Beauty and the Yeast

There are, of course, food products such as crackers and crumpets (next month’s blog) that you can make with discarded sourdough starter, but also it is becoming increasingly popular as a DIY probiotic-rich skincare ingredient. This is due to the natural fermentation process that produces lactic acid and beneficial microbes. It can be used to brighten skin, reduce inflammation and a slice of bread can serve as a nourishing hair mask!

THE SCIENCE BIT

Sourdough starter contains high levels of Lactobacillus and other beneficial bacteria. These bacteria can strengthen the skin’s natural barrier, reducing inflammation and combating harmful bacteria, similar to how they work in gut health. Fermentation produces compounds that can reduce skin redness and soothe irritated skin, making it useful for managing acne or sensitive skin. 

The fermentation process in a sourdough starter produces antioxidants that help protect the skin from environmental stressors. Similar to how fermentation breaks down anti-nutrients in bread to make it more nutritious, the process increases the availability of skin-nourishing nutrients. 

Sourdough starter is naturally acidic, with a pH that often matches or supports the skin’s own slightly acidic barrier (acid mantle). This helps maintain a healthy skin environment, which is crucial for preventing infection and dryness. 

_{(While the science supports these benefits, dermatologists advise caution due to the potency of the acids. It is recommended to test on a small area first, especially for those with sensitive skin.)}

Sourdough Starter Face Mask

• Benefits: The lactobacillus in the starter helps improve the skin barrier, reduces inflammation, and acts as a gentle, natural exfoliant to brighten skin.
• How to: Apply active, bubbly sourdough starter directly to the face (avoiding eyes). Let it sit for 20 to 30 minutes before rinsing off.

Sourdough Bread Hair Mask

• Benefits: The proteins, B vitamins, and natural starches in bread nourish the scalp, strengthen hair strands, and enhance shine.
• How to: Soak a slice of sourdough bread in warm water, milk, or herbal tea (like rosemary) for 5–10 minutes. Mash it into a paste, add conditioners like honey or yogurt, apply to damp hair, and let it sit for 20–30 minutes before rinsing.
• For Oily Scalp/Dry Ends: Mix 1 slice of sourdough (soaked), 2 tbsp Greek yogurt, 1 tsp apple cider vinegar, and 5 drops of tea tree oil. 

Sourdough “Hooch” Toner Spray

• Boozy Benefits: The liquid that forms on top of a hungry starter (hooch) can be used to tighten skin before applying makeup. Simply pour off into a sanitised spray bottle and use as a skin spritz serum.

Bath Addition: Some use sourdough starter in the bath for its skin-softening properties. You can also use oats in a muslin bag that doubles up as a natural exfoliant and is excellent for treating dry itchy skin and eczema in children.

So sourdough is good for you inside and out. If you have any natural beauty tips, especially using sourdough, let us know 🙂