Function of Beauty Curly Hair Shampoo Review 2026: Worth It?

Curly hair asks for a lot. It wants moisture, definition, gentle cleansing, and zero crunch. Most drugstore shampoos fail at least one of those tests.

Function of Beauty stepped into that gap with a curl focused formula built around chia seed extract, and the brand now sells it on Amazon at a price that undercuts most salon bottles.

So does it actually work on real curls, or is it just pretty packaging with a peach scent? I bought a bottle, used it for six weeks across different wash routines, and tracked what happened to my curl clumps, my scalp, and my frizz halo.

In a Nutshell:

• It cleanses gently and rinses clean. The sulfate free base lifts sweat, oil, and light product buildup without stripping your strands raw. My scalp felt fresh instead of tight. This is the shampoo’s strongest quality by a wide margin.
• Chia seed extract adds real definition. Chia is rich in polysaccharides that form a flexible film on the hair fiber. My curl clumps held their shape better on day two, and my S waves looked more sculpted after air drying.
• The Nude Peach scent is polarizing. Notes of peach nectar, lemon, and jasmine hit hard in the shower. Some people love it. Fragrance sensitive users will find it too loud.
• It is not moisturizing enough on its own. Type 4 coils and very dry, bleached hair will need the matching conditioner plus a leave in. Used alone, this shampoo can leave hair feeling coarse.
• Price and value are excellent. Around ten dollars for 11 ounces puts it well under Ouidad, Curlsmith, and DevaCurl. A 22 ounce bottle and multipacks lower the cost per ounce further.
• Volume loss is the recurring complaint. Multiple long term users report limp roots after several weeks. I noticed slightly softer root lift myself, though nothing dramatic.

Overall rating: 4.2 out of 5. Great value, solid definition, average moisture.

Function of Beauty Curly Hair Shampoo

Last update on 2026-09-10 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

This is the Routine Essentials version of the formula, sold ready made in an 11 ounce bottle. It differs from the brand’s original custom quiz product, which let you add boosters and pick your own scent and color. The Amazon version skips the quiz and gives you one fixed curl formula at a fixed price.

The bottle carries a 4.4 star rating across roughly 139 reviews and holds an Amazon’s Choice badge in the shampoo category. It also ranks near the top 600 in Hair Shampoo, which tells you people are actually repurchasing it.

The core specs are simple. Sulfate free, paraben free, silicone free, vegan, and cruelty free. Color safe for dyed hair. Chia seed extract sits as the active ingredient. The scent is Nude Peach. The brand markets it for type 3 hair, meaning loose spirals through tight ringlets.

The silicone free part matters more than people realize. Curly Girl Method followers avoid non water soluble silicones because they coat strands and block moisture. This formula skips them completely, so it fits a CGM routine without hunting through the ingredient list.

Sizes include 11 ounces, 22 ounces, a two pack, and a six pack. The 22 ounce bottle offers the best value if you already know the formula agrees with your hair.

Unboxing Experience: What Actually Arrives

My bottle arrived in a plain Amazon mailer with a light layer of bubble wrap. No branded box, no tissue paper, no sample sachets. Function of Beauty’s direct site ships with more presentation. The Amazon route is purely functional.

The bottle itself feels better than the price suggests. It uses a soft matte plastic with a slight squeeze to it, so you can push product out without wrestling the cap. The flip cap snaps shut with a satisfying click and stayed sealed through six weeks of wet hands. No leaks, no drips down the side.

The label is minimal. Cream background, small serif type, a tiny chia icon. It looks like something from a boutique brand rather than a mass retailer. It also gets slippery when wet, so keep it away from the edge of the tub.

Opening it for the first time, the peach scent escapes immediately. It filled my bathroom before I even squeezed any out. The texture surprised me most. It pours as a thick, pearly white cream rather than a thin gel. A quarter sized amount felt substantial in my palm.

One small gripe. The bottle has no printed batch date or open jar symbol on the front, so tracking shelf life takes effort. You have to check the base of the bottle for a stamped code.

Key Ingredients Inside the Formula

The star ingredient is Salvia hispanica seed extract, better known as chia seed extract. Chia is loaded with polysaccharides that stick lightly to the hair fiber. They form a thin, flexible film that supports the curl pattern instead of stiffening it. That film is why definition improves without any crunch.

Flax seed extract, listed as Linum usitatissimum, appears alongside chia. Flax has a long history in curly hair care as a natural definer. Home flaxseed gels work on the same principle. Its inclusion here adds slip and light hold.

Guar hydroxypropyltrimonium chloride handles conditioning. It is a plant derived cationic polymer that reduces static and makes detangling easier. Think of it as a silicone alternative that rinses clean.

The cleansing system uses mild surfactants rather than sulfates. That means no sodium lauryl sulfate and no sodium laureth sulfate. The tradeoff is a softer lather, which I will cover shortly.

Lauric acid and shea derived emollients round out the moisture side. Glycerin pulls water into the strand.

What is missing matters too. No silicones, no parabens, no dyes, no drying alcohols. The formula is vegan and never tested on animals.

The fragrance load is the only ingredient concern. It sits fairly high in the list, so reactive scalps should patch test first.

Top 3 Alternative for Function of Beauty Curly Hair Shampoo

Last update on 2026-09-10 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

Shea Moisture Coconut and Hibiscus Curl and Shine Shampoo

Last update on 2026-09-10 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

Cantu Shea Butter Sulfate Free Cleansing Cream Shampoo

Last update on 2026-09-10 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

Not Your Mother’s Curl Talk Shampoo

How It Performs on Type 3 Curls

I have loose to medium spirals, medium density, and a scalp that gets oily by day three. That is squarely in the type 3 range this shampoo targets.

First wash impressions were mixed. My hair felt clean but slightly squeaky at the roots. By the third wash, once buildup from my previous silicone heavy shampoo cleared, the results improved sharply. Curl clumps formed more easily in the shower. My hair took less time to air dry.

Definition was the clearest win. My spirals looked tighter and more separated, with less of that undefined puffy section at the crown. Second day hair held up noticeably better than with my old shampoo. I could refresh with water and a little leave in rather than restyling everything.

Frizz control landed at average. On dry days, my halo stayed calm. On humid days, it returned within a few hours. This shampoo will not carry you through summer humidity alone.

Moisture is where it fell short. Used with only the matching conditioner, my ends felt slightly rough by day four. Adding a deep mask once a week fixed the problem completely.

Root volume dropped a little over six weeks. Nothing alarming, but my roots sat flatter than they did before. Several long term users report the same thing.

Lather, Slip and Wash Day Feel

Sulfate free shampoos usually disappoint on lather. This one performs better than most. A quarter sized amount produced a soft, creamy foam that spread across my scalp without much effort. It is not the dense meringue you get from a sulfate formula, but it is enough to feel like you are actually washing.

I found two washes worked best. The first pass barely foamed because it was busy breaking down oil. The second pass lathered properly and covered the whole scalp. If you use heavy gels or oils, plan for that double cleanse.

Slip is decent while the product sits on your hair. My fingers moved through mid lengths without snagging. Detangling in the shampoo stage is still not comfortable though. Save your detangling for the conditioner step.

Rinsing is fast and clean. No film, no waxy residue, no weight. My hair felt light and squeaky clean at the roots and soft through the mid lengths.

The scent lingers faintly after drying. By the next morning it fades to almost nothing.

One practical note. The thick texture means you use less than you expect. My 11 ounce bottle lasted about eleven weeks with two washes per week. That works out to strong value per wash.

Pros and Cons of Function of Beauty Curly Hair Shampoo

Here is the honest balance sheet after six weeks of testing.

Pros

• Genuinely gentle cleansing. The sulfate free base removes oil and buildup without that stripped, tight feeling. Color treated curls stay safe.
• Real curl definition from chia and flax. Clumps hold better and last into day two or three. No crunch, no cast, no stiffness.
• Lathers well for a sulfate free formula. You get a creamy foam that actually spreads, which is rare in this category.
• Curly Girl Method friendly. No silicones, no sulfates, no parabens, no drying alcohols. It fits straight into a CGM routine.
• Strong price per ounce. Around ten dollars for 11 ounces, with subscribe and save discounts and larger sizes available.
• Clean, well built bottle. The flip cap seals properly and the squeeze bottle dispenses easily with wet hands.

Cons

• Not moisturizing enough alone. Very dry, coarse, or bleached hair needs a mask or leave in alongside it.
• Fragrance is heavy. The peach and jasmine blend is strong in the shower. Sensitive noses and reactive scalps may struggle.
• Possible volume loss over time. Several long term users report limp roots after weeks of use. I saw a mild version of this.
• Average humidity performance. Frizz returns on damp days. This is not a humidity proof formula.
• Requires a double wash. One pass rarely cleans a full scalp properly.
• No custom options on Amazon. The quiz based personalization only exists on the brand’s own site.

What This Shampoo Does Not Do Well

Authentic reviews name the weak spots, so here they are without softening.

It does not moisturize deeply. The formula cleans and defines. It does not repair. If your hair is bleached, heat damaged, or naturally coarse, this shampoo will leave you wanting more. You will need a weekly mask. Some users pair it with a shea butter treatment between shampoo and conditioner for exactly this reason.

It does not suit every curl type despite the marketing. Fine haired users report a strange coarse and elastic feel with limp results. Type 4 coily users often need something richer. The formula sits in a narrow sweet spot around medium density type 3 hair.

It does not fix scalp problems. The Amazon version has no scalp soothing boosters. If you deal with flaking or psoriasis, this bottle alone will not help.

It does not hold curls in high humidity. There is no polymer strong enough to fight a muggy afternoon here. You will need a gel or mousse on top.

It does not guarantee results at first. My first two washes were underwhelming. Give it three to four washes before you judge it.

It does not offer transparent batch dating on the label. Minor, but worth noting for anyone tracking product age.

Pairing With the Matching Conditioner

Last update on 2026-09-10 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

The shampoo works noticeably better with its matching conditioner. Function of Beauty built the pair to work together, and the conditioner carries shea butter for the moisture the shampoo lacks.

Texture wise, the conditioner is thicker and richer than the shampoo. It coats strands quickly and gives strong slip for detangling. I worked through my hair with a wide tooth comb in under two minutes, which is fast for my density.

Left on for five minutes, it softened my ends and calmed my frizz halo. My curls came out springier and shinier than with shampoo alone. The two together cost around twenty dollars, which is still cheaper than a single salon bottle.

Slip is the conditioner’s strength. Deep moisture is not. Reviewers with drier hair say the slip does not go far enough for heavy tangles. Adding a shea mask between the shampoo and conditioner solves it.

The scent matches the shampoo, so the peach note doubles up. If the fragrance already feels strong, using both will amplify it.

My honest take: buy the pair, not the shampoo alone. The shampoo on its own is a two thirds finished routine.

Price and Value in 2026

At the time of writing, the 11 ounce bottle sits at $9.97, roughly 91 cents per ounce. Subscribe and save drops it to $9.47, and stacking five items in one delivery pushes it to $8.47, or about 77 cents per ounce.

Compare that to the competition. Ouidad Curl Quencher runs several times higher per ounce. Curlsmith and DevaCurl sit in a similar premium bracket. Function of Beauty delivers a silicone free, sulfate free, vegan formula at drugstore money. That is the headline value story.

Against true drugstore rivals, the picture tightens. Shea Moisture and Cantu often cost less per ounce and offer more moisture. Not Your Mother’s Curl Talk competes closely on price.

The 22 ounce bottle and the multipacks improve value further. If you already know the formula works for your hair, size up. If you do not, start with the 11 ounce bottle.

Longevity helps the value case. The thick texture means small amounts go far. My bottle lasted eleven weeks at two washes per week, so the real cost was under a dollar per wash.

One caveat. The Amazon version has no custom boosters. If personalization is what drew you to the brand, the direct site costs more but offers more control.

How to Use It for Best Results

Getting the most from this shampoo takes a small amount of technique.

Start with a proper pre rinse. Let warm water soak your hair for a full minute. Sulfate free formulas need saturated hair to spread properly.

Use a quarter sized amount for shoulder length hair. Focus it on your scalp only, not your ends. Massage with your fingertips for thirty seconds. Skip your nails to protect your scalp.

Rinse, then repeat. The second pass is where the real cleaning happens. This double wash step made the biggest difference in my testing.

Follow immediately with the matching conditioner. Leave it on for three to five minutes. Detangle during this window with a wide tooth comb, working from ends to roots.

Once a week, add a deep mask between the shampoo and conditioner steps. This covers the shampoo’s moisture gap.

Rinse with cool water at the end. It helps close the cuticle and boosts shine.

Style on soaking wet hair. Apply a leave in, then a gel or cream. Scrunch upward to encourage clumps.

Air dry or diffuse on low heat. High heat undoes the definition the chia extract builds.

Wash twice a week at most. Curly hair rarely needs more.

Who Should Buy It and Who Should Skip It

Buy it if you have medium density type 3 curls, a scalp that gets oily, and a budget under fifteen dollars. It suits people transitioning to the Curly Girl Method because it removes the guesswork on silicones and sulfates. Color treated curls are safe with it. People who want definition without a hard cast will be happy.

It also fits anyone who wants a clean formula without paying salon prices. Vegan and cruelty free credentials are genuine.

Skip it if your hair is very dry, coarse, bleached, or type 4 coily. Richer options from Shea Moisture and Cantu serve those textures better. Fine haired users should be cautious given the volume complaints.

Skip it if you are sensitive to fragrance. The peach and jasmine blend is strong and unavoidable.

Skip it if you need scalp treatment. There is no soothing booster in the Amazon version.

Skip it if humidity dominates your climate and you refuse to use gel. This shampoo needs styling support to hold up.

My final verdict is 4.2 out of 5. It is a smart, well priced, genuinely gentle curl shampoo with real definition benefits. It is not a moisture powerhouse and it is not for every texture. Buy it with the conditioner, add a weekly mask, and you have a strong routine for about twenty dollars.

FAQs

Is Function of Beauty Curly Hair Shampoo sulfate free?

Yes. The formula contains no sodium lauryl sulfate and no sodium laureth sulfate. It uses milder plant based surfactants instead. It is also paraben free, silicone free, vegan, and cruelty free, which makes it suitable for the Curly Girl Method.

Does it cause hair loss or thinning?

There is no ingredient in the formula known to cause hair loss. Some long term users report reduced volume and flatter roots after several weeks. A smaller number report thinning. Most of these accounts relate to the older custom formula rather than the current Amazon version. If you notice increased shedding, stop use and speak with a dermatologist.

What does it smell like?

The scent is called Nude Peach. It blends peach nectar, zesty lemon, and jasmine. The fragrance is strong in the shower and fades to a faint trace once your hair dries. The Amazon version does not let you change the scent.

Will it work on type 4 coily hair?

It will clean type 4 hair gently, but the moisture level is too light for most coils. Function of Beauty sells a separate coily formula, which is a better match. Cantu and Shea Moisture also serve type 4 textures well.

How often should I use it?

Twice a week suits most curly hair. Very oily scalps can go three times. Do a double wash each time for proper cleansing.

Is the Amazon version the same as the custom one?

No. The Amazon version is the Routine Essentials formula, sold ready made with a fixed scent and no boosters. The custom version from the brand’s own site lets you pick boosters, scent, and color, and costs more.

Do I need the matching conditioner?

You do not need it, but the shampoo performs much better with it. The shampoo cleans and defines. The conditioner supplies slip and moisture. Together they form a complete wash day routine for around twenty dollars.