The Ordinary Multi-Peptide Hair Serum – Does it really work?

The Ordinary Multi-Peptide Hair Serum Reviews

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A quick look at The Ordinary Multi-Peptide Hair Serum

  • 53% love it
  • 43% say they have seen an improvement
  • 38% will repurchase it
  • This currently scores 4.4/5 on the Deciem website.
  • Makes hair look thicker, denser, fuller & healthier
  • This product is 60ml
  • PAO (period after opening) is 12 months
  • Price: 17.90€, 17.90$, 15.80GBP, 30$AUD

The Ordinary Multi-Peptide Hair Serum – Everything you need to know

The Ordinary Hair Serum

With The Ordinary Multi-Peptide Hair Serum, there’s really only one question everyone wants to be answered. Does it really work?

The truth is that some people absolutely love it and say it works, whilst others will say it did absolutely nothing. For those who say it did nothing for – were they consistent? Did they really use it as instructed and persevere with it? I could easily say it didn´t work, but the truth is I wasn´t consistent.

What is The Ordinary Multi-Peptide Hair Serum and what does it do?

The Multi-Peptide Serum for Hair Density – Deciem says this is a concentrated serum for hair that looks thicker, denser, fuller and healthier.

When and how do I use The Ordinary hair serum?

  • Apply a few drops (2/3) once a day and ideally at bedtime
  • It should be applied to a clean, dry scalp.
  • Massage the serum into the scalp thoroughly.
  • Do not rinse out.
  • Patch testing is always recommended.

The Ordinary Multi-Peptide Hair Serum Reviews

What is the PAO of the hair serum?

The period after opening is 12 months

What is the texture, smell and colour of The Ordinary Multi Peptide Hair Serum?

The colour is clear and the product is a lot thinner than I expected.

Reviews of The Ordinary Multi-Peptide Hair Serum

Here’s a video of The Multi-Peptide Serum purchased directly from Deciem. You can read more reviews below and chat directly with people on Instagram or in the Facebook Group.

I cannot provide you with a review because I wasn’t consistent, but I will give it another go. When I did use it, I felt my hair look unwashed and greasy the next day, meaning I had to keep washing it. My hair is really fine.

Unboxing The Ordinary Hair Serum

See the unboxing of the hair serum purchased directly from Deciem. You can see the colour and viscosity of this product.

The Ordinary Multi-Peptide Hair Serum Reviews

The Ordinary Hair Serum currently scores a 4.4/5 on the official Deciem website. Below are just some of the reviews from the Deciem Chat Room Instagram post. You can read more here and talk directly with the people leaving the reviews.

I don’t have hair loss, but my hair is very fine, and I find that the multi-peptide serum does give volume and makes hair look healthy.

The Multi-Peptide Hair Serum – I started using on my brows, and bald patches to show some new hair growth. My brows are looking so much fuller!

I liked this serum! It works amazing if you have an itchy or irritated scalp. It balanced it out and gave me a few new baby hairs as well.

I wasn’t consistent, and it worked for me. Had I not taken before and after photos, or I wouldn’t have believed myself.

The Ordinary Multi-Peptide Hair Serum has totally worked for me. I run the tip down each side of my head and some at the crown and then brush with a massaging brush. I have noticeable hair growth.

The Ordinary Multi-Peptide Hair Serum FAQS

These questions have been answered by Deciem on social media

Is The Ordinary Hair Serum suitable for pregnancy/breastfeeding? We do not test our products on pregnant/nursing women. Hence, we cannot provide any confirmation on that aspect. It is best to consult your physician in advance before use just to be on the safe side.

Does the Multi-Peptide Hair Serum work on afro hair? Yes, it great for all hair types.

What is the pH level of this product? The Ordinary Multi-Peptide Serum for Hair Density has a pH of 4.75-5.75.

Will The Ordinary Hair Serum prevent hair fallout? Any hair condition would benefit from visible density improvements this product would offer. There are a number of studies discussing caffeine with respect to hair loss. While we don’t position this product as a hair loss treatment, we encourage you to research the studies of the technologies used in this formula in this regard.

Would The Ordinary Multi-Peptide Hair Serum help with scalp psoriasis? None of our products can be considered medical treatments for psoriasis. You may wish to discuss suitable treatments for persistent signs of psoriasis with your physician or dermatologist. 

More FAQS about The Hair Serum

Is The Ordinary hair serum ok to use on bleached hair? Yes, this product improves the tensile strength of hair strands.


How many drops do you use of the hair serum?
We generally recommend 2-3 drops

Does The Ordinary hair serum stimulate growth? The peptides in Multi-peptide Hair serum have been shown to visibly stimulate new hair growth and also visibly strengthen the existing hair.

How long does a bottle last? Depending on the frequency of use, a bottle may last 4-6 months or more. 

Does it have any side effects? All DECIEM products undergo a thorough safety assessment before hitting the market. Each ingredient is reviewed against current scientific literature and strict global regulations to ensure they are safe and compliant for topical application

How many times in a week should I use the hair serum?  It may be used nightly!

Can The Ordinary Multi-Peptide Hair Serum be used alongside minoxidil? We have not tested The Ordinary Multi-Peptide Serum for Hair Density with other non-DECIEM hair growth products, we cannot provide any information with certainty in that regard.

Is this serum suitable for an oily scalp? Absolutely!

Is it safe for colour treated hair? Yes

Final Thoughts on The Ordinary Multi-Peptide Hair Serum

The Ordinary Multi-Peptide Hair Serum Reviews
  • 53% of the Deciem Addicts love it
  • 43% have seen an improvement
  • 38% will repurchase it
  • Scores 4.4/5 on the Deciem website currently

Some of the reviews on this product are amazing, so I am a little surprised with these result, but it´s what the Deciem Addicts voted.

The Ordinary Multi-Peptide Hair Serum Box, Bottle & Serum

For anyone worried if they have bought a counterfeit product, here are photos of The Ordinary Multi-Peptide box, bottle and serum purchased from Deciem. The serum is quite watery. It rubs into the skin on the back of my hand quite nicely. It absorbs very well and leaves it feeling smooth, not oily.

The Ordinary Multi-Peptide Hair Serum Box
The Ordinary Multi-Peptide Hair Serum Bottle

Where to buy The Ordinary Multi-Peptide Hair Serum

Buy from Deciem or one of the many authorised stockists online.

Other Deciem hair products

Deciem has HIF for hair, and many The Ordinary Oils can be used in the hair. Find reviews in the Facebook Group and on Instagram.

Olaplex – My negative story with Olaplex

Previously, I had mentioned Olapex on this page, as this was why I was not consistently using this hair serum. It was amazing to start with, and I had the best hair of my life. But it changed, and it became really dry, frizzy, with lots of broken bits, and I felt more hair was falling out in the shower. Maybe it was time for a good trim, but even after that, it looked bad. I ended up cutting my long hair into a bob 🙁 because it just looked so bad.

Olaplex removes anything negative. That’s why the reviews are so good.

I posted a question on the Olaplex Facebook Group, asking if anyone had a similar experience. My question was not approved. So, I asked on Instagram and my question was deleted. I then posted again, asking why they deleted my post and screenshotted it this time. They restricted me. I wasn’t rude or insulting about their products, I just wanted some help and to see if anyone else had experienced the same thing. Maybe my hair wasn´t damaged enough, maybe Olaplex isn´t good for fine hair, or maybe I was doing something wrong. But unfortunately, Olaplex was not open to helping.

It seems Olaplex remove anything less than a glowing review, and they certainly do not want people discussing any possible negative effects of their products.

If reviews seem too good to be true, they generally are. Never trust 100% positive reviews on the brand´s own social media account where they have control. Always check other stockists and Reddit. I feel terrible because I recommended this to so many friends. I will never touch this brand again.

Hair Loss

When it comes to hair loss, there could be many reasons. It’s best to check with a professional and maybe get your blood checked. I lost a lot of hair after surgery and when I had anaemia. It slowly grew back once my body recovered. I picked up some great tips from the Curly Girl Method (Facebook Groups), using some of the recommended shampoos, plopping (wrapping hair up in a microfibre towel), using less heat and no heat at all through the summer months. The more I worried, the worse it became.

More details about the Multi-Peptide Hair Serum

This concentrated formula is designed to support hair health so that it looks thicker, denser, fuller and healthier. The technologies present in this formula include REDENSYL™ complex (with Larix Europaea Wood Extract and Camellia Sinensis Leaf Extract), Procapil™ peptide complex (with Biotinoyl Tripeptide-1), CAPIXYL™ peptide complex (with Acetyl Tetrapeptide-3 and Trifolium Pratense Flower Extract), BAICAPIL™ complex (with Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract and Glycine Soja Germ Extract), AnaGain™ (Pisum Sativum Extract) and High-Solubility Caffeine (1% net Caffeine by weight), in an ultra-lightweight, emollient base for efficient penetration. The total concentration of these technologies in the formula by weight is 21.15%.

(References are made to third-party trademarks in this description. REDENSYL™ is a trademark of Givaudan, Procapil™ is a trademark of Sederma Inc., CAPIXYL™ is a trademark of Lucas Meyer Cosmetics Canada Inc., BAICAPIL™ is a trademark of Provital, S.A., and AnaGain™ is a trademark of Mibelle Biochemistry. Neither DECIEM nor The Ordinary is affiliated with the trademark owners.)