Search  for anything...

The Ordinary Multi-Peptide Serum for Hair Density, Peptide-Powered Formula for Thicker, Fuller Looking Hair

  • Based on 1,262 reviews
Condition: New
Checking for the best price...

Buy Now, Pay Later


As low as $5 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund / replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Sep 11
Order within 21 hours and 24 minutes
Available payment plans shown during checkout

Size: 2 Fl Oz (Pack of 1)


Brand: The Ordinary


Scent: Fragrance Free


Item Weight: 2 Ounces


Item Form: Serum


Active Ingredients: lactic_acid, peptides


Product Dimensions ‏ : ‎ 1.53 x 1.53 x 5.14 inches; 2 ounces


Item model number ‏ : ‎ sb-2


UPC ‏ :


Manufacturer ‏ : ‎ DECIEM


Best Sellers Rank: #930 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #10 in Hair Regrowth Treatments


#10 in Hair Regrowth Treatments:


Customer Reviews: 4.3 4.3 out of 5 stars 1,262 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Sep 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • On my second bottle
Size: 2 Fl Oz (Pack of 1)
This has really worked with encouraging hair growth and reducing shedding. I use it with my rubber massager before bed... and when I wake up I'm always surprised my hair is not greasy... just soft. Lots of baby hairs popping up (also taking vitamins for hair) and my hair dresser even noticed all the new growth. ... show more
Reviewed in the United States on May 21, 2025 by FramFram Minnesotan

  • Noticeable Results with Consistent Use
Size: 2 Fl Oz (Pack of 1)
I’ve been using this serum for a little over two months now, and I’m starting to see a real difference. My hair feels thicker at the roots and looks a bit fuller overall. It’s very easy to use — just a few drops at night, and it doesn’t leave my hair greasy or heavy. There’s no strong smell, which I appreciate, and it absorbs quickly. You definitely have to be consistent and patient with it — it’s not an overnight miracle — but it’s affordable compared to a lot of other hair serums out there. Shipping was fast, and it arrived well packaged. I’ll definitely keep it in my routine for now! ... show more
Reviewed in the United States on April 29, 2025 by Sean Bozarth

  • Baby hair growing
Size: 2 Fl Oz (Pack of 1)
I have started using the hair serum for a few days and I started noticing baby hair growing. Am I just dreaming or is it really working? I'll leave a review again after I finish a bottle.
Reviewed in the United States on August 5, 2025 by Emeric

  • Pretty good
Size: 2 Fl Oz (Pack of 1)
A little annoyed as I thought this would be a lot more water based. It definitely has some oil to it and feel like I would need to wash my hair daily. Update: it’s not so much that it’s oily, but it does make your hair feels a little heavy after you put it on. I’ve been applying it at night, then in the morning I brush my hair. I don’t know that my hair is oily or greasy but it’s more of a heavy feeling as if you put too much product on your hair. But the instructions do say to use a few drops, but I don’t have that kind of patience so I use the dropper and just drag it along different parts of my scalp and inserting the product as it glides down. So I’m likely applying too much product. Overall, it’s not as bad as I thought, and I’ll take this over some of the more oily products out there. I’ll provide an update in a few months. ... show more
Reviewed in the United States on August 19, 2025 by Fabiola Mollica

  • Don’t know if this edit will show up but…
Size: 2 Fl Oz (Pack of 1)
I’m more pleased with the consistency of this product than others I’ve tried and given up on immediately. This is not oily like most and it hasn’t run down my face like the previous product. It is WAY too early to tell how effective this is, but I put it on as directed in the morning as soon as I get up and by the time I head out the door to walk my dog (about 30 min) it’s dry enough to comb my hair. At night I apply after my regular nightly routine and it’s dry before I go to bed. At first I was annoyed that you put it on clean hair that you’ve dried & styled and then had to put this wet stuff on, but as I said above I’ve worked it into a routine that works for me. Fingers crossed that it does what it claims. Update: I apologize - the review i gave was for a similar product that I do like from Cosmetic Skin Solutions!- this is the runny one and I believe I returned it. ... show more
Reviewed in the United States on June 27, 2025 by Cherie C.

  • short term results good
Size: 2 Fl Oz (Pack of 1)
I love this stuff. I drop it on various point of my scalp at night on dry hair... it tingles so I know it's doing something. Go to bed and in the morning it's not oily but has produced manageable hair full of body and healthy feeling! so short term it's already showing great results. I'll update in a couple months to comment on its long game results. ... show more
Reviewed in the United States on August 12, 2025 by EasyBreezySunflower

  • Excellent product!
Size: 2 Fl Oz (Pack of 1)
I seldom do reviews, but I got this 20 days ago and I see a real difference already in growth and hair coming in already. I know that sounds crazy but it is the truth. I think if it's important to you, you should give it a try. I use it in the evenings before I wash my hair because with morning hair products I use, it builds up ti be too thick, but I absolutely love this stuff! If you have very thin hair you may be able to use it when not washing next day and it may give more volume. Just see what works for you. I had dreads for three years and it was hard on my hair density when I combed them all out. Lost a lot of hair during that process. My hair has become thinner as I've gotten older anyway so between the two, thinning and taking out dreads, I want to get it thicker again and back to its length. I've tried many products over my many years so I'm no beginner at this stuff. (62) Now, in looking at reviews, maybe it's for some and not others but I seriously do see a difference in my hair already and it is not all in my head (it's on my head, though. lol.) I bought if for my daughter and will be recommending to my friends for sure. ... show more
Reviewed in the United States on April 25, 2025 by happygirl

  • Incredible
Size: 2 Fl Oz (Pack of 1)
Absolutely works. My temples were thinning and my eyebrows had developed bald spots. The top of my head is also a lot thinner and I decided to do something when I badly sunburned my head which had never happened before. I've been putting this on my brows,scalp, and temples for over a week and you can already see and feel a difference. My eyebrows are much fuller and I can feel and see new baby hairs on my temples and scalp. I'm so excited to keep using this! I've been dipping a new small makeup brush into the jar and applying it to my scalp that way since rubbing it in seemed to mostly get the product on my hair. ... show more
Reviewed in the United States on August 3, 2025 by MK

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...