The ULULIS Premium Water Conc. Black Serum Hair Oil is a next-generation leave-in treatment for hair suffering from dryness, breakage, colour damage, and the structural changes that come with age.
Launched in Japan in February 2026, this is the most advanced formula in the ululis lineup. Over 95% is moisture and repair actives — not fillers. If your hair has become duller, frizzier, and harder to manage, this addresses exactly that.
Perfect for: Chemically treated, bleached, or permed hair. Fine to medium hair that can't tolerate heavy silicone. Anyone who's tried standard moisturising oils and still wakes up with dry ends.
What makes it different:
Most drugstore oils use silicone to create the illusion of smoothness without repairing inside the strand. This one penetrates. PDRN and Tosurea work at a cellular level to rebuild from within. Collagen water and hydrolysed keratin are concentrated 10× higher than standard ululis. Black Serum Water — fermented black rice, black soy peptide, black pearl protein — builds structural resilience. The texture is viscous but weightless: absorbs without residue, even on fine hair.
What you'll notice:
First use: Hair feels significantly softer post-blowdry; ends stop looking ragged. After a few days: Frizz stays controlled even in humidity; finger-combing becomes effortless. With longer use: Hair holds moisture between washes; texture feels rebuilt rather than just coated.
Core actives: Tosurea, PDRN, Hydrolysed Keratin, Soluble Collagen Water (10× concentrated), Black Diamond Truffle Extract, Exosome, Black Serum Water Complex, Niacinamide, Glutathione
Free from: Sulfates, parabens, mineral oil, animal testing
100% Authentic — Japan Domestic Version. Sourced fresh from Tokyo. Same formula sold in Japanese beauty stores today.