Hair can start to feel different long before you decide to change its style. The ends may need more care, the surface may look less luminous, or a familiar blow-dry may have less fullness. A useful approach to anti-ageing haircare begins with those everyday observations: how your scalp feels, how your lengths behave, and the finish you enjoy wearing.
Two new additions to Reflexions bring that approach into the Kérastase Chronologiste routine: Longevity Potion for the scalp and roots, and Overnight Youth Serum for the lengths and ends.
What changes as hair ages?
Hair ageing varies from person to person. Research has found age-related changes in strand diameter and hair density, both of which contribute to the impression of fullness. There is no single birthday at which everyone needs to change their routine. Start with the changes you can actually see and feel.
For this routine, think of “anti-ageing” as care for the hair’s appearance and feel: softness, shine, manageability and a fuller-looking finish. Those cosmetic goals help you judge whether a product earns its place on your shelf.
Where Chronologiste fits
Kérastase positions Chronologiste around hair weakened by visible signs of ageing, including dryness, dullness, frizz and reduced-looking volume or thickness. These two serums add targeted leave-in steps to that range. Both feature Pro-Xylane™ and Ochrophyta Algae, with different formulas and application areas.
The simplest way to remember them is by placement: the dropper goes to the scalp; the pump goes through the lengths.
Longevity Potion: a dedicated scalp step
30 ml · ₹6,700, inclusive of taxes
Chronologiste Longevity Potion is a scalp concentrate containing 3% Pro-Xylane™ and Ochrophyta Algae. Kérastase describes it as care for scalp vitality and fuller-looking hair. Its place in the routine is at the roots after washing.
- Shake the bottle well.
- On towel-dried hair, work section by section across the scalp and roots.
- Apply five doses, with each dose measured as one pipette filled to its mark.
- Leave it in. Kérastase’s directions recommend use after washing over a one-month period.
Explore Longevity Potion 30 ml →
Overnight Youth Serum: evening care for the lengths
30 ml · ₹4,300, inclusive of taxes
Chronologiste Overnight Youth Serum brings Pro-Xylane™ and Ochrophyta Algae into a leave-in night treatment for dry, dull or frizz-prone lengths. Its focus is a softer, smoother, more luminous finish.
- Before bed, dispense one pump and spread it between your palms.
- Distribute evenly through the lengths and ends of dry or towel-dried hair.
- Leave it in overnight. There is no need to rinse it out in the morning.
Explore Overnight Youth Serum 30 ml →
Build the routine around your hair
If your main concern is how the ends feel and settle, the overnight step is a useful starting point. If you want a dedicated scalp-care step, ask your stylist about Longevity Potion. Both can fit into a routine, with each kept to its intended area.
Keep cleansing and conditioning familiar while introducing a new leave-in. Notice how easily your hair detangles, how the ends feel and how the surface catches the light. Your stylist can help you decide which step suits your texture, current products and styling habits. Follow the directions on your own pack.
Fuller-looking hair is a cosmetic result; sudden, patchy or persistent hair loss deserves an assessment by a dermatologist.
A little more care, where it counts
Your hair can keep its character while your routine evolves. Whether you wear it silver, coloured, straight or naturally textured, the aim is a finish that feels good to live with.
Message Reflexions to plan a haircare consultation, or read our companion guide to density, softness and shine as hair changes.
Sources and product guidance
Product information and application guidance: Kérastase Longevity Potion and Kérastase Overnight Youth Serum. Hair fullness research: Robbins and colleagues, 2012. Hair-loss guidance: American Academy of Dermatology. Prices checked at Reflexions on 15 September 2026.