If you follow the latest foodie trends on Instagram, this probably isn’t the first time you’ve heard about blue matcha. The indigo powder is popping up in beautiful photos of teas, juices, and smoothie bowls that give off serious mermaid vibes. But you might be wondering, What exactly is it? And does it boast the same great health perks as green matcha?

Green matcha—which is made from the leaves of green tea—is loaded with antioxidants that have been tied to improved metabolism, anti-aging benefits, blood sugar regulation, blood pressure reduction, and protection against cancer and heart disease (whew). Matcha is also famous for its caffeine content and the “alert calm” it’s said to induce, thanks to a natural substance it contains called l-theanine, which promotes relaxation without drowsiness.

But apart from its name, blue matcha has little in common with the traditional stuff.