What is Yon-Ka Serum C20 and who is it for?

Yon-Ka Serum C20 is an intensive vitamin C serum formulated with 20% stable vitamin C and 99.9% natural ingredients. It suits all skin types, including sensitive skin, and is ideal for anyone looking to visibly reduce signs of aging, fade pigmentation spots, and achieve a more radiant, even complexion — all within a short treatment period.

How do I use Yon-Ka Serum C20 in my routine?

Apply 6-8 drops of Yon-Ka Serum C20 to clean face and neck every morning. For an intensive 10-day flash treatment, also use it in the evening. If you have oily skin, 4 drops are enough. You can use it alone or layer it under your regular moisturizer, and it's safe to use even on days with sun exposure.

What does Yon-Ka Serum C20 actually do for my skin?

Yon-Ka Serum C20 delivers visible results within just 5 days: a more luminous complexion, a more even skin tone, and a noticeable reduction of wrinkles and pigmentation spots. The 20% stable vitamin C stimulates collagen production, while turmeric and pomegranate cells provide antioxidant protection against free radicals and support firmer-looking skin.

Which key ingredients make Yon-Ka Serum C20 effective?

Yon-Ka Serum C20 combines 20% stable vitamin C with antioxidant turmeric cells, radiant pomegranate cells, and organic apricot oil rich in vitamin A. Vitamin A promotes cell renewal to improve skin structure, while sweet orange oil adds an invigorating boost. The Yon-Ka Quintessence enhances the effectiveness of all active ingredients for optimal anti-aging results.

Will Yon-Ka Serum C20 feel heavy or greasy on my skin?

Not at all — Yon-Ka Serum C20 has a lightweight texture that absorbs quickly without leaving any greasy residue. This makes it comfortable for daily morning and evening use across all skin types. Because it layers easily under your usual cream, it fits seamlessly into any existing skincare routine without adding heaviness.

Why choose Yon-Ka Serum C20 over other vitamin C serums?

Yon-Ka Serum C20 stands out with its high 20% concentration of stable vitamin C combined with 99.9% natural ingredients — a rare combination in the market. The formula is designed for visible results within 5 days and is gentle enough for sensitive skin. The added Yon-Ka Quintessence boosts ingredient efficacy, making this serum a powerful yet skin-friendly anti-aging choice.

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Yon-Ka Serum C20 - 5ml

Yon-Ka Serum C20 (5 ml) is the intensive vitamin C sérum from the Intensive line: 20% stable vitamin C for a visibly more radiant, even and firmer-looking complexion. Ideal as a 10-day flash cure.

Contents: 5 milliliter (ml)

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€47.50

Available
Shipped within a few working days

Key features

Leaves skin glowing
Vegan
Anti-aging
At least 95% natural.

Description

Does your complexion look dull, with dark spots and first fine lines becoming more noticeable? Yon-Ka Serum C20 is the concentrated vitamin C sérum from the Intensive line, with 20% stable vitamin C and 99.9% ingredients of natural origin. The 5 ml size is perfect for a 10-day flash cure: a short, intensive boost when your skin looks tired, after summer, at the end of winter or just before a special occasion.

How it works

At the heart of the formula is ascorbyl tetraisopalmitate, a stable, oil-soluble form of vitamin C that visibly brightens and evens the complexion. Antioxidant turmeric cells (Curcuma longa callus extract) and radiance-boosting pomegranate cells (Punica granatum leaf cell extract) support this action, while organic apricot kernel oil, rich in vitamin A, leaves skin supple and firmer looking. Sweet orange oil adds an invigorating lift. The signature Quintessence complex of five essential oils – lavender, geranium, rosemary, cypress and thyme – is present too.

Texture and use in your routine

The texture is light and oil-like, absorbing quickly without a greasy finish; the scent is fresh and citrussy with the typical Yon-Ka aromatic signature. Apply in the morning to cleansed skin, after Lotion Yon-Ka PS or PNG and before your usual cream, such as Hydra N°1 Crème or Elastine Jour. For an intensive cure, use it in the evening as well. Oily skin needs only 4 drops.

Frequently asked questions

Which skin type is Serum C20 for?

All skin types looking to address dullness, dark spots or fine lines. If your skin is sensitive, apply to a small area first and build up gradually.

How do I combine it with the Lotion and my cream?

Cleanse, mist on Lotion Yon-Ka PS or PNG, then apply 6-8 drops of Serum C20 to face and neck and finish with your usual Yon-Ka cream.

How long does 5 ml last?

Used daily at 6-8 drops, 5 ml is designed to cover a cure of around ten days, making it ideal as a travel size too.

Operation

Serum C20 combines 20% stable vitamin C (ascorbyl tetraisopalmitate) with antioxidant turmeric cells and pomegranate cells. Together they help brighten the complexion, visibly fade pigmentation spots and protect the skin against everyday influences that leave it looking dull. Organic apricot kernel oil, rich in vitamin A, keeps skin supple and firmer looking while visibly softening fine lines. Sweet orange oil and the Quintessence complex of five essential oils create the invigorating, aromatic experience typical of Yon-Ka.

Application

In the morning, apply 6-8 drops to cleansed skin on face and neck, after Lotion Yon-Ka PS or PNG. Oily skin needs only 4 drops. Massage in gently and let it absorb. Use the serum alone or under your usual cream. For an intensive ten-day cure, apply in the evening as well. Suitable for daily use.

Result

After just five days the complexion looks fresher and more luminous. With continued use skin appears more even, dark spots look visibly softened and fine lines seem less noticeable. Skin feels supple and firmer, with no greasy film. Results vary from one skin to another and depend on your routine.

Featured ingredients

Vitamin C – Stimulates collagen production, protects against free radicals, and brightens the complexion.

Ingredients

BRASSICA NAPUS EXTRACT, ASCORBYL TETRAISOPALMITATE, PRUNUS ARMENIACA (APRICOT) KERNEL OIL, LIMONENE, CITRUS AURANTIUM DULCIS (ORANGE) OIL, HELIANTHUS ANNUUS (SUNFLOWER) SEED OIL, CURCUMA LONGA (TURMERIC) CALLUS EXTRACT, PUNICA GRANATUM LEAF CELL EXTRACT, LAVANDULA ANGUSTIFOLIA (LAVENDER) OIL, PELARGONIUM GRAVEOLENS LEAF OIL, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF OIL, CUPRESSUS SEMPERVIRENS OIL, THYMUS VULGARIS (THYME) FLOWER/LEAF OIL, PARFUM/FRAGRANCE, TOCOPHERYL ACETATE, CITRAL, LINALOOL, GERANIOL, CITRONELLOL

The manufacturer is responsible for the composition of the product. As the composition may change, we recommend always checking the ingredients on the packaging.

Frequently asked questions

What is Yon-Ka Serum C20 and who is it for?: Yon-Ka Serum C20 is an intensive vitamin C serum formulated with 20% stable vitamin C and 99.9% natural ingredients. It suits all skin types, including sensitive skin, and is ideal for anyone looking to visibly reduce signs of aging, fade pigmentation spots, and achieve a more radiant, even complexion — all within a short treatment period.
How do I use Yon-Ka Serum C20 in my routine?: Apply 6-8 drops of Yon-Ka Serum C20 to clean face and neck every morning. For an intensive 10-day flash treatment, also use it in the evening. If you have oily skin, 4 drops are enough. You can use it alone or layer it under your regular moisturizer, and it's safe to use even on days with sun exposure.
What does Yon-Ka Serum C20 actually do for my skin?: Yon-Ka Serum C20 delivers visible results within just 5 days: a more luminous complexion, a more even skin tone, and a noticeable reduction of wrinkles and pigmentation spots. The 20% stable vitamin C stimulates collagen production, while turmeric and pomegranate cells provide antioxidant protection against free radicals and support firmer-looking skin.
Which key ingredients make Yon-Ka Serum C20 effective?: Yon-Ka Serum C20 combines 20% stable vitamin C with antioxidant turmeric cells, radiant pomegranate cells, and organic apricot oil rich in vitamin A. Vitamin A promotes cell renewal to improve skin structure, while sweet orange oil adds an invigorating boost. The Yon-Ka Quintessence enhances the effectiveness of all active ingredients for optimal anti-aging results.
Will Yon-Ka Serum C20 feel heavy or greasy on my skin?: Not at all — Yon-Ka Serum C20 has a lightweight texture that absorbs quickly without leaving any greasy residue. This makes it comfortable for daily morning and evening use across all skin types. Because it layers easily under your usual cream, it fits seamlessly into any existing skincare routine without adding heaviness.
Why choose Yon-Ka Serum C20 over other vitamin C serums?: Yon-Ka Serum C20 stands out with its high 20% concentration of stable vitamin C combined with 99.9% natural ingredients — a rare combination in the market. The formula is designed for visible results within 5 days and is gentle enough for sensitive skin. The added Yon-Ka Quintessence boosts ingredient efficacy, making this serum a powerful yet skin-friendly anti-aging choice.