Let’s face it—hair loss in women is real and can be due to a variety of issues, like hormonal changes that come from pregnancy and childbirth, general stress, and vitamin and mineral deficiencies. Combine that with heat styling with hair dryers, curling irons, and straighteners and you get a lot of damage that requires extra TLC.

So when you’re going through your day-to-day skincare routine, consider adding a hair serum to the mix. The Ordinary’s hair density serum is formulated with peptides (amino acids are all the rage) to help make hair fuller, encourage new growth, and strengthen the hair cuticle—and shoppers are attesting to its effectiveness.

　　 The Ordinary Multi-Peptide Hair Density Serum

$23 at Amazon The leave-in formula targets to support the scalp with the nutrients and ingredients like larch wood, Chinese skullcap, and wheat kernel extracts to help grow thicker hair and promote fullness. The active peptide ingredients are said to improve blood circulation to the scalp, too, to further strengthen hair follicles and promote the production of collagen.

Skeptical? Well, this clinical formula really works. In fact, one Amazon shopper called it a “miracle product,” claiming that their hair grew three inches and tripled in hair thickness. They explained that after years of heat and color damage, hair was falling out, shrinking in length, and breaking. “It’s been two months and the results are actually insane! It’s hard to believe it’s real!” They said her hair tripled in thickness and grew three inches.

The 14 Dry Shampoos We Love The Most Another five-star reviewer said they were “honestly shocked this worked so well!” They were diagnosed with a hair-loss condition but “after about two months of use, [they] have noticed a huge change in the density.”

This formula comes in a 2-ounce bottle and requires regular use of a few drops on the scalp once a day, preferably at night. It can be combined with The Ordinary Sulphate 4% Cleanser and The Ordinary Behentrimonium Chloride 2% Conditioner for a full hair-thickening regimen. 

If you’re struggling with hair loss, breakage, or an otherwise unhealthy scalp, this $23 “miracle” bottle might be a worthwhile investment to ensure you’re tending to your hair health. According to Amazon shoppers, you won’t be disappointed.

The hair care doesn’t stop there, though. We’ve listed a few other popular hair serums and oils that shoppers say have helped strengthen their locks and improve their scalps. 

　　 Minimalist Hair Density Serum 

$15 at Amazon

　　 SoulSpa Advanced Peptide Hair Growth Oil 

$18 at Amazon

　　 Vegamour Gro Hair Serum 

$64 at Amazon

　　 Spectral DNC-N Hair Thickening Serum 

$40 at Amazon

　　 Bare Anatomy Advanced Hair Growth Serum 

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