How do the activated charcoal and hyaluronic acid in these patches actually work together?

Hyaluronic acid is a key ingredient known for its ability to bind water, helping the under-eye and facial skin feel smoother, softer, and more supple after use. The hydrogel patch base ensures it stays in close contact with your skin for better absorption. Activated charcoal powder is included for its absorptive properties. In a leave-on cosmetic product like this, it's primarily used to help the skin feel cleaner and appear less heavy or congested, particularly in areas where you might experience excess sebum.

Together, they serve complementary functions: hyaluronic acid draws in and holds moisture at the skin's surface for a plumper look, while the charcoal may help with the immediate feeling of a fresher, less 'loaded' complexion. This makes the patches suitable not only for tired, dehydrated under-eyes but also for small zones on the forehead or elsewhere that feel dull or look tired from travel, screen time, or lack of sleep.