, turn off your smartphone, slip into mineral-rich 39°C water and disconnect from the stresses of life.

Our Ingredients

Natural Magnesium Chloride

Our magnesium chloride is sustainably sourced from the ancient Zechstein seabed in the Netherlands, the world's purest source of natural magnesium chloride.


The glycerin in our products is completely natural, palm-free and vegan friendly.

Glycerin is important to the cosmetics industry for different reasons. In a similar way to honey, this clear, viscous liquid absorbs free water into its structure, creating an inhospitable environment for microbes and making it an ideal substitute for water in products. Glycerin also has softening, hydrating properties on the body and the ability to carry ingredients onto the skin where their benefits can be utilised.

Helianthus Annuus Oil

Helianthus Annuus oil is extracted from the seeds of the sunflowers and sunflower oil is a clear, slightly amber-colored liquid. With high amounts of Vitamins A, B, D, E and Beta-carotene, it helps improve your skin’s moisture retention capacity for healthy skin. It is particularly beneficial for individuals with dehydrated or sensitive skin.

Cocamidopropyl Betaine

Naturally derived from the fatty acids of coconut oil, cocamidopropyl betaine is a very mild and versatile compound. As a surfactant, it gently washes the skin. It's also a good thickener and emulsifier, helping water and oil to mix. The cocamidopropyl betaine in 39 Degrees products is completely natural, palm-free and vegan friendly.

Polyglyceryl-10 Laurate

The Polyglyceryl-10 Laurate used in 39 Degrees products is glycerine-derived from coconuts. Polyglyceryl-10 Laurate is skin and eye friendly, and helps to clean sweat and dirt from your skin while also softening it. Due to its ability to keep water and oil mixed, it also functions as an emulsifier, helping to give products a good texture. It is vegan and completely natural.

Sambucus Nigra

Sambucus Nigra Fruit Extract is also know as black elderberry, and belongs to the honeysuckle family. It is a medium to dark amber liquid. Its composition of flavonoids and various polyphenol compounds makes it high in antioxidants. Due to this, it has exceptional soothing, moisturising and calming effects on your skin.

Pure essential oils

39 Degrees essential oils are 100% pure and natural. Essential oils are aromatic compounds found in seeds, bark, stems, roots, flowers and other parts of plants. They are powerful and fragrant. Our liquid magnesium bath tonics come in four different essential oil aromatherapy blends to relax, replenish and rejuvenate. Read more about our aromatherapy blends here.

Our Motherhood bath tonic contains only those essential oils considered safest during the whole of pregnancy and during breastfeeding according to the National Association for Holistic Aromatherapy's recommendations and the International Federation of Professional Aromatherapists Pregnancy Guidelines.