How to Read Cosmetic Labels: A Practical Guide for Pros
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Time to read 9 min
Product labels are meant to be informative, but a wall of text with Latin names and chemical compounds makes it easy to tune out and trust the marketing instead. That's a problem if you're a professional - the products you stock and use on clients are a direct reflection of you and your shop, and the gap between what a brand says on the front and what's actually inside can be significant.
This guide covers how ingredient lists are structured, how to spot red flags common in salon products, and what good formulation looks like by comparison.
How Ingredient Lists Work
You don't need a chemistry degree to read a product label. You just need to understand a few rules and know what to look for.
The order matters. Ingredients are listed in descending order by weight. The first ingredient makes up the largest percentage of the formula. The first five or six ingredients typically account for 80% or more of what's in the jar. If a brand brags about an ingredient that's buried at the end of the list, that tells you something.
The 1% rule. Once you get to ingredients that make up less than 1% of the formula, they can be listed in any order. This is where you'll find preservatives, fragrance, and active botanicals. Color additives are always listed last, regardless of concentration.
The fragrance exception. There's one major gap in this system: fragrance. US law treats fragrance formulas as trade secrets, so "Fragrance" or "Parfum" can appear as a single line item hiding dozens of undisclosed chemicals. More on this below.
INCI naming conventions. INCI (short for "International Nomenclature of Cosmetic Ingredients") is the standardized naming system required by the FDA and regulatory bodies worldwide so the same ingredient has the same name on every label, regardless of brand or country. Botanicals are listed first in Latin - Water is listed as "Aqua". Salt is "Sodium Chloride" - followed by the common English name in parentheses:
- Jojoba Oil appears as: Simmondsia Chinensis (Jojoba) Seed Oil
- Seaweed Extract appears as: Macrocystis Pyrifera (Seaweed) Extract
If you only see a Latin name without an English translation, or vice versa, the product may not be following proper labeling conventions.
Start With Water
The first ingredient on most styling products is Aqua (water). Whether it's there - and what comes after it - tells you a lot about what you're working with.
Water-Based vs. Oil-Based
Water-based formulas typically perform better, especially when it comes to hair styling products. They're lighter, wash out easier, and don't clog follicles or build up on the scalp. But water is where bacteria grow, so these products need a preservation system to stay stable. When you see Water or Aqua listed first, look at what's preserving it. That matters. (More on this in the Red Flags section.)
Oil-based formulas have no water, so they don't need preservatives. This makes them easier and cheaper to make. But the tradeoff is performance. Oil-based pomades - usually built on petrolatum or mineral oil - tend to be greasy, don't wash out easily, and sit on top of the hair rather than working with it.
Hydrosols take water-based a step further. Some botanical products use plant waters (like Santalum Album Hydrosol or Rosa Damascena Flower Water) as their base instead of plain water. Hydrosols carry trace amounts of essential oils and plant compounds, so they're doing more than just providing moisture.
What to Look For in a Preservation System
Good preservation systems use ingredients like Phenylpropanol, Propanediol, Caprylyl Glycol, and Tocopherol - plant-derived compounds that fight bacteria while also conditioning hair and skin. Botanical options include grapefruit seed extract (Citrus Grandis Seed Extract), rosemary extract (Rosmarinus Officinalis Leaf Extract), and vitamin E.
Bad preservation systems use formaldehyde-releasing chemicals - preservatives that slowly release a known carcinogen into the product. These are covered in detail in the Red Flags section, but the short version: avoid DMDM Hydantoin, Quaternium-15, Imidazolidinyl Urea, and Diazolidinyl Urea.
Packaging Matters
Biophotonic glass (the deep violet glass that Church California uses) blocks the wavelengths of light that degrade botanical ingredients. It measurably extends shelf life and preserves the potency of plant compounds, which means brands using it can often rely on gentler preservation systems.
Products That Don't Need Preservatives
Serums and oils are typically anhydrous (water-free). No water means no bacterial growth, which generally speaking, means that no preservatives are needed.
Church California's hair styling and skincare lines come in biophotonic glass packaging
The Fragrance Loophole
There's one major exception to ingredient transparency that you need to know about.
Under US law, fragrance formulas are considered trade secrets. This means that a company can list "Fragrance" or "Parfum" as a single ingredient, hiding dozens of individual chemicals inside that one word. A single fragrance listing can contain 30, 50, or 100+ undisclosed chemicals, including phthalates (endocrine disruptors used to make scent "stick" and reduce stiffness in hairsprays).
The EU requires disclosure of 26 known fragrance allergens. The US requires nothing.
When you see "Fragrance" or "Parfum" on a label without any further detail, you're looking at a black box. You have no way of knowing what's actually in it.
Note: Church California products use only essential oils for scent. Every oil is listed by name on the label. We never use the words "fragrance" or "parfum" on our labels.
Red Flags: Ingredients to Watch For
These are the ingredients you'll find in a significant percentage of the styling products, gels, pomades, and hairsprays on barbershop and salon shelves. Knowing what they are helps you make informed decisions about what you stock and what you use on clients.
Petroleum-Derived Ingredients
Petrolatum / Mineral Oil / Paraffin
INCI names: Petrolatum, Mineral Oil, Paraffinum Liquidum
Refined petroleum byproducts. They're cheap, which is why they're everywhere. They create a film that can trap bacteria and clog follicles. They have no nutritional value for hair or scalp. Many oil-based pomades use petrolatum as their primary ingredient because it's inexpensive and provides slip.
PVP/VA Copolymer
INCI names: VP/VA Copolymer, PVP
Petroleum-derived plastics used as film-formers for "hold." Covered in more detail below under Plastic Film-Formers.
PEG Compounds
INCI names: PEG-2, PEG-40, PEG-100, or any ingredient starting with "PEG-"
PEGs (polyethylene glycols) are used as thickeners and emulsifiers. The concern is contamination: PEG compounds can contain trace amounts of 1,4-dioxane (a probable carcinogen, banned in Canada) and ethylene oxide (a known carcinogen). A 2008 study found 1,4-dioxane in 46% of products labeled "natural" or "organic." The smaller the number after PEG, the more easily it absorbs into skin.
Formaldehyde-Releasing Preservatives
This is the big one. These preservatives do exactly what the name suggests: they slowly release formaldehyde gas into the product over time. Formaldehyde preserves by killing microbes. It also happens to be a known human carcinogen, classified by both the International Agency for Research on Cancer and the US National Toxicology Program. It's linked to nasopharyngeal cancer, sinonasal cancer, and leukemia.
DMDM Hydantoin — The most common. Found in shampoos, conditioners, and styling products. Has been the subject of class action lawsuits alleging links to hair loss and scalp irritation. Suavecito Original Pomade - one of the most widely distributed pomades in barbershops - contains DMDM Hydantoin.
Quaternium-15 — Releases the most formaldehyde of the common FRPs.
Imidazolidinyl Urea / Diazolidinyl Urea — Often combined with parabens. Diazolidinyl urea is particularly aggressive.
2-Bromo-2-Nitropropane-1,3-Diol (Bronopol) — Less common now but still found in some products. Can also form nitrosamines (another class of carcinogens) under certain conditions.
Why this matters for salon professionals:
Formaldehyde is a sensitizer. Repeated exposure increases your likelihood of developing an allergic reaction - and once you're sensitized, you stay sensitized. Future exposures, even at lower concentrations, can trigger contact dermatitis, eczema, respiratory issues, and scalp irritation. A client uses a product once or twice a week. You're working with these products all day, every day. The exposure adds up.
How bad is it? A 2023 Washington State Department of Ecology study tested 30 hair products containing DMDM hydantoin. Formaldehyde levels ranged from 39 ppm to 1,660 ppm. The highest was Shine 'n Jam Extra Hold Conditioning Styling Gel - a popular product for braids, twists, and edge control. For context: concentrations as low as 200 ppm can cause allergic reactions. Twenty-four of thirty products exceeded that threshold.
The regulatory picture: The EU has banned formaldehyde in cosmetics outright. Washington State became the first US state to ban all formaldehyde-releasing preservatives in 2023, followed by Oregon, California, Maryland, and Vermont. The industry is moving - but slowly. Many products on shelves still contain these ingredients.
Plastic Film-Formers (Not Preservatives, But Worth Knowing)
VP/VA Copolymer / PVP
INCI names: VP/VA Copolymer, PVP
These aren't preservatives - they're what gives gels, pomades, and hairsprays their "hold." They're petroleum-derived plastics that form a film on hair strands, binding them together. That's why gel makes hair feel hard and crunchy. These are incredibly common and you'll find them in many hair and grooming products (not ours).
Beyond scalp irritation and flaking, there's an emerging concern: microplastics. A 2024 study found microplastic particles in the blood of 90% of people tested. They've also been detected in the human heart. Research suggests microplastics can cause oxidative stress and inflammation, and may contribute to cardiovascular issues over time.
When you use a product with PVP or VP/VA Copolymer, you're coating your hair in a plastic film. When that film flakes off, breaks down, or gets inhaled (especially from aerosol hairsprays), those plastic particles have to go somewhere. The long-term implications of daily microplastic exposure are still being studied, but the early research isn't reassuring.
Sulfates
Sodium Lauryl Sulfate (SLS) / Sodium Laureth Sulfate (SLES)
Aggressive surfactants that create lather and strip oil. They're effective cleaners, but they also strip natural oils from the scalp, disrupt the scalp's microbiome, and can trigger compensatory oil overproduction. For clients with thinning hair, sensitive scalps, color-treated hair, or curly/textured hair, sulfates often do more harm than good.
SLES can also be contaminated with 1,4-dioxane.
Silicones
Dimethicone / Cyclomethicone / Amodimethicone
INCI names: Dimethicone, Cyclomethicone, Cyclopentasiloxane, Amodimethicone
Silicones coat the hair shaft to create temporary shine and smoothness. The problem is buildup. Non-water-soluble silicones (especially dimethicone) accumulate over time, blocking moisture from penetrating the hair shaft. This buildup requires harsh sulfate shampoos to remove, creating a cycle of stripping and coating that damages hair over time.
Silicones ending in "-cone" are typically non-water-soluble. Water-soluble silicones (often with "PEG-" prefix) rinse out more easily but come with the PEG contamination concerns.
Drying Alcohols
SD Alcohol / Alcohol Denat / Isopropyl Alcohol
Short-chain alcohols used because they dry quickly. Common in gels, mousses, and hairsprays. They evaporate moisture, leaving hair dry and brittle over time. They can cause scalp irritation.
Not all alcohols are bad. Fatty alcohols like Cetyl Alcohol, Stearyl Alcohol, and Cetearyl Alcohol are actually conditioning agents derived from plant fats. Don't confuse these with the drying alcohols above.
Parabens
Methylparaben / Propylparaben / Butylparaben / Isobutylparaben
Preservatives that are easily absorbed through skin and scalp. Research suggests they may disrupt hormones by mimicking estrogen. The EU has banned certain parabens (isopropylparaben, isobutylparaben); the US still allows all of them.
What Good Ingredients Look Like
Here's what appears on the label of a conventional hair gel versus a botanical styling product. Same function, completely different approach.
Conventional Hair Gel
First 5 ingredients: Water, VP/VA Copolymer, PVP, Carbomer, Propylene Glycol (water plus petroleum-derived plastic film-formers for hold, a synthetic thickener, and a petroleum-derived solvent)
Preservative: DMDM Hydantoin (formaldehyde-releasing preservative)
Fragrance: Fragrance (undisclosed - could contain dozens of synthetic chemicals)
This product relies on petroleum-derived plastics for hold, uses a formaldehyde-releasing preservative, and hides unknown chemicals behind "fragrance."
Botanical Styling Creme (Church California Coastal Creme Pomade)
First 5 ingredients: Aqua (Water), Santalum Album (Sandalwood) Hydrosol, Macrocystis Pyrifera (Seaweed) Extract, Spirulina Platensis (Spirulina), Simmondsia Chinensis (Jojoba) Seed Oil
Preservative: Phenylpropanol, Propanediol, Caprylyl Glycol, Tocopherol (all plant-derived - from corn, coconut, and Vitamin E)
Fragrance: Tanacetum Annuum (Blue Tansy) Oil, Citrus Sinensis (Sweet Orange) Peel Oil, Citrus Reticulata (Red Mandarin) Peel Oil, Cedrus Atlantica (Cedar) Bark Oil, Rosmarinus Officinalis (Rosemary) Leaf Oil, Lavandula Angustifolia (Lavender) Oil, Salvia Officinalis (Sage) Oil
Every ingredient is identifiable and disclosed. The preservatives are botanical antioxidants, not formaldehyde releasers. The scent is a specific blend of essential oils, each listed by name.
Church California's Coastal Creme Pomade is undeniably natural.
Quick Reference
Use this guide as a quick refresher for reviewing ingredient labels.
Red flag patterns:
- Anything ending in "-paraben"
- Anything ending in "-cone"
- Anything starting with "PEG-"
- "Fragrance" or "Parfum" without further disclosure
- DMDM Hydantoin, Quaternium-15, Imidazolidinyl Urea, Diazolidinyl Urea, 2-Bromo-2-Nitropropane-1,3-Diol (Bronopol)
- Petrolatum, Mineral Oil, Paraffinum Liquidum
- VP/VA Copolymer, PVP
- Sodium Lauryl Sulfate, Sodium Laureth Sulfate
Signs of a botanical approach:
- Plant names with Latin binomials: Simmondsia Chinensis (Jojoba), Aloe Barbadensis, etc.
- Hydrosols: Santalum Album Hydrosol, Rosa Damascena Flower Water
- Plant-derived preservatives: Rosmarinus Officinalis Extract, Tocopherol (Vitamin E)
- Specific essential oils listed by name
- Carrier oils: Jojoba Seed Oil, Argan Oil, Coconut Oil
- Plant extracts: Macrocystis Pyrifera (Seaweed), Spirulina, Chamomilla Recutita (Chamomile)
Final tips / Practical application
When evaluating a new product:
- Read the first five ingredients. This is what the product actually is.
- Check if water is present. If so, look at the preservation system.
- Scan for the red flag patterns.
- Look at how fragrance is listed.
- If an ingredient is unfamiliar, look it up. EWG Skin Deep or INCIDecoder are useful resources.