IN/OUT Serum tea pairing and welcomes you home

and welcomes you home

and the foundation of resilience

It leaves no residue

Formulated with mineral-rich deep sea water sourced from the Noto Peninsula in Japan

Known for its purity and stability

IN/OUT Serum tea pairing and welcomes you homeLa Sincia IN OUT Serum is the third step of the IN OUT ritual a targeted treatment phase that delivers intense hydration and visible renewal. Formulated with traditional Japanese fermented ingredients sourced from a historic Edo period sake brewery, this serum combines aged sake lees, fermented soy milk, and fermented rice extract ingredients long celebrated in Japanese beauty rituals for their ability to promote clarity, softness, and elasticity.