Most of us think of circadian rhythm as something that controls sleep. But in beauty, the body’s internal 24-hour clock plays a much bigger role. Your skin follows a predictable cycle every day: Defence mode by day, when it protects itself from UV, pollution, and dehydration; and repair mode by night, when cell renewal, barrier recovery and moisturisation peak.
Naturally, the scalp follows this very same rhythm. As an extension of facial skin, its barrier weakens at night—making it more receptive to hydration and repair—and strengthens during the day to defend against heat, UV, humidity and styling stress. That means your hair health is influenced not just by the products you use, but when your scalp is naturally primed to receive them.
Related article: Noble Panacea's Céline Talabaza On Why Skincare Should Sync With Your Circadian Rhythm
Unsurprisingly, more beauty brands are beginning to build haircare around this rhythm. The latest to join this movement is Shiseido Professional’s new Sublimic Timetic line, a luxury three-step salon-grade range—shampoo, mask, serum—inspired by the science of circadian rhythm, and created specifically for Asian scalps and hair.
Instead of splitting products into “AM” and “PM,” Timetic takes a different approach: It supports the scalp’s natural rhythm all-round the clock. “As a shampoo and treatment, Timetic is formulated to be comfortable to use at any time of the day, with effects that last 24 hours,” says an R&D representative. “This series guides your scalp and hair to their optimal condition, aligning with your circadian rhythm—providing protection during the day and repair at night, no matter when you use it.”
Related article: Losing Hair In Your 20's & 30's? Here's What You Need To Know
At the centre of the formula is Chrono Chardy, an ingredient derived from a variety of Chardonnay grape (grown in Japan) tested to accelerate barrier recovery, boost moisturisation, reduce redness and smooth texture over time. In lab studies on the skin, it can accelerate barrier recovery in just two days, reduce redness in seven days, and restore skin texture in two weeks, and improve hydration and keratin condition in four weeks. We can only imagine what it can do for the hair.
The Timetic Complex also includes PhytoCuticle for cuticle repair and shine, and hydrating agents like pomegranate seed oil and hydrolysed rice protein. Together, they create a 24-hour support system to reinforce the scalp barrier when it’s vulnerable, and protect hair from environmental stress when it’s exposed. “This series' approach focuses on balancing moisturising, repairing, and conditioning ingredients to build beauty through daily care.”
Related article: Spa Awards 2025: Best Hair & Scalp Treatments
And because Shiseido always prioritises sensoriality, the line also features the brand’s MoodScentz + Relax & Unwind fragrance technology—blending jasmine, lily of the valley and soft amber to encourage a sense of calm and confidence as part of your routine.
The result is a luxury system that feels modern, sensorial and biologically aligned—a way to treat haircare not as a one-off cleanse, but as part of the body’s daily cycle of protection and renewal. Underneath the science, the takeaway is refreshingly uncomplicated: Timetic is a feel-good line of products designed to give your hair a new lease of life. That means more bounce, more shine, and that light, silky movement that only comes from hair that’s properly cared for at the scalp level.