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Professional use

Amino-15: Hair Straightening System

A professional salon straightening treatment for clients who want smoother, stronger-looking hair with lasting shine, lower frizz and easier day-to-day styling.

(5.0) 17 reviews
Professional only
  • 6+ month result window
  • Training required
  • Vegan formula
  • Amino-acid support

Professional account required

A verified professional account is required to order this product. Register as a professional or sign in with an approved account to continue.

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Better value in a kit

You may save by buying this in a kit.

This product is included in selected kits, so you can order the routine together and often get better value than buying each item separately.

Starter Kit

Entry kit

Starter Kit

A compact professional starter order with the 200ml Hair Straightening System plus 300ml shampoo and conditioner.

Professional only View kit
Medium Kit

Most popular

Medium Kit

A professional salon stock kit with 500ml Hair Straightening System, retail aftercare and Molecular Repair Treatment.

Professional only View kit
Master Kit

Salon stock

Master Kit

The largest professional kit with backbar sizes, 300ml aftercare stock and extra Molecular Repair Treatment.

Professional only View kit

Product questions

Before you order the system.

Who can buy Amino-15?

Amino-15 is a professional salon system. Trade options require a verified professional account because the product must be used with the correct consultation and application protocol.

How long can results last?

Results are designed to last up to 6+ months when the service is performed correctly and maintained with suitable aftercare.

Is this the same as a keratin or relaxer?

No. Amino-15 is positioned as an amino-acid straightening system. It is made to improve smoothness, shine and manageability without the heavy coated feel associated with some traditional services.

Do I need to complete training?

Yes. The free 32 minute training explains the consultation, application, heat work and aftercare guidance needed before offering the service.

Can the treatment be done on grey or bleached hair?

Take extra care with blonde, grey, and lightened hair. In general we do not recommend treating naturally grey or white hair due to the risk of yellowing. If a stylist decides to proceed, a preliminary strand test is essential to assess any potential colour change. Use lower temperatures and fewer passes, watch for yellowing or warming, and stop adding passes once you see a colour shift. Toner can usually be applied after five days or after the third wash.

Full ingredients (INCI)

Aqua, Glyoxylic Acid, Glycolic Acid, Cetearyl Alcohol, Coco-Caprylate, Parfum, Ceteareth-20, Glycine, Serine, Aspartic Acid, Alanine, Valine, Isoleucine, Proline, Threonine, Sodium PCA, Sodium Lactate, Arginine, PCA, Histidine, Phenylalanine, Lysine, Methionine, Glutamic Acid, Tyrosine, Tocopheryl Acetate, Cetrimonium Chloride, Prunus Amygdalus Dulcis Oil, Glycerin, Hippophae Rhamnoides Fruit Extract, Rosmarinus Officinalis Leaf Extract, Helianthus Annuus Seed Oil, Tocopherol, Glycol Distearate, Hydrolyzed Ceratonia Siliqua Seed Extract, Zea Mays Starch, Polyquaternium-7, Guar Hydroxypropyltrimonium Chloride, Tetrasodium Glutamate Diacetate, Potassium Sorbate, Sodium Benzoate, PEG-8, PEG-8/SMDI Copolymer, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Phenoxyethanol, Biotin, Tetramethyl Acetyloctahydronaphthalenes, Linalyl Acetate, Vanillin

Why it works

Why salons choose Amino-15.

For salons that want a high-value straightening service with clear training, visible proof and a result clients can maintain at home.

Long-lasting smoothness

Helps reduce frizz and daily styling friction for up to 6+ months when applied using the Rejuvenum method.

Stronger-looking finish

Amino acids and conditioning agents leave hair feeling smoother, more flexible and healthier-looking.

Built for trained stylists

The result depends on consultation, sectioning, timing and heat technique, so every professional gets free training before offering the service.

Formula notes

The technology behind the smoothness.

15-amino-acid + NMF complex

15-amino-acid + NMF complex

Fifteen amino acids, sodium PCA and sodium lactate help leave treated hair feeling conditioned, flexible and smooth.
Cuticle-smoothing conditioning complex

Cuticle-smoothing conditioning complex

Cetrimonium chloride, Polyquaternium-7 and cationic guar support slip, manageability and a smoother-feeling finish.
Lightweight lipid conditioning

Lightweight lipid conditioning

Coco-caprylate and cetearyl alcohol help improve softness and slip without a heavy coated feel.
Sweet almond oil

Sweet almond oil

A familiar plant oil selected to support softness, shine and a polished salon finish.
Hydrolyzed carob seed extract

Hydrolyzed carob seed extract

A plant-derived support ingredient selected to complement the smoothing and conditioning system.
Sea buckthorn fruit extract + vitamin E

Sea buckthorn fruit extract + vitamin E

Botanical and antioxidant support selected for conditioned feel and a polished finish.

How to use

The professional service flow.

01

Consult

Assess colour history, hair condition, porosity and the client result goal before choosing the service strength.

02

Apply

Work Amino-15 through controlled sections using the professional method taught in training.

03

Seal

Use the correct drying and heat technique to create the smoother, polished finish.

04

Maintain

Recommend Amino-15 Shampoo and Conditioner so the client can protect the result at home.

Professional certification

Learn the Amino-15 method before offering the service.

The free online training is 32 minutes and walks stylists through the consultation, application and finishing protocol.

Start free training
Rejuvenum training video preview

Details

What clients and stylists need to know.

Best for

Clients who want straighter, shinier, easier-to-style hair with reduced frizz and a polished salon finish.

Professional-only

The system is reserved for trained professionals because timing, sectioning, suitability checks and finishing technique affect the result.

Aftercare

Use Amino-15 Shampoo and Conditioner to help maintain softness, shine and manageability after the salon appointment.

Client expectation

Healthy hair can achieve a long-lasting straight result, including curly, textured and Afro hair. Results may be reduced on weaker or compromised hair, so condition and suitability must be assessed before treatment.

Independent testing

Results designed to last beyond wash day.

Amino-15 is built as a professional straightening service, with measurable improvements in breakage resistance, split-end count, shine, smoothness and overall hair condition.

42% Improved resistance to breakage
58% Reduction in split end count
80% Improved overall hair condition
93% Improved shine and smoothness

Relaxers

Permanent chemical reshaping with a harsher service profile.

Keratin

Smooths and coats, but can feel heavy and may have stronger fumes.

Amino-15

A trained salon method that straightens the hair without excessive coating and without damaging the hair bonds.

Customer reviews

What people notice.

17 reviews for Amino-15: Hair Straightening System

    Nicola c
    August 27, 2026
    I’ve had my third Rejuvenum straightening treatment with Stewart at Platform 1 in Oldmeldrum, and the results are amazing! The treatment lasts around six months and has completely transformed my super-curly, unmanageable hair. I can now dry and style it in just 10 minutes! Stewart is always so friendly and makes the whole experience enjoyable. The cups of tea and Daim bars are a lovely bonus too! I wouldn’t go to anyone else and couldn’t recommend him highly enough!
    Sile Casserly
    January 23, 2026
    As someone with very thick wavy hair prone to frizz- especially in humid or damp conditions- I have been seeking effective straightening treatments over the years. When I scheduled my appointment with Rejuvenum , I was sceptical. I found it hard to believe that any treatment could possibly allow me to simply blast dry my hair in ten minutes and walk out the door- without the need for further styling. Five months post treatment, I am genuinely amazed by the results. Not only have I not needed to use my hair straightener once in this time, but my hair remains significantly more manageable, smooth and frizz free - even in challenging Irish weather conditions. I highly recommend the Rejuvenum Amino-15 treatment to anyone struggling with unruly or frizzy hair.
    Amino-15: Hair Straightening System photo review
    Amino-15: Hair Straightening System photo review
    Amino-15: Hair Straightening System photo review
    +1
    Kim Gardiner
    August 26, 2025
    I’ve used the new version & very happy with the results, client is over the moon with her hair
    Amino-15: Hair Straightening System photo review
    Sarah Oliver
    May 4, 2025
    Done my first treatment on my lovely client and was amazed by the results hair felt amazing and was so straight she was over the moon with her results
    Amino-15: Hair Straightening System photo review
    Amino-15: Hair Straightening System photo review
    Amino-15: Hair Straightening System photo review
    +1
    Edel Cashman
    April 1, 2025
    I've been using REJUVENUM for a few months now and absolutely love the results, as do my clients, This is the game changer of hair straightening and strengthening treatments. Add this exceptional service to your salon and see some amazing results ✨️
    Amino-15: Hair Straightening System photo review
    Sophie South Hair
    March 20, 2025
    I’ve had amazing results from this product and I cannot recommend it enough! I’ve got more bookings coming up and clients are wanting to step away from their keratin treatments. My clients are recommending to their friends and family, I’m so glad I decided to do the training on this product, best decision of 2025!
    Megan
    February 20, 2025
    We couldn’t be more impressed with the Amino-15 Hair Straightening System in our salon. From the very first use, we saw remarkable results. The treatment gives our clients smooth, frizz-free hair with a natural shine that lasts. Not only is the process quick and easy for our stylists to apply, but it’s also gentle on the hair, leaving it feeling soft and healthy. Our clients are thrilled with the transformation, and we’ve noticed increased satisfaction and repeat bookings. The Amino-15 system is definitely a standout in our services, and we’re proud to offer it in our salon!
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