FREE SHIPPING ON ALL ORDERS OVER $50*
Redken Acidic Grow Full Bundle for Thinning or Flat Hair
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
Couldn't load pickup availability
Acidic Grow Full System Shampoo, Conditioner, Serum & Densifying Spray
The full system. The full result. When all four Acidic Grow Full products work together, they unlock the fullness of +5,000 hair fibers* — cleansing, conditioning, rebalancing, and densifying at every step of your routine. This bundle gives you everything you need to go from flat and thinning to visibly fuller, stronger, denser hair, and saves you $26.85 compared to buying each product individually.
Best For:
✔ Thin, flat, or fine hair
✔ Hair prone to fall and breakage from brushing
✔ Anyone starting or committing to a full density routine
✔ All hair types, including color-treated
What's Inside
① Acidic Grow Full Densifying Shampoo The system starts here. Gently cleanses and rebalances scalp pH while laying the foundation for visibly fuller hair with every wash.
② Acidic Grow Full Densifying Conditioner Lightweight hydration that builds body without weight. Conditions strands from mid-length to ends, leaving hair softer, stronger, and primed for density.
③ Acidic Grow Full Scalp & Hair Serum The targeted treatment step. Sprays directly onto the scalp to energize the root environment, reduce breakage, and build long-term density where it starts.
④ Acidic Grow Full Instant Densifying Spray The finishing touch. A no-rinse leave-in that delivers immediate visible fullness while protecting hair from heat styling up to 450°F.
KEY BENEFITS
- Visibly fuller, thicker-looking hair — powered by the +5,000 hair fiber Densifying Complex*
- 2X stronger strands — clinically tested across the full system
- 2X less breakage — from brushing and everyday styling
- Scalp pH rebalancing — Azelaic Acid targets the root cause of thinning at the source
- Clinically tested to hydrate the scalp — every step nourishes as it treats
- Save 15% — vs. buying each product separately
*91% of users in a consumer study agreed hair feels thicker.
HOW TO USE:
- Apply Acidic Grow Full Shampoo to wet hair. Lather and rinse.
2. After shampooing, apply Acidic Grow Full Conditioner from mid-length to ends. Rinse.
3. Spray Acidic Grow Full Scalp & Hair Serum half an inch away from the scalp on clean, damp hair. Massage into scalp.
4. Spray Acidic Grow Full Densifying Spray six inches away from hair, on clean, damp hair. Comb through from mid-sections to ends.
The Science Inside
| Ingredient | What It Does |
|---|---|
| Azelaic Acid | Rebalances the scalp's pH to support a healthier growth environment |
| Caffeine | Energizes and awakens the scalp |
| Prebiotics | Hydrate and protect the scalp's acid mantle |