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Kerastase Chronologiste Longevity Potion Rejuvenating Scalp Concentrate
Returns & Exchanges
RETURN & EXCHANGE POLICY
You have 10 calendar days to return an item for EXCHANGE ONLY from the date you received it. As the purchaser you would be responsible for return shipping charges.
Final sale items are not eligible for exchange or store credit. Final Sale items include Litres, Litre Duos, Clearance, Last Chance, Hot Tools, Hair Accessories, Brushes, Combs, Nail Polishes, Nail Accessories, Hair Extensions, and Appliances.
To be eligible for a exchange:
- your item(s) must be either be unused or no more than a quarter of the volume missing.
- your item(s) must be in the original packaging.
- your item(s) need to have the receipt or proof of purchase.
STEP 1 - Complete the online return form in full. Incomplete forms will not be accepted: Click here to download a return form
STEP 2 - Ship your item(s) back to us. You are responsible for return shipping charges. Shipping costs are non-refundable.
STEP 3 - We will immediately notify you on the status of your exchange after inspecting your returned item(s)
STEP 4 - You can exchange your item(s) or receive an online shop credit in the form of an e-gift card
In the event that you cannot find a suitable exchange a merchandise credit for the same value of the product purchased will be issued to you in the form of a store credit. Store credits cannot be redeemed for cash or refunded. You will receive your e-gift card within 5 business days after the exchange is confirmed
RETURNING TO A ZENNKAI SALON LOCATION
Should you prefer to return your online purchases to a location near you, come visit us! Simply bring your items and proof of purchase to our salons, following our set out Exchange Policy.
Final sale items are not eligible for exchange or store credit. Final Sale items include Litres, Litre Duos, Clearance, Last Chance, Hot Tools, Hair Accessories, Brushes, Combs, Nail Polishes, Nail Accessories, Hair Extensions, and Appliances.
If you are not fully satisfied with your purchase we will EXCHANGE it within 10 days with proof of purchase. EXCHANGE OR STORE CREDIT ONLY, NO CASH REFUNDS.
Hair Tools & Appliances
Zennkai provides a 1 year warranty on electrical tools with a manufacturer defect. They can be exchanged within one year of original purchase date, with proof of purchase and in its original packaging/box.
All electrical tools may be returned for exchange only due to manufacturer defect, with proof of purchase and all original components. No exchanges will be given without proof of purchase. Items must be in the original box/packaging. In the event that you cannot find a suitable exchange a merchandise credit for the same value of the product purchased will be issued to you in the form of a store credit.
Hot Tools & Appliances are a FINAL SALE unless manufacturer defect and are not eligible for exchange or store credit.
Shipping
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are nonrefundable.
Contact Us
If you have any questions on how to return your item to us, contact us via email at zennkai@megahairfamily.com.
Corporate Office
310-5491 REGENT ST
BURNABY BC V5C 4H4
Email: zennkai@megahairfamily.com
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Hair aging happens at the scalp — not at the ends. The visible signs (loss of density, lack of vitality, thinning, dullness, frizz) originate at the follicle level, where the scalp's cellular environment progressively loses its capacity to support healthy hair growth. Kérastase Chronologiste Longevity Potion is a leave-in scalp concentrate built specifically around that science: a lightweight, fast-absorbing serum that acts 10 layers deep into the scalp to reboost cellular activity and optimize the environment for the 3 billion scalp cells responsible for hair regeneration. The formula centres on 3% Pro-Xylane™ — Kérastase's proprietary green chemistry molecule derived from beech wood xylose — which densifies the scalp matrix by stimulating the extracellular matrix proteins that support follicle anchoring and hair thickness. Ochrophyta Algae (bio-sourced deep-sea kelp extract, Macrocystis Pyrifera) delivers a concentrated profile of marine minerals that protect the scalp against daily environmental aggressors and provide deep cellular revitalization. Used every 3 days for one month, the treatment works progressively to make hair appear thicker, denser, and healthier for longer.
What It Is
An age-defying leave-in scalp concentrate that acts 10 layers deep to reboost cellular activity and extend hair's youth capital. 3% Pro-Xylane™ densifies the scalp matrix; Ochrophyta Algae (Macrocystis Pyrifera) delivers marine revitalization. Apply every 3 days on towel-dried scalp for 1 month. Leave-in. Paraben-free. Biodegradable formula. Authorized Kérastase retailer.
Hair Concerns
- Hair Loss & Thinning
- Scalp Health
- Dryness
Key Benefits
- Pro-Xylane™ (Hydroxypropyl Tetrahydropyrantriol) at 3% concentration densifies the scalp matrix by stimulating the synthesis of extracellular matrix proteins (glycosaminoglycans and fibronectin) that anchor follicles and support hair thickness.
- Ochrophyta Algae (Macrocystis Pyrifera / Kelp Extract) delivers a concentrated marine mineral profile that protects the scalp's cellular environment against UV, pollution, and mechanical aggressors — the daily accumulation of which accelerates biological scalp aging, reduces follicle activity.
- Leave-in formula applied every 3 days for a 1-month protocol penetrates 10 layers deep into the scalp to optimize the cellular environment for the estimated 3 billion scalp cells responsible for hair regeneration — combating all 5 identified signs of hair aging (frizz, dullness, lack of thickness).
Highlighted Ingredients
What Else You Need to Know
Longevity Potion is a treatment protocol, not a daily serum — apply 5 doses (each pipette filled to the marked line = 1 dose) directly to towel-dried scalp section by section every 3 days for one month. Shake well before each use. Leave in — do not rinse. For the complete Chronologiste nighttime ritual, apply Longevity Potion to the scalp first, then follow with Chronologiste Overnight Youth Serum on lengths and ends.
Fragrance
Paris Couture — revitalizing and sensual. Top: Freesia, Rose, Marine Notes. Heart: Bergamot, Orris, Green Notes. Base: Musk Accord, White Flowers, Patchouli.
How to Use
Shake well. Apply on towel-dried scalp every 3 days for 1 month. Distribute 5 doses section by section (1 dose = 1 pipette filled to the mark). Leave in — do not rinse. In case of eye contact, rinse immediately and thoroughly. Pair with Chronologiste Overnight Youth Serum on lengths and ends as the second step of the nighttime ritual.
FAQ
How often do I use the Longevity Potion?
Every 3 days for one month. Apply 5 doses on towel-dried scalp section by section — 1 dose equals one pipette filled to the marked line. Leave in and do not rinse. The 30ml bottle contains one full month of the treatment protocol at this frequency.
Can I use this alongside other Kérastase scalp serums?
Yes — Kérastase recommends using Longevity Potion as the first step of the Chronologiste nighttime ritual, applied to the scalp, followed by the Overnight Youth Serum applied to lengths and ends. The two are designed to work in sequence, not competition.
Is this suitable for a sensitive scalp?
Kérastase confirms the formula is gentle and suitable for mature and sensitive scalps. However, Alcohol Denat. is the primary base and the formula contains Menthol — those with severely reactive or damaged scalp barriers may want to patch test first or consult a professional before beginning the monthly protocol.
Authorized Kerastase retailer · Zennkai Canada since 1984 · Authorized Kérastase retailer · Zennkai Canada since 1984 · L'Oréal Professionnel group · Pioneering luxury haircare since 1964