IN/OUT Serum and fermented rice extract —

and fermented rice extract — ingredients long celebrated in Japanese beauty rituals for their ability to promote clarity

To enhance their effectiveness

Traditionally served after meals or before rest

the formula is enriched with niacinamide

sodium hyaluronate

IN/OUT Serum and fermented rice extract —La 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.