Old friend hypothesis

Old friend hypothesis

Why our old friends matter For decades, bacteria were treated as something to avoid. We sanitize, disinfect and try to keep germs away. Hygiene has saved millions of lives, but it has also reduced our contact with the microbes that helped shape our immune system. This idea is central to the Old Friends hypothesis. It […]

Partnership with We The Bacteria: reimagining our relationship with microbes

For decades, we have been taught to protect ourselves from bacteria. To wash them away, disinfect them and eliminate them. But what if bacteria are not simply the problem? What if they are an essential part of the solution? YUN Probiotherapy™ is proud to partner with Expo We The Bacteria, a thought-provoking exhibition at DE […]

From Belgian biotech to international growth

What started in Belgium with a clear ambition to harness the power of microbiome science is now reaching more people across the world. Today, we are proud to share the next chapter in YUN’s international growth, together with our strong global partner Bausch Health Companies Inc. Following the launch of YUN in Poland in 2025, […]

Antimicrobial resistance is accelerating. Dermatology needs a new model.

By 2050, antimicrobial resistance (AMR) is projected to kill more people than cancer. Nearly 40 million direct deaths worldwide, with annual deaths rising sharply if current antibiotic practices continue unchecked. Dermatology is part of that story. For decades, inflammatory skin conditions have been managed through repeated antimicrobial suppression. While effective in the short term, this […]

We believe in the bacterial revolution

With six unique, globally recognized patent families, the Belgian Niel-based biotech company YUN is the only enterprise in the world to have sparked a sweeping revolution with so-called probiotherapy. Good bacteria are now being used to treat skin problems such as acne or eczema without harming the skin’s natural balance. “No one can do what […]

Why measuring microbial impact matters: inside YUN’s Microbiome Safe Scoring System

The rise of microbiome science is reshaping how we formulate, evaluate and validate skincare. As the industry moves away from antimicrobial approaches toward microbial balance, brands need transparent ways to understand how formulations affect beneficial bacteria. Not just in theory, but in measurable biological outcomes. For brands developing microbiome conscious dermatology products, this lack of […]