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What are Hydrosols? (Plus Tips for Using Them!)

Are you a label reader? We hope you are – whether it’s your food or your skincare, ingredients matter. If understanding what they are make you feel like you need a science degree (or two), you’re not alone. A lot of even simple ingredients come with fancy sounding names, like hydrosol. What is this ingredient, and why is it in your (and our!) skincare products? It’s not as fancy as it sounds, actually.

A hydrosol is a botanical water usually made with flowers, but any botanical will work, like leaves, fruits, barks, or other plant material. Unlike essential oils – the pure, concentrated essence of a botanicals — hydrosols are mostly water.

These dilutes typically contain less than one percent (usually 0.01 – 0.04 percent) of the essential oil. A plant that contains more water naturally will be less concentrated than a denser ingredient.

Essential oils, if you’re not familiar, are extracted from a plant through various means. These highly concentrated oils are extremely potent (thus the reason they come via such small bottles). A little goes a long, long way. Not only are they usually fabulous to smell, but they’re most often recommended to be diluted via a carrier oil. While hydrosols aren’t oils, they are by definition, already diluted.

You can compare hydrosol to a diluted herbal tea. But even though a cup of ginger tea is less potent than a whole ginger root, it’s still got much of the root’s potent benefits, which is why hydrosols are often found in skincare instead of just plain water. It’s like a naturally enhanced water that is both hydrating and medicinal, delivering a boost of plant nutrients, be they anti-inflammatory effects, toning properties, wound-healing, calming, or rejuvenating aspects. You’ve got this perfectly useful water that’s going to do great things for your skin.

Because hydrosols are less concentrated than pure essential oils, they’re also less likely to irritate the skin or cause allergic reactions when used in a product or on its own.

If you’re a fan of essential oil fragrances, you’ll still pick up notes of the botanical in a hydrosol, but it will be less potent, and may have a greener or grassier scent more like the botanical would smell in your garden.

While hydrosols are often used in skincare products, they can be used on their own as a skin toner or as an aromatherapy spray. Still — be sure to read the label on your hydrosols to make sure it’s a clean and natural product.


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