Every formula is crafted at the Tatcha Institute in Tokyo, where leading scientists innovate within tradition: balancing timeless Japanese botanicals with proven clinical ingredients to work with the skin, not against it. Inside every Tatcha formula lives a tiny symphony of superfoods, amino acids, and AHAs called Hadasei-3™. This proprietary complex of twice-fermented rice, green tea, and algae is rooted in the nutrient-dense Japanese diet, largely considered the healthiest in the world.