Microbiome 101 with Sásta Skin Health

Each year on June 27th, we mark World Microbiome Day, a global reminder to celebrate the incredible, invisible world of microbes that quietly power our health. And this year’s theme, “Microbiome 101 – Everything You Need to Know,” couldn’t be more timely.

While the gut microbiome may get most of the attention, your skin has its own thriving ecosystem, made up of trillions of microbes that work day and night to protect, heal, and strengthen your skin.

So, what exactly is the skin microbiome?

Think of it as your skin’s invisible armour, a diverse, living layer of good bacteria, fungi and microorganisms. When balanced, this ecosystem helps your skin:

• Heal faster

• Resist breakouts and irritation

• Calm inflammation

• Age more gracefully

But when that balance is disrupted, by stress, harsh products, pollution, over-cleansing or over-exfoliation,  your skin lets you know. Inflammation, acne, redness and sensitivity are all signs that your microbiome might be under pressure.

A Science-Led Irish Skincare Brand with a Microbial Mission

That’s where Sásta Skin Health comes in - an Irish brand bringing skin health back to basics through microbiome-first formulations. Founded by Michelle McDonald, Sásta is rooted in the belief that supporting your skin’s natural defence system leads to long-term skin calm, clarity and confidence.

“As someone who’s spent over 25 years in the beauty industry and also as a mother, I’ve seen first-hand how disconnected we’ve become from what our skin really needs. I created Sásta to bring the focus back to skin health – to treat the skin like the living organ it is, starting with the microbiome.

We don’t need complicated routines; we need smarter, science-led solutions that work with the body, not against it. That’s what Sásta is about – creating calm, resilient skin by supporting the microbes that are already working for us.”
~ Michelle McDonald, Founder of Sásta Skin Health

The Sásta Microbiome Booster Serum

At the heart of Sásta is Sásta’s Microbiome Booster Serum, a topical supplement for your skin designed to do more than moisturise. This daily-use serum supports the skin barrier, targets inflammation, and nurtures the microbiome, helping skin to protect, repair and thrive.

🧪 What’s inside?

• Ectoin – to protect and hydrate

• Lactobacillus Ferment Lysate – to restore and balance

• Cottonbloom Extract – to nourish and calm

• Prebiotics & Postbiotics – to feed your skin’s good bacteria

Developed over three years by Michelle and co-founder Cosmetic Chemist, Brian O'Rourke, the formula is MyMicrobiome Certified - meaning it went through rigorous testing and proven not to disrupt your skin’s microbial balance.

Skincare for Skin Health (and the Planet)

Made in Ireland, Sásta is:

• ✅ 100% Irish-owned & Guaranteed Irish
  

• ✅ Focused on sustainability & long-term skin wellness, not trends

• ✅ Free from microbiome-disrupting ingredients

Even the name means something: Sásta translates to “happy” or “contented” in Irish — and that’s what we want for your skin.

This World Microbiome Day, Rethink Your Skincare

So this World Microbiome Day, we’re celebrating the tiny powerhouses that play a big role in skin health. The future of skincare isn’t more layers — it’s smarter care that works with your body, not against it.

Because sometimes, the most powerful transformations start with the smallest things.

🧡 Happy Microbiome Day from all of us at Sásta.