The Ordinary Hair Serum Review

Woman holding hair serum in hand

Key Points

  • Your diet, hair care routine, hair products, genetics, and overall health affect the quality and growth of your hair.

  • Alopecia is a general term for hair thinning or hair loss, with a variety of causes and symptoms.

  • If you're suffering from hair loss or thinning, there are treatment options available to improve the health of your scalp and promote hair growth.

  • The Ordinary hair growth serums are industry-favorite products with proven results in stimulating hair growth and even improving symptoms of alopecia.

What you eat, the products you use in your hair, your hair care routine, and several other factors contribute to the health and density of your hair. A lack of sufficient nutrition leads to hair thinning or gradual hair loss and causes dry, brittle, or dull hair.

Thinning hair and noticeable hair loss are disheartening and often increase stress levels in men and women. Hair loss impacts self-esteem and mental anguish, especially when solutions aren’t promising or readily available. This is why dermatologists and hair care experts spend considerable time exploring different avenues of hair care — including the formulation of hair serums like The Ordinary.

A young woman parting her hair, showing scalp.

Alopecia Awareness

There are different kinds of hair loss resulting from aging, environment, genetics, lifestyle, health issues, or strict hair routines. Some people develop a type of alopecia, which is a general term to describe hair thinning or hair loss. Each type of alopecia has a different cause and range of symptoms.

Alopecia Areata

Alopecia areata is an autoimmune disorder in which the body’s immune system attacks healthy hair follicles. As injury to the hair follicles occurs, hair slowly starts to fall out. This type of alopecia causes hair to fall out in patches, typically directly from the scalp. Sometimes, hair also falls out from other areas of the body, such as the eyebrows or eyelashes.

Alopecia areata is genetic, which means if a parent or close blood relative experiences this type of hair loss, the likelihood of a child developing it is higher. Sometimes, this hair loss begins in childhood or during teen years. In many cases, the hair begins to grow back. However, with alopecia areata, it's possible to have unpredictable cycles of hair loss with or without regrowth.

Traction Alopecia

Signs of traction alopecia include thinning hair around the edges of your scalp. This is often due to tension on the scalp. For example, people who constantly braid their hair cause a lot of strain on the scalp. The constant pulling weakens the root and eventually, your hair begins to look thinner in those areas. Wearing box braids, cornrows, locks, or a tight ponytail contributes to traction alopecia.

This type of alopecia affects people who pull on their hair too much and is most noticeable along the hairline. Using chemicals, heat, putting your hair in tight buns, using hair extensions or weaves, and using hair rollers overnight all lead to traction alopecia. Be gentle on your scalp to take care of your hair follicles.

Alopecia Totalis

Alopecia totalis occurs when someone gradually loses all of their hair, leaving them bald. This type of alopecia is due to an autoimmune response that affects all of the hair on the scalp. There are possible genetic predispositions, although more research is underway for this form of advanced alopecia.

Alopecia Universalis

Alopecia universalis is a rare hair loss condition in which someone loses all of the hair on their body. This type of hair loss is a rare autoimmune disease. This affects hair from the scalp, inside the nose, around the eyes, and the rest of the body. Hair treatment for alopecia universalis typically begins as soon as the hair loss is noticeable. Steps to stimulating regrowth and increased hair density require time and patience.

The Ordinary Multi-Peptide Hair Density Serum

If you're concerned about hair loss or dealing with alopecia, there are easily accessible treatment options available for you. The Ordinary Hair Serum is well-known for improving hair density and treating the frustrating process of hair loss. The Ordinary hair growth treatment has become an industry favorite as stress levels seem to remain at an all-time high, especially due to the pandemic.

The Ordinary Multipeptide Hair Serum is a concentrated formula with multi-peptide complex ingredients. The Ordinary hair serum has countless success stories, helping people who deal with dry scalps and those who are trying to grow thicker hair. The Ordinary multi-peptide serum improves hair health without negatively affecting the scalp, which is a common issue with hair growth treatments. The ingredients are 100 percent organic and work on all hair and skin types.


A lack of biotin, a complex B vitamin, leads to hair thinning, hair loss, brittle nails, and skin rashes. Biotin has health benefits that hair, skin, and nail experts prioritize. This B vitamin, also known as vitamin H, is a complex water-soluble vitamin that allows the body to metabolize or convert food into energy. Insufficient amounts of biotin negatively affect the body’s ability to function properly.

Consuming natural biotin is vital to maintaining proper metabolic function and cell signaling, as well as healthy hair, skin, and nails. Examples of foods that are good sources of biotin include nuts, seeds, soybeans, legumes, whole grains, vegetables, bananas, mushrooms, fish, eggs, and organ meats.

Symptoms of biotin deficiency include developing skin rashes, having brittle nails, and experiencing hair loss. Fortunately, there are topical solutions to address hair thinning, which are especially beneficial if you already include biotin-rich foods in your daily diet or take a supplement. The Ordinary hair growth serum contains biotin, which studies have shown improves hair density in alopecia patients or those with related hair loss issues.

Wooden spoons holding dark and yellow liquid capsules.


The Ordinary hair serum contains caffeine which has a range of benefits for hair growth. According to hair, health, and wellness expert at Healthline, Valencia Higuera, "One 2007 laboratory study found that caffeine helped block the effects of DHT in male hair follicles. It stimulated hair shaft elongation, resulting in longer, wider hair roots. It also prolonged anagen duration, which is the hair growth stage."

What does this mean for those suffering from gradual hair loss or alopecia? There are positive results of using hair-density products that boast caffeine as an active ingredient.

The Ordinary multi-peptide hair density serum works to stimulate growth, improve scalp health, and revitalize your hair follicles. Caffeine hair treatments have shown signs of softer, fuller, and more vibrant hair for people suffering from certain types of alopecia. The topical application of caffeine for your hair has far-reaching benefits, including improved barrier function, follicular penetration, stimulation, and promotion of hair growth.

Spoon with coffee body scrub and scattered beans on wooden table, closeup


The Ordinary multi-peptide hair growth serum contains peptides, also known as polypeptides, which are amino acids found in the skin. Peptides are a type of protein, building blocks of cells, and they stimulate collagen. Your body uses the naturally occurring protein collagen to maintain the strength, elasticity, and health of your skin, bones, and connective tissues. Peptides stimulate collagen growth while improving blood circulation. A loss of sufficient blood circulation to your scalp results in smaller hair follicles and hair loss.

Peptides improve blood and oxygen circulation to areas of the scalp that are experiencing thinning hair or are gradually balding. Peptides also have a therapeutic effect on people who suffer from alopecia. Aside from improved circulation, peptides have shown hair growth regeneration and the enlargement of hair follicles. These benefits give your hair a fuller, thicker look. Who doesn't want that?

Photo of Peptides in powder and pill form


Redensyl is fairly new in the world of hair care, particularly in tackling hair loss, alopecia, and baldness. Redensyl is the best alternative to hair transplantation and comes from a patented organic solvent-free glycosylation process. This process involves adding molecules together, such as glycosyl radicals and a protein, thus forming a glycoprotein. Glycoproteins have diverse functions in the human body, including in the production of hair.

Glycosylation is a biochemical process to develop redensyl where biochemists synthesize an enzyme with an active molecule. This results in a unique hair treatment ingredient that works to decrease inflammation and stimulate hair growth. Redensyl is a water-soluble ingredient that is odor-free, preservative-free, and safe to use with your natural hair care products. It’s organic and derived from plant extracts that contain polyphenols, zinc, and glycine. All these ingredients work to maintain hair structure by promoting hair follicle division, delivering protein, and providing antioxidants.

For a full list of ingredients, check the label on the bottle you're thinking of purchasing. Find a full ingredient list in the product description. Understanding how the ingredients affect your scalp and skin is integral to maintaining and promoting healthy hair and skin.

How To Use The Ordinary Hair Growth Serum

There are several types of Ordinary hair serums to try. Each one has a slightly different consistency which requires different application methods. The multi-peptide hair density serum options are 100 percent organic and work for all hair types. Each one of The Ordinary hair serums is alcohol-free, silicone-free, and free of any allergens. This means it works wonders on any skin and hair type, including those with more sensitive scalps. Even with such gentle ingredients, it's important to perform a patch test before using a product all over your scalp.

Hair Growth Serum Multi-peptide Serum For Hair Density
$14.00 ($14.00 / Fl Oz)

by The Ordinary 

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02/24/2024 04:38 pm GMT

The Ordinary Hair Growth Serum Multi-peptide Serum For Hair Density

The Ordinary hair growth multi-peptide serum for hair density works for men and women, particularly those who suffer from various forms of alopecia and hair loss. This hair density serum is for thinning hair and works regardless of the origin.

The serum is thin and non-greasy, so you don't have to worry about your scalp appearing greasy or oily. The texture is so thin that you only need a little bit for effective application. Use it as part of your nighttime scalp and hair routine: make sure your hair and scalp are clean and dry, apply a few drops to your scalp, and gently massage the serum around the scalp using your fingertips. Use the serum in specific areas, such as your hairline, if you experience traction alopecia or in areas where you notice the most hair loss.

Hair Growth Serum for Thinning Hair (Men & Women)

by The Ordinary 

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The Ordinary Hair Growth Serum For Thinning Hair Volumizing Conditioner

The Ordinary hair growth serum for thinning hair works with all hair types in men and women. The formula reverses the signs of alopecia and hair loss while creating more volume. This hair serum was biochemically engineered from natural ingredients to support the strengthening of the hair shaft down to the root. It works to increase blood flow to the scalp, thus encouraging smooth hair growth.

The Ordinary hair growth serum for thinning hair volumizing conditioner works to repair damaged hair, lock in moisture, control frizz, and promote shine. It works to strengthen and repair brittle, dry, frizzy, overworked, and damaged hair, leaving you with smoother, fuller hair. This growth serum regrows hair up to three times faster than the normal speed and detoxifies the scalp. Made with natural ingredients, including ginger and biotin, this premium formula encourages healthy, strong, more resilient hair. It works to enhance the elasticity, firmness, and density of your hair.

After thoroughly washing and drying your hair, apply The Ordinary hair growth serum before bed. Apply the serum to your scalp and gently massage it around your head, specifically in places where you noticed the most hair thinning or hair loss. Allow the solution to be completely absorbed, and do not wash or treat your scalp or hair with any other products following this application.

100% Organic Cold-Pressed Moroccan Argan Oil 30ml

by The Ordinary 

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02/25/2024 03:32 pm GMT

The Ordinary 100% Organic Cold-Pressed Moroccan Argan Oil

The Ordinary hair serum includes 100 percent organic, cold-pressed Moroccan argan oil. The cold-pressing process preserves the integrity of the argan oil’s healthy fatty acids, vitamins, nutrients, phenols, and carotenes. Why include argan oil in The Ordinary hair density serum? Well, argan oil contains two healthy fatty acids, oleic acid, and linoleic acid — both of which support healthy skin and hair. Oleic acid may help with hair loss, making the hair strand softer and more resilient. Linoleic acid stimulates hair growth while promoting a healthy scalp. Argan oil works to reduce the dryness of the scalp and eliminate the appearance of flaking.

The Ordinary hair density serum with organic Moroccan argan oil traps moisture in the strands of hair, virtually eliminating frizzy or brittle-looking hair. It’s also excellent for combating dry or damaged hair caused by weather and rough handling. It’s simple to use and a little goes a long way. Put a few drops on your fingertips and slowly work the serum up from the ends. Watch in real-time as split ends disappear, and your hair becomes smooth to the touch. You don’t have to wash it out or use a blow dryer on it. Just gently work in until your strands are fully covered and allow the serum to absorb. Wait a few minutes for your hair to absorb the goodness, then style it as normal.

Why Do People Love The Ordinary Multi-Peptide Hair Density Serum?

Hair thinning, hair falling out, or hair loss is frustrating and increases your stress levels. Any emotional stress you are feeling manifests in increased shedding. Instead of falling victim to this hair-loss and stress cycle, stay positive and find solutions for your changing body. Especially when hair growth products like The Ordinary hair serum continue to have such successful results.

Most people who use The Ordinary multi-peptide hair density serum prefer to keep weekly track of their hair growth. For instance, take a picture of your hairline before your first application and take a picture again at least seven to fourteen days after. Track the density and growth of your hair along your Ordinary serum journey to gauge how effective it is for you, taking progress photos and appreciating your new and improved scalp.

Consider Your Overall Health

Hair thinning happens for many reasons, including vitamin D deficiency, failure to consume enough protein, stress, age, use of chemicals, heat treatments, mechanical damage, or hairstyles that pull too hard on the hair. Vitamin D deficiency affects approximately a billion people worldwide. Vitamin D is vital for immune function and the body’s ability to absorb calcium and phosphorous. A lack of vitamin D is a contributing factor in developing alopecia.

Protein is integral to your body’s ability to repair damaged cells and form new ones. Insufficient protein causes slowed hair growth or hair loss because the body is saving the protein stores you do have for other vital functions. A lack of protein in your diet will, over time, impact the density of your hair and the health of your nails. If you don't have enough protein to grow healthy hair and nails, what other parts of your body are in need of more protein?

Getting enough nutrition to maintain the health of your hair is just as important as maintaining healthy skin and nails. If you're fulfilling your nutritional needs and you still notice hair thinning, it’s time to invest in a hair treatment that works. The Ordinary Hair Serum has people boasting about the fantastic results. Following directions, remaining patient, and getting the right nutrition are the three most important things to growing a healthy head of hair.

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