Before you toss the dry, papery skins of onions and garlic into the trash, consider this: these often-discarded layers are packed with antioxidants, antimicrobial compounds, and beneficial plant chemicals. When simmered in water, they create a simple, nourishing tea that has been used for generations to support immunity, soothe coughs, and even strengthen hair.

Purple onion skins are rich in quercetin, a powerful antioxidant that helps reduce inflammation and support respiratory health. Garlic skins contain allicin and other sulfur compounds that have natural antimicrobial properties. Together, they create a decoction that can be used both internally and externally.

The Onion & Garlic Skin Decoction

What you need

• The dry outer skins of 2 to 3 purple onions
• The dry outer skins of 1 head of garlic
• 4 cups water

How to make it
Gently rinse the onion and garlic skins to remove any dirt. Place them in a small pot. Add the water. Bring to a boil over medium heat. Reduce the heat to low and let it simmer for 15 to 20 minutes. The water will turn a deep amber or reddish-brown color. Remove from heat. Let it cool slightly. Strain the liquid through a fine strainer into a mug or jar, discarding the skins.

How to use it

• As a tea: Drink ¼ cup of the warm decoction once or twice daily to support your immune system, especially during cold season. You can add a teaspoon of honey or a squeeze of lemon for taste.
• As a hair rinse: After shampooing, pour the cooled decoction over your hair and scalp. Massage gently, leave it on for 5 minutes, then rinse. This can help strengthen hair and reduce dandruff.
• As a skin toner: Apply the cooled liquid to your face with a cotton ball. It may help reduce inflammation and even out skin tone.

Why this works

The skins contain a higher concentration of certain antioxidants than the flesh of the onion or garlic. When simmered, these compounds are released into the water, creating a nutrient-rich liquid that can be used in multiple ways.

What you might notice

With regular use, many people report fewer colds, healthier-looking hair, and calmer skin.

Important safety note

Wash the skins thoroughly before using to remove any dirt or pesticide residues. If you have a known allergy to onions or garlic, avoid using this decoction.

A simple, zero-waste habit

Onion and garlic skins – something you would normally throw away – can become a valuable part of your wellness routine. This simple decoction turns kitchen scraps into a nourishing tea and rinse.

If you’re looking for more ways to use everyday ingredients for natural wellness, check out this post on a Red Onion Neck Compress, or for a different kind of glow, try this Vaseline & Baking Soda trick for soft skin.