No.5+ Glutathione Vitamin Concentrated Serum

A glutathione and vitamin C serum that targets dark spots with synergistic power

This is the serum you reach for when you want to tackle a dull complexion and dark spots in one step. Glutathione adds luminosity to the skin, while vitamin C lifts away dullness to reveal a brighter, more even texture. With 4% tranexamic acid and 5% niacinamide, it intensively targets hyperpigmentation and uneven tone, helping to create a more uniform complexion.

Visible skin improvements confirmed after 4 weeks of use

Clinical testing showed improved hyperpigmentation after 4 weeks of use. Skin tone evenness improved by 18.90%, and the formula completed dermatologist testing and skin irritation testing with a 0.00% irritation rate. It's a gentle formulation that even sensitive skin can use with confidence.

The go-to choice for skin concerned with dark spots and dullness

With consistent morning and evening use, it effectively addresses hyperpigmentation and dark spots. When your skin looks dull, this serum restores hydration and a healthy radiance. Housed in a black glass bottle to prevent oxidation, the formula's stability is carefully protected. For amplified results, pair it with the No.5 toner pads from the same line.

After toner, before moisturizer

An ampoule is your concentrated care step, applied right after toning. Once you've cleansed and applied toner while your skin is still damp, layer on this ampoule so the glutathione and vitamin C can absorb more effectively. Follow with your moisturizer or cream to seal everything in.

Morning and evening use

In the morning, it helps wake up a dull complexion for a brighter start to your day. In the evening, it targets the fatigue your skin has accumulated throughout the day. If you use it in the morning, always finish with sunscreen — vitamin C can make your skin more sensitive to UV exposure.

One dropper for the entire face

One full press of the dropper is all you need. Dispense it into your palm, warm it slightly with your body heat, then gently press and smooth it from the center of your face outward. For areas with dark spots or hyperpigmentation, feel free to apply a second layer for targeted care.

Routine pairings by skin concern

• For dark spots and hyperpigmentation: Pair it with the No.5 Toner Pad from the same line for enhanced results
• For dullness and dryness: Seal it in with a rich, hydrating cream to lock in moisture
• For even skin tone: Use consistently for at least 4 weeks. Clinical results showed an 18.90% improvement in skin tone evenness

Ingredient notes and storage tips

Because this contains vitamin C, it's best to separate it from retinol in your routine. If you use this ampoule in the morning, save your retinol for the evening. The dark glass bottle is designed to protect against oxidation, but storing it in a cool place away from direct sunlight will help keep it fresh even longer. This product is dermatologist-tested, but if you experience redness or discomfort, discontinue use and consult a skincare professional.

The list of ingredients is subject to change. Please consult the packaging of the product purchased.