Melanin and follicle stem cells: Hair gets its colour from melanin, a pigment produced by specialised cells in the hair follicle. As we age, the stem cells that replenish these pigment-producing cells gradually die off or become inactive. With fewer cells making melanin, hair grows out grey or white. The process isn’t sudden; each strand cycles between colour and reduced pigment before eventually turning fully grey.

Genetics and early greying: Genes play a major role. Family history often predicts when a person will start greying. Certain populations tend to grey earlier than others, and some inherited conditions can accelerate the process. While vitamin deficiencies and smoking can influence hair colour, genetics is by far the strongest factor.

Stress and the immune system: Recent studies suggest chronic stress can accelerate greying by damaging pigment-producing stem cells in the follicle. Stress hormones, like cortisol, seem to push these cells into overdrive until they burn out. Interestingly, the immune system may also play a role: some autoimmune conditions cause sudden, patchy greying.

How Stress Causes Gray Hair

Premature Graying of Hair

📈 Bond Market Politics: Ever feel like unelected financiers have more say over your country's budget than your own vote? This article explains exactly how government borrowing works, why rising bond yields can spike your mortgage and pensions, and how the bond markets famously toppled Liz Truss in just 45 days. A must-read if you're interested in Economics or Politics.

🗿 Ireland’s First People: Who were the first humans to set foot on the Emerald Isle, and how did they shape the island we know today? This deep-dive weaves together archaeology, ancient DNA, and even mythology to tell the story of Ireland's earliest inhabitants. It explores the Ice Age hunters and Mesolithic foragers, as well as the Neolithic farmers who built Newgrange and Bronze Age newcomers who reshaped the population's genetics. Great if you’re interested in Archaeology or History!

❤️ The Philosophy of Romeo and Juliet: This podcast walks you through the story of Romeo and Juliet backwards, exploring what Shakespeare added to the original tale (hint: lots of stabbing), and unpacking fascinating scholarly takes on the "religion of love" versus Christian morality. It asks whether those impulsive teenagers were actually reckless or just the only ones brave enough to live authentically. A top-tier listen if you're into Philosophy or English Literature!

Wednesday 22nd July

Thursday 23rd July