Curly Hair Ingredient Guide: Understanding What Ingredients Actually Do for Curls
Curly hair products often contain a wide range of ingredients, and ingredient lists can sometimes look more complicated than they really are. In practice, most ingredients fall into a handful of functional groups, each playing a specific role in supporting curl hydration, structure and definition.
If you’ve ever looked at an ingredient list and wondered what half of it means, you’re not alone. Let us explain how these ingredients tend to work together, and why they appear so often in curly hair products.
Once you understand the main ingredient groups, reading product labels becomes much easier. Rather than focusing on trends or individual ingredients in isolation, you begin to recognise how formulations support curl formation, moisture balance and long-lasting definition.
Most curly hair ingredients fall into six broad groups. Below we walk through them in the same order you’ll find them in the Curls Naturally Ingredient Glossary.
A Note From the Curl Chair
Before we dive too deeply into ingredients, it’s worth remembering something important.
Curly hair is first and foremost a natural fibre. Ingredients in products can support hydration, improve slip, encourage curl formation and help maintain definition — but they do not fundamentally change the structure of the hair itself...nor do they magically make outcomes occur.
What really matters along with ingredients in formulas is technique.
Techniques for cleansing, conditioning, applying styling products, drying the hair, and caring for the fibre between wash days all play an equally important role in how curls behave.
Water sits at the centre of this process, and styling products, for example, work by helping curls organise themselves into consistent groupings as the hair dries. But inappropritae or poor technique can make a great product not give a great result, so methods really do matter!
In other words, ingredients are important — but they work best when they are working alongside good technique and thoughtful fibre care.
Understanding this helps explain why different products behave differently, and why the same product can work beautifully for one head of curls and less so for another.
Understanding Ingredient Lists (INCI)
Cosmetic ingredient lists follow an international naming system called INCI — International Nomenclature of Cosmetic Ingredients. This standardised system allows ingredients to be listed consistently across different countries and cosmetic regulations.
Ingredients are listed in descending order of concentration, which means the ingredients that make up the largest portion of the formula appear first.
In many hair products:
• The first 3–5 ingredients usually make up the majority of the formula
• Ingredients in the middle of the list provide conditioning, film-forming or supporting functions
• Ingredients at the end of the list are typically present in very small amounts, often below 1%
These smaller-percentage ingredients may include preservatives, fragrance components, botanical extracts or stabilising ingredients.
Because of this system, ingredient lists are helpful for understanding what types of ingredients are present, but they do not always reveal the exact proportions or how those ingredients interact within the finished formula.
This is one reason why two products with similar ingredient lists can behave quite differently on curly hair.
Once you become familiar with the main ingredient groups, reading product labels becomes far less mysterious. Rather than focusing on single ingredients in isolation, it becomes easier to recognise how different components work together within a formulation.
Many curl products combine several ingredient groups at once — supporting hydration, curl structure, slip and definition at the same time.
If you would like to explore individual ingredients in more detail, you can browse the Curls Naturally Ingredient Glossary, where each ingredient is explained along with its role in curl care formulations.
Moisture-Supporting Ingredients
Helping Maintain Hydration Within the Hair Fibre
Curly hair often benefits from ingredients that help maintain moisture within the fibre. These ingredients support elasticity and softness while helping reduce the dehydrated state curly hair can get to between wash days.
Some ingredients work by attracting water, while others help retain moisture that is already present in the hair.
Examples include:
• Glycerin
• Sodium Hyaluronate
• Aloe Vera (Aloe Barbadensis Leaf Juice)
• Inulin
Maintaining the right balance of hydration helps curls remain more resilient, responsive and easier to style.
Barrier-Supporting Ingredients
Helping Reinforce the Hair’s Natural Lipid Barrier
Certain ingredients help support the hair’s natural protective barrier, which is partly made up of lipids (natural fats) that sit between and along the cuticle layers of the hair fibre.
These lipids help keep the cuticle flexible, reduce friction between fibres and assist the hair in maintaining balanced moisture movement.
When the lipid layer becomes depleted through weathering, colouring, heat styling or repeated mechanical stress, the hair fibre can start to feel noticeably drier and more brittle. Many people describe this sensation as the hair feeling crisp, rough, or unusually resistant to water when wetting the hair, despite it being dry and having what would be a higher porosity than areas of the hair strands closer to the scalp (ie; much less weathered due).
In reality, the fibre is not truly repelling water, but disruption of the lipid layer can cause water to spread unevenly across the cuticle surface.
Barrier-supporting ingredients help reinforce this lipid environment and support smoother, more resilient fibres.
Examples include:
• Ceramides
• Phospholipids
These ingredients are increasingly included in modern curl-care formulas designed to support both hydration and structural resilience.
Film-Forming Ingredients
Supporting Curl Definition and Structure
Film-forming ingredients create a very light, flexible structure around the hair fibre. This helps curls hold their shape, maintain definition and resist frizz caused by humidity.
Different film-formers create different levels of hold. Some create a stronger structure (often called a cast) while others support softer, more flexible definition. Once the hair is dry, that cast can often be softened simply by scrunching the hair.
Examples include:
• Pullulan
• Maltodextrin / VP Copolymer
• Hydroxyethylcellulose
• PVP
These ingredients are commonly found in styling gels and creams designed to support curl formation and definition without heavily coating the hair.
Conditioning Agents
Helping Improve Slip, Smoothness and Manageability
Conditioning ingredients help smooth the surface of the hair and reduce friction between strands. This can make detangling easier and help curls feel softer and more manageable during styling.
Examples include:
• Behentrimonium Chloride
• Cetrimonium Chloride
• Hydrolyzed Jojoba Esters
These ingredients are commonly found in conditioners, leave-ins and some styling products where slip and manageability are important.
Botanical Extracts
Plant-Derived Ingredients That Support Fibre Condition
Botanical extracts are widely used in curly hair formulations. Many contain naturally occurring compounds such as antioxidants, fatty acids and minerals that support the overall condition of the hair fibre.
Examples include:
• Chia Seed Extract
• Nettle Extract
• Rosemary Extract
• Sage Extract
• Resurrection Plant extract
• Baobab Seed Oil
• Murumuru Butter
Botanical ingredients can serve different functions depending on the formulation, but they are often included to support hydration, smoothness and overall fibre condition.
Preservatives and Stability Ingredients
Keeping Formulas Safe and Stable
Many products also contain ingredients that help maintain product safety and stability over time. These ingredients help prevent microbial growth and ensure the formula performs consistently throughout its shelf life.
Examples include:
• Sodium Benzoate
• Gluconolactone
• Citric Acid
These ingredients are typically present in very small amounts and play an important role in keeping cosmetic products safe to use.
Common Ingredient Myths in Curly Hair Care
Curly hair care attracts its fair share of strong opinions about ingredients. While some of these ideas come from genuine experiences, others can become oversimplified or misunderstood over time.
Understanding what ingredients actually do within a formulation can help bring a little more balance to the conversation.
Myth: The Right Ingredient Will Fix Everything
No single ingredient can transform curls on its own. Curl behaviour depends on many factors including fibre structure, density, strand width, styling technique and environmental conditions.
Hair responds best when the products used, along with the techniques employed to apply them and dry them, support the natural behaviour of the hair rather than trying to hide or override it.
Myth: Gels Are Bad for Curly Hair
Many people worry that gels will make curls hard or crunchy. In reality, gels are often one of the most useful tools for maintaining curl definition and reducing frizz.
Most gels create a temporary structure around curl groupings while the hair dries. Once dry, that cast can usually be softened by gently scrunching the hair. For additional softness one can also apply a leave-in conditioner or cream before the gel of choice.
Myth: Ingredient Lists Tell the Whole Story
Ingredient lists show what is present in a product, but they do not reveal everything about how a formula behaves. The balance between ingredients, the concentration used and the way ingredients interact with each other all influence how a product performs.
This is why two products with similar ingredient lists can behave quite differently on curls.
The Curly Girl Method (CGM)
Many curly-haired people first begin learning about ingredients through the Curly Girl Method (CGM) — a hair care philosophy written by Lorraine Massey in her bestselling book Curly Girl: The Handbook, and later expanded in her subsequent titles Silver Hair: A Handbook and Curly Kids: The Handbook.
Over the years the Curly Girl Method has been widely discussed and shared across blogs, forums and social media. As often happens when ideas travel across the internet, parts of the original guidance have sometimes been simplified, adapted or occasionally misinterpreted along the way, which can make it difficult to know exactly what the original method intended.
For that reason, I have always encouraged people who are interested in the Curly Girl Method to read Lorraine’s books and follow her work directly. Learning from the original source provides the clearest understanding of the philosophy and techniques behind the method.
Among other things — including philosophy, understanding, technique and styling methods — the Curly Girl Method encourages people to avoid certain ingredients that may interfere with hydration or cause buildup over time.
These mainly include:
• sulphate cleansers (see below)
• silicones (see below)
• heavy waxes and mineral oils
directly applied oils and butters
For many people beginning their curl journey, these guidelines can be extremely helpful in identifying existing products that may be working against their hair rather than supporting it.
At Curls Naturally, I still consider these guidelines a useful starting point, particularly for people wanting to simplify their routines and better understand what might be affecting their curls.
My own curl education included training in the Curly Girl Method directly under Lorraine Massey in 2019, and that experience continues to inform the way I approach curly hair care today.
Where a product falls outside of CGM guidance, I make that clear so customers can decide for themselves whether it fits comfortably within their own curl routine.
Silicones in Hair Products
Silicones are a group of ingredients commonly used in hair care to create smoothness, shine and slip. They work by forming a coating over the hair fibre, which can reduce friction and make hair feel temporarily softer and easier to detangle.
Silicones are also widely used outside of hair care in products such as furniture polish, car polish and waterproofing treatments for wood, where their ability to create a smooth, water-resistant surface is particularly useful.
For this reason, silicones are not something I am personally a fan of using in curly hair products. Curly hair generally benefits from allowing water to move freely in and out of the fibre, and heavy silicone coatings can sometimes interfere with that process.
If you are checking ingredient lists and want to identify silicones, some common names include:
• Dimethicone
• Amodimethicone
• Cyclopentasiloxane
• Cyclomethicone
• Trimethicone
Learning to recognise these names can help you decide whether a product aligns with your own curl care preferences.
Sulphates in Hair Cleansers
Sulphates are cleansing ingredients that create the foaming action many people associate with shampoo.
They are very effective at removing oil, product buildup and environmental residue from the hair and scalp.
Common sulphates include:
• Sodium Lauryl Sulfate (SLS)
• Sodium Laureth Sulfate (SLES)
However, sulphates can also be quite harsh cleansers. Because they are very effective at removing oils and residues, they can sometimes strip too much natural moisture from the hair fibre.
For curly hair — which often already struggles to retain hydration — frequent use of strong sulphate shampoos can leave the hair feeling dry, rough or difficult to manage.
For this reason, curl-focused cleansing focusses on being either no-lather cleansers, low-lather cleansers, or when shampoos are used they contain gentler surfactants designed to cleanse the scalp while still supporting hydration and curl structure.
Oils in Curly Hair Care
Oils are widely used in curly hair products because they can provide softness, shine and lubrication between fibres.
When oils are included inside balanced formulations, they can support conditioning and help smooth the cuticle surface.
Examples include:
• Baobab Oil
• Jojoba Esters
• Murumuru Butter
• Sunflower Oil
However, very oil-heavy routines can sometimes interfere with hydration.
Hair fibres rely on water as the primary source of flexibility and elasticity. When large amounts of heavy oils are applied directly to the hair, they can create a barrier that slows the movement of water into the fibre.
For some curl types this may make the hair feel smoother initially, but over time it can leave the hair feeling dry, coated or difficult to hydrate.
This is why many modern curl formulations aim for balanced formulas that support hydration rather than sealing the fibre away from water.
The Curls Naturally Approach
At Curls Naturally, every product we stock is selected through real-world curly hair specialist experience here in New Zealand. Ingredient knowledge is one part of that process, but understanding how those ingredients behave on real curls is equally important.
If you’re ever unsure how to interpret an ingredient list or choose between products, feel free to reach out.