HYDRA N°1 Serum

  • Yon-Ka Hydra N°1 Serum
    Long-lasting hydration booster
    All skin types deep dehydration
    Day & Night
    • 95% of natural ingredients
    • Paraben free
    Reference :


The perfect emergency remedy for very dehydrated skin.

With its true long-lasting, intense hydration activating complex, this creamy and refreshing gel is the perfect emergency remedy for very dehydrated skin: quickly absorbed, it replenishes the skin's hydration levels.

The anti-aging and hydrating* effects are enhanced when used in association with the CREME or the FLUIDE. 

The skin is softer and suppler; its glow restored, it appears smoother and re-plumped.


In the morning and/or evening, after cleansing and spraying on LOTION YON-KA, apply the serum (pump 2 or 3 times) to the face and neck, then:

HYDRA No. 1 CREME (Hydrating, repairing) for dry or sensitive skin 

HYDRA No. 1 FLUIDE (Hydrating, mattifying) for normal to oily skin 


Essential Ingredients

• Imperata cylindrica, polysaccharides rich in fructose, aloe vera, serine, sodium PCA, vegetable glycerin: instant & long-lasting hydration 

• Olive phytosqualane: anti-dehydration

• Yeast extract, hyaluronic acid, silicon: restructuring - redensifying action

• Vitamins E, C, A: anti-oxidant - regenerating

• Essential oils of rose, chamomile and jasmine:  balancing and relaxing phyto-aromatic effects.

fl 30ml
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Hydralessence Face

Hydralessence Face

Intense hydration treatment

Time Length: 60 min

Choose Hydralessence year-round, as soon as your skin starts showing symptoms of dehydration.

your skin is renewed, soothed, and rebalanced; softness and beauty are restored.

Find Yon-Ka beauty salon or spa near you Find an authorized Yon-Ka centre

In addition, use MASQUE N° 1 once or twice a week.



*Tests: corneometric testing over an 8 hour period. 

SERUM + CREME:instant and significant hydrating effect: +144% over 8 hours. 

SERUM + FLUIDE:instant and significant hydrating effect: +122% over 8 hours.