Necessaire Rosemary Shampoo Multi-Protein Versus BrioGeo Destined For Density Peptide Shampoo for Thicker, Fuller Hair

Necessaire Rosemary Shampoo Multi-Protein Versus BrioGeo Destined For Density Peptide Shampoo for Thicker, Fuller Hair

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Sodium Lauroyl Methyl Isethionate

Cocamidopropyl Betaine

Glycerin

Propanediol

Sodium Methyl Oleoyl Taurate

Sodium Methyl Cocoyl Taurate

Glyceryl Stearate

Sodium Cocoyl Isethionate

Rosmarinus Officinalis Leaf Extract

Rosmarinus Officinalis Leaf Oil

Rosmarinus Officinalis Leaf Water

Hydrolyzed Jojoba Protein

Hydrolyzed Rice Protein

Hydrolyzed Pea Protein

Hydrolyzed Quinoa

Hydrolyzed Vegetable Protein

Ceramide Ag

Ceramide AP

Ceramide EOP

Ceramide Ng

Ceramide NP

Tocopherol

Linoleic Acid

Linolenic Acid

Acetyl Tetrapeptide-3

Acrylates Crosspolymer-4

Butylene Glycol

Cholesterol

Trifolium Pratense Flower Extract

Calcium Gluconate

Citric Acid

Dextran

Niacinamide

Panthenol

Guar Hydroxypropyltrimonium Chloride

Sucrose Distearate

Trisodium Ethylenediamine Disuccinate

Dipropylene Glycol

Gluconolactone

Hydrogenated Lecithin

Parfum

Phenoxyethanol

Potassium Sorbate

Sodium Benzoate

Sodium Carbonate

Sodium Chloride

Sodium Hydroxide

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Benzyl Alcohol

Limonene

Linalool

Water, Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Betaine, Glycerin, Propanediol, Sodium Methyl Oleoyl Taurate, Sodium Methyl Cocoyl Taurate, Glyceryl Stearate, Sodium Cocoyl Isethionate, Rosmarinus Officinalis Leaf Extract, Rosmarinus Officinalis Leaf Oil, Rosmarinus Officinalis Leaf Water, Hydrolyzed Jojoba Protein, Hydrolyzed Rice Protein, Hydrolyzed Pea Protein, Hydrolyzed Quinoa, Hydrolyzed Vegetable Protein, Ceramide Ag, Ceramide AP, Ceramide EOP, Ceramide Ng, Ceramide NP, Tocopherol, Linoleic Acid, Linolenic Acid, Acetyl Tetrapeptide-3, Acrylates Crosspolymer-4, Butylene Glycol, Cholesterol, Trifolium Pratense Flower Extract, Calcium Gluconate, Citric Acid, Dextran, Niacinamide, Panthenol, Guar Hydroxypropyltrimonium Chloride, Sucrose Distearate, Trisodium Ethylenediamine Disuccinate, Dipropylene Glycol, Gluconolactone, Hydrogenated Lecithin, Parfum, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Sodium Carbonate, Sodium Chloride, Sodium Hydroxide, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Benzyl Alcohol, Limonene, Linalool

Lauramidopropyl Betaine

Sodium C14-16 Olefin Sulfonate

Cocamidopropyl Hydroxysultaine

Coffea Arabica Seed Oil

Copper Tripeptide-34

Panax Ginseng Root Extract

Biotin

Coconut Acid

Leuconostoc/Radish Root Ferment Filtrate

Sodium Isethionate

Aloe Barbadensis Leaf Juice

Caffeine

Lindera Strychnifolia Root Extract

Tocopheryl Acetate

Ubiquinone

Glycine

Larix Europaea Wood Extract

Sodium Metabisulfite

Camellia Sinensis Leaf Extract

Zinc Chloride

Caprylhydroxamic Acid

Water, Sodium Cocoyl Isethionate, Lauramidopropyl Betaine, Glycerin, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Hydroxysultaine, Coffea Arabica Seed Oil, Copper Tripeptide-34, Panax Ginseng Root Extract, Biotin, Coconut Acid, Leuconostoc/Radish Root Ferment Filtrate, Sodium Methyl Cocoyl Taurate, Sodium Isethionate, Citric Acid, Aloe Barbadensis Leaf Juice, Caffeine, Propanediol, Lindera Strychnifolia Root Extract, Tocopheryl Acetate, Ubiquinone, Glycine, Larix Europaea Wood Extract, Sodium Metabisulfite, Camellia Sinensis Leaf Extract, Zinc Chloride, Sodium Hydroxide, Parfum, Caprylhydroxamic Acid, Benzyl Alcohol

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Benzyl Alcohol is an aromatic alcohol with several roles: it's a preservative, solvent, and mild fragrance component with a floral scent.

This ingredient has been deemed safe for use in cosmetic formulations at concentrations up to 5%, and up to 10% in hair dyes. You'll typically see 0.5-2% in most rinse-off or leave-on products.

As a preservative, it works by disrupting the membrane of microbial proteins. This helps keep bacteria and fungi from growing in your products.

The sensitization picture is actually quite assuring as well:of nearly 71,000 patients patch tested with benzyl alcohol, only 0.21% showed a positive reaction with most of them being weakly positive.

This led researchers to conclude that benzyl alcohol cannot be regarded as a significant contact allergen.

It is worth noting this ingredient is classified as one of the EU's regulated fragrance allergens and restricted to 1% in finished products.

Labels must also declare it in concentrations above 0.001% in leave-on products and 0.01% in rinse-off products.

At concentrations around 5%, localized redness and itching can appear as a direct irritant response and not as a true allergic reaction.

Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.

Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.

However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.

Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.

In skincare formulas, citric acid can:

While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.

Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.

Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.

However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.

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.

Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.

Also called "fragrance", this ingredient can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "parfum" in the ingredients list is a different mixture.

For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations.

The term 'parfum' or 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.

For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance by INCI standards.

One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.

Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.

Parfum can also be used to mask or cover an unpleasant scent.

The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.

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.

Sodium cocoyl isethionate is a natural ingredient from coconut oil. It is an ultra gentle cleanser that gives a nice foam without drying the skin or impacting the skin barrier.

The amount of foam created depends on the amount of sodium cocoyl isethionate used in the product.

This ingredient also helps improve the spreadability of a product.

This ingredient hasn’t been shown in studies to feed fungal acne yeast.

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.

Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.

"Alkaline" refers to a high pH level. A low pH level would be considered acidic.

Sodium Methyl Cocoyl Taurate is a gentle, coconut-derived cleansing surfactant. It's most commonly found in "sulfate-free" cleansers.

As a taurate, it belongs to a class of anionic surfactants prized for being efficient at cleansing without harshness, good performance in hard water, stability across a wide pH range, and easily biodegradable.

It is able to lift away oil and grime and make a nice lather without stripping your skin, so it's a good pick for sensitive skin.

Safety-wise, it has a good record. The CIR Expert Panel has concluded this ingredient to be safe in cosmetics and concentrations go up to 11% in leave-on products or 13% in rinse-off products.

Despite being derived from coconut oil, this ingredient is fungal acne safe. It's a water-soluble surfactant with no fatty oils or esters left intact on skin for the Malassezia yeast to feed.

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!

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