medicube AGE-R Glutathione Glow Serum is a large-volume brightening ampoule with a high concentration of glutathione (50,000 ppm, brand-listed 99.4% purity) plus niacinamide, adenosine, and collagen, to help skin look brighter, more even, and more radiant.

Why you'll love it

• Brightening and smoothing look: Helps the look of dark spots, uneven tone, firmness, and skin texture.
• Fast-absorbing, non-sticky: A refreshing texture with no artificial coloring (a natural yellow hue).
• Dropper design: Convenient to use; pairs with the medicube Booster Pro device.

With consistent use for over a month, the brand says skin can look brighter and more luminous. Results vary.