The Yséline Journal
Where phytochemistry meets folklore. A space for the curious, the careful, and the committed to understanding their skin.
Latest Articles
The Science
The molecule that makes trầu không work
12 November 2024 · 8 min read
For centuries, Vietnamese healers applied betel leaf to wounds. Today, phytochemists are confirming what those healers knew intuitively.
Read ArticleIndochina Heritage
The French botanists who fell in love with Đông Dương
5 November 2024 · 12 min read
Pressed leaves and handwritten field notes from 1880s Indochina laid the foundation for everything Yséline does today.
Read ArticleSkin School
Niacinamide vs Zinc PCA — understanding the difference
28 October 2024 · 6 min read
Knowing which one your skin actually needs could change everything about your routine.
Read ArticleRitual & Routine
Why slowing down is the most effective thing for your skin
20 October 2024 · 5 min read
Modern skincare culture rewards speed and complexity. The most transformative skin changes happen when you give a single product time.
Read ArticleThe Yséline Letter
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