BondiBoost Thickening Therapy Shampoo Versus K18 Hair PEPTIDE PREP™ pH Maintenance Shampoo

BondiBoost Thickening Therapy Shampoo Versus K18 Hair PEPTIDE PREP™ pH Maintenance Shampoo

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Aloe Barbadensis Leaf Juice

Sodium Methyl Cocoyl Taurate

Cocamidopropyl Betaine

Decyl Glucoside

Coco-Glucoside

Glyceryl Oleate

Propanediol

Hydrolyzed Quinoa

Hydrolyzed Jojoba Esters

Hydrolyzed Adansonia Digitata Seed Extract

Ceramide Ng

Ricinus Communis Seed Oil

Caprylic/Capric Triglyceride

Argania Spinosa Kernel Oil

Olea Europaea Fruit Oil

Arginine

Hydrolyzed Collagen

Rosmarinus Officinalis Leaf Extract

Ascophyllum Nodosum Extract

Amaranthus Caudatus Seed Extract

Equisetum Arvense Leaf Extract

Acanthopanax Senticosus Root Extract

Sodium Hyaluronate

Niacinamide

Biotin

Polyquaternium-7

Polyquaternium-10

Potassium Sorbate

Pentylene Glycol

Caprylyl Glycol

Ethylhexylglycerin

Parfum

Citric Acid

Aloe Barbadensis Leaf Juice, Sodium Methyl Cocoyl Taurate, Cocamidopropyl Betaine, Decyl Glucoside, Coco-Glucoside, Glyceryl Oleate, Propanediol, Hydrolyzed Quinoa, Hydrolyzed Jojoba Esters, Hydrolyzed Adansonia Digitata Seed Extract, Ceramide Ng, Ricinus Communis Seed Oil, Caprylic/Capric Triglyceride, Argania Spinosa Kernel Oil, Olea Europaea Fruit Oil, Arginine, Hydrolyzed Collagen, Rosmarinus Officinalis Leaf Extract, Ascophyllum Nodosum Extract, Amaranthus Caudatus Seed Extract, Equisetum Arvense Leaf Extract, Acanthopanax Senticosus Root Extract, Sodium Hyaluronate, Niacinamide, Biotin, Polyquaternium-7, Polyquaternium-10, Potassium Sorbate, Pentylene Glycol, Caprylyl Glycol, Ethylhexylglycerin, Parfum, Citric Acid

Water

Sodium C14-16 Olefin Sulfonate

Sodium Methyl 2-Sulfolaurate

Sodium Lauryl Sulfoacetate

Sh-Oligopeptide-78

Panthenol

Glycerin

Sodium Phytate

Guar Hydroxypropyltrimonium Chloride

Disodium 2-Sulfolaurate

Caprylhydroxamic Acid

Benzoic Acid

Sodium Hydroxide

Limonene

Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl 2-Sulfolaurate, Sodium Lauryl Sulfoacetate, Sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Disodium 2-Sulfolaurate, Caprylyl Glycol, Caprylhydroxamic Acid, Benzoic Acid, Citric Acid, Sodium Hydroxide, Parfum, Limonene

Alternatives

Ingredients Explained

These ingredients are found in both products.

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

Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.

Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.

Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).

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.

Cocamidopropyl Betaine is a fatty acid created by mixing similar compounds in coconut oil and dimethylaminopropylamine, a compound with two amino groups.

This ingredient is a surfactant and cleanser. It helps gather the dirt, pollutants, and other impurities in your skin to be washed away. It also helps thicken a product and make the texture more creamy.

Being created from coconut oil means Cocamidopropyl Betaine is hydrating for the skin.

While Cocamidopropyl Betaine was believed to be an allergen, a study from 2012 disproved this. It found two compounds in unpure Cocamidopropyl Betaine to be the irritants: aminoamide and 3-dimethylaminopropylamine. High-grade and pure Cocamidopropyl Betaine did not induce allergic reactions during this study.

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.

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