Why Kefir

A fermented probiotic ingredient your skin will thank you for.

Kefir ferment supports the skin microbiome, comforts skin, and delivers post-biotic hydration. Exclusive to Nihon Kefia in Japan.

The ingredient

Fermented in Japan. Rare in skincare.

Kefir is a probiotic ferment traditionally consumed as a drink. Nihon Kefia has spent 30+ years perfecting a Japanese kefir strain — first for wellness, now for the skin. Our kefir ferment supports the skin microbiome, helps skin feel comforted, and delivers post-biotic hydration.

The Kefir Mask is the first product of its kind to combine kefir ferment with a bio-cellulose sheet delivery system.

What you feel
  • Deeper, longer-lasting hydration
  • Calmer, more comforted skin
  • Softer, smoother texture
  • A dewy, well-rested glow
Since 1993

A quiet lab in Japan. Three decades of ferment science.

Nihon Kefia has been the go-to name for kefir in Japan for over 30 years. The Kefir Mask brings that expertise to skincare for the first time.

Ready to try it?

30-day guarantee · Free CA/US shipping over $60.

Shop The Kefir Mask — $38
FAQ

Everything you might ask.

Is kefir safe for sensitive skin?

Yes — our formula is designed to be gentle. If you have known sensitivities, always patch-test first.

Is this the same kefir I drink?

It's derived from the same family of ferments, but the strain and processing are formulated specifically for topical skincare.