Curl House Hair Nourishing Leave-In Conditioner

Curl House Hair Nourishing Leave-In Conditioner

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Overview

What it is

Leave-in conditioner with 15 ingredients that contains PHA

Cool Features

It is cruelty-free, fungal acne (malassezia) safe, and reef safe

Suited For

It has ingredients that are good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and better texture

Free From

It doesn't contain any harsh alcohols, parabens, silicones or sulfates

Fun facts

Curl House is from United States. This product is used in 1 routines created by our community.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Explained

Skin Conditioning, Solvent

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

Learn more about Water
Humectant, Skin Conditioning, Skin Protecting

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
Astringent, Emollient, Soothing

This botanical extract is also known as horsetail extract. It mainly acts as an emollient, skin soother, and astringent.

A study from 2023 found compounds in Equisetum Arvense showed significant anti-inflammatory effects in irritated keratinocytes (the main cell in your outermost layer of skin).

Another study using a cream with horsetail and soybean extract found 80% of participants showed at least a 26% improvement in forehead wrinkles after 8 weeks.

Animal research has shown topical Equisetum Arvense stimulated skin and tissue growth in mice.

The research so far is encouraging, but still in its early days. But it's a lovely supporting ingredient and can be a welcome addition to any routine.

Learn more about Equisetum Arvense Extract
Cleansing, Skin Conditioning, Tonic

Sage leaf extract is a culinary and medicinal herb with antibacterial, antioxidant, and soothing properties.

This ingredient is made up of 75-90% ursolic acid, a potent antioxidant and anti-inflammatory compound.

Astringent, Skin Conditioning, Soothing

This ingredient is more commonly known as nettle extract. It has soothing, antimicrobial, and antioxidant properties.

The antimicrobial properties of nettle come from its gallic acid content.

Antimicrobial, Masking, Skin Conditioning

Rosmarinus Officinalis Leaf Extract comes from rosemary. Rosemary is native to the Mediterranean.

While Rosmarinus Officinalis Leaf Oil can be volatile due to its fragrant properties, the fragrance components are usually removed in the leaf extract.

Rosemary Leaf Extract contains many antioxidants such as rosmarinic acid and caffeic acid. Rosemarinic acid, a compound found in rosemary leaf, has been found to help soothe skin conditions such as eczema and acne.

Learn more about Rosmarinus Officinalis Leaf Extract
Masking, Perfuming, Skin Conditioning

Anthemis Nobilis Flower Extract is from the Roman Chamomile flower. It helps soothe the skin and contains antioxidants.

Cleansing, Masking, Refreshing

Lavandula Angustifolia Flower Extract comes from the lavender plant.

Many components of lavender flowers are antioxidants, such as ferulic acid, caffeic acid, and several flavonoids.

Traditional Iranian folk medicine uses Lavender extract to help treat inflammation.

Lavender extract may have a scent.

It contains linalool, a known allergen. However, lavender extract contains less linalool than lavender essential oil.

Learn more about Lavandula Angustifolia Flower Extract

We don't have a description for Petroleum Distillates yet.

Solvent

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin. 

It’s often used to:

Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.

Learn more about Propanediol
Skin Conditioning

Bambusa Vulgaris Extract comes from bamboo plant. Bamboo extract is skin conditioning and soothing.

Bamboo extract has antioxidant properties. Antioxidants help fight free-radicals. Free-radicals are molecules that may damage your skin cells, such as pollution. The antioxidant property of bamboo also makes it great at healing wounds.

Bamboos are rich in Vitamin E, Vitamin B6, and copper.

A recent study found bamboo extract might interrupt the process of hyperpigmentation.

Learn more about Bambusa Vulgaris Extract

This ingredient is a preservative and often used for it's anti-static properties. You'll most likely see this ingredient in hair conditioners.

It does not cause irritation or sensitization in leave-on products at 1-5%.

Skin Conditioning

Gluconolactone is a PHA. PHAs are a great gentle alternative to traditional AHAs.

When applied, Gluconolactone has the same affect on skin as AHAs such as lactic acid. It helps dissolve the dead skin cells in the top layer of your skin. This improves texture and brightens the skin.

PHAs are more gentle than AHAs due to their larger structure. They do not penetrate as deeply as AHAs and take a longer time to dissolve dead cells. Studies show PHAs do not cause as much irritation.

Gluconolactone has some interesting properties:

In a 2004 study, Gluconolactone was found to prevent UV damage in mouse skin cells and has not been found to increase sun sensitivity. However, we still recommend wearing SPF daily.

This ingredient is is an created by reacting gluconic acid with an alcohol.

Learn more about Gluconolactone
Masking, Preservative

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

Learn more about Sodium Benzoate
Masking, Perfuming, Tonic

Lavandula Angustifolia Oil is more commonly known as lavender essential oil. It is considered a fragrancing ingredient.

Lavender imparts a famous scent. While the smell is lovely, this ingredient and may sensitize skin in topical products. This is because about 85% of the oil is made up of linalool and linalyl acetate.

When exposed to air, these two compounds become strong allergens. This ingredient exhibits cytotoxicity at low concentrations; amounts of 0.25% have been shown to damage skin cells.

A study from Japan found this ingredient caused lavender sensitivity after widespread exposure.

Lavender essential oil has some antimicrobial, antibacterial, and anti-inflammatory properties. However, the cons of this ingredient may outweight the pros.

More research is needed to confirm lavender essential oil's effects when used in aromatherapy.

Lavandula Angustifolia is known as the English Lavender and famous for creating purple fields in Provence, France.

Learn more about Lavandula Angustifolia Oil

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Where it's from

Curl House is a American brand

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The data we've presented on this page has been verified by a member of the SkinSort Team.

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· Updated July 16, 2025 Added by CJ_754