02/09/2026
Collagen levels drop 1 to 1.5% every year, starting from age 20. 🧬
The causes stack up over time: sun exposure, stress on the skin, and natural aging all play a part.
Véronique Guidici, Thalgo's R&D Director, breaks down why this protein matters for skin, hair, and nails, and what actually helps slow the decline.
Watch the full explainer, link in bio.