Zotos Professional Quantum Clarifying Shampoo Versus Tressa Remove-All Plus Shampoo
Updated on April 24, 2025
Overview
What they are
These products are both cruelty-free shampoos. They have a total of 8 ingredients in common
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens or silicones
What's Inside
They both contain fragrances and sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Zotos Professional Quantum Clarifying Shampoo 19 ingredients
Tressa Remove-All Plus Shampoo 13 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Zotos Professional Quantum Clarifying Shampoo 19 ingredients
Tressa Remove-All Plus Shampoo 13 ingredients
Key Ingredients
Benefits
Concerns
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium Laureth Sulfate
Cleansing
Sodium Chloride
Masking
Cocamide
EmulsifyingHydrolyzed Vegetable Protein Pg-Propyl Silanetriol
Skin ConditioningPrunus Amygdalus Dulcis Bud Extract
Skin ConditioningTocopheryl Acetate
Antioxidant
Cocamidopropyl Betaine
Cleansing
Tetrasodium EDTA
Citric Acid
Buffering
Polyquaternium-10
Iodopropynyl Butylcarbamate
Preservative
Retinyl Palmitate
Skin Conditioning
Butyl Methoxydibenzoylmethane
UV Absorber
Ethylhexyl Methoxycinnamate
UV Absorber
Glycerin
Humectant
DMDM Hydantoin
Preservative
Parfum
Masking
CI 60730
Cosmetic ColorantWater, Sodium Laureth Sulfate, Sodium Chloride, Cocamide, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Prunus Amygdalus Dulcis Bud Extract, Tocopheryl Acetate, Cocamidopropyl Betaine, Tetrasodium EDTA, Citric Acid, Polyquaternium-10, Iodopropynyl Butylcarbamate, Retinyl Palmitate, Butyl Methoxydibenzoylmethane, Ethylhexyl Methoxycinnamate, Glycerin, DMDM Hydantoin, Parfum, CI 60730
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidCocamidopropyl 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.
Learn more about Cocamidopropyl BetaineDMDM Hydantoin has antimicrobial and antifungal properties. It is a preservative that works by slowly releasing formaldehyde over time.
So what's formaldehyde?
DMDM Hydantoin is approved for use in cosmetics all around the world.
In the EU, this ingredient is allowed in personal products up to 0.6 percent.
You might have heard of the class-action lawsuit about it causing hair loss. According to chemists, there has not been a link found between this ingredient and hair loss.
The Hydantoin part of this ingredient is created by reacting glycolic acid and urea.
You can check out alternatives to Dmdm Hydantoin:
phenoxyethanol, potassium sorbate, and sodium benzoate.
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.
Learn more about ParfumChances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt.
This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.
You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.
There is much debate on whether this ingredient is comedogenic. The short answer - comedogenic ratings don't tell the whole story. Learn more about comegodenic ratings here.
The concensus about this ingredient causing acne seems to be divided. Research is needed to understand if this ingredient does cause acne.
Scrubs may use salt as the primary exfoliating ingredient.
Learn more about Sodium ChlorideSodium Laureth Sulfate (SLES) is a foaming, cleansing, and emulsifying ingredient. It is created from palm kernel oil or coconut oil. SLES is not the same as sodium lauryl sulfate. It is much milder and less likely to irritate.
SLES helps create foam in personal products. It also prevents ingredients from separating, helping to elongate the shelf life.
Sodium Laureth Sulfate is a type of sulfate. It can be drying. We recommend speaking with a professional about using this ingredient if you have concerns.
Learn more about Sodium Laureth SulfateTetrasodium EDTA is the salt formed from neutralizing ethylenediamine tetraacetic acid with sodium hydroxide. It is a chelating agent and used to prevent metal ions from binding to other ingredients. This helps keep the product and ingredients stable.
Tetrasodium EDTA comes as a white solid and is soluble in water.
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. Stay hydrated!
Learn more about WaterIngredient Ratings
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