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Nioxin System 4 Litre Duo
Returns & Exchanges
Thank you for shopping at Zennkai.com.
ONLINE 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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The Nioxin System 4 Litre Duo is the professional 1-litre cleanser and conditioner for colour-treated hair with noticeably progressed thinning — Nioxin's most intensive colour-safe density system, combining a concentrated BioAMP Technology formulation with colour-compatible chemistry to address more visible density reduction in colour-treated hair, at one of the highest savings percentages in the Zennkai litre range, at Canada's lowest price.
What's Included
• Nioxin System 4 Cleanser — 1 litre (1000ml)
• Nioxin System 4 Scalp Therapy Conditioner — 1 litre (1000ml)
Why Buy the Litre Size
• Save 48% vs buying two regular-size Nioxin bottles — exceptional value for colour-treated clients with more significant thinning
• Noticeably progressed thinning requires consistent intensive daily intervention — the litre provides that without gaps in routine
• Not available at Sephora in litre size — professional salon-channel exclusive at Zennkai
• 1000ml vs 900ml from three regular bottles — 100ml extra free every purchase
• Lasts approximately 3–4 months with daily use
About Nioxin System 4
Nioxin System 4 is the step up from System 3 for colour-treated clients experiencing more visible and progressed thinning — where standard density support is insufficient and a more intensive scalp intervention is needed while maintaining colour compatibility. The concentrated BioAMP Technology provides more significant density amplification, and the scalp access system provides deeper follicle clearing, all within a formula that protects existing colour chemistry.
Key Ingredient
Concentrated BioAMP Technology (colour-compatible) — a higher-potency version of Nioxin's density-amplifying blend for colour-treated hair with noticeably progressed thinning. Intensive colour-compatible scalp access cleanser — deeper-acting follicle clearing system maintaining colour vibrancy.
Best For
• Colour-treated hair with noticeably progressed thinning
• More visible scalp or significant ponytail reduction in colour-treated hair
• Colour clients who used System 3 and need to step up their density support
• Post-chemotherapy or post-medical-treatment thinning in colour-treated hair
• Any colour-treated client experiencing a significant, noticeable reduction in density
Available at Zennkai — Canada's lowest professional price on Nioxin. Authorized retailer. 100% authenticated professional stock. Free shipping on orders over $50. Ships anywhere in Canada. Beauty with Benefits members earn points on every purchase — join free at zennkai.com/pages/beauty-with-benefits. Shop the full Nioxin collection at zennkai.com/collections/nioxin.