BioSilk Silk Therapy Shampoo Versus REDKEN All Soft Mega Curls Shampoo
Updated on May 15, 2025
Overview
What they are
These products are both reef safe shampoos. They have a total of 8 ingredients in common
Suited For
They're both likely to be good for dry skin, sensitive skin and scar healing
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain common allergens and fragrances
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
BioSilk Silk Therapy Shampoo 37 ingredients
REDKEN All Soft Mega Curls Shampoo 24 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
BioSilk Silk Therapy Shampoo 37 ingredients
REDKEN All Soft Mega Curls Shampoo 24 ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium C14-16 Olefin Sulfonate
Cleansing
Cocamidopropyl Betaine
Cleansing
Glycine
Buffering
Acrylates Copolymer
Passiflora Edulis Seed Oil
Emollient
Hydrolyzed Silk
Humectant
Hydrolyzed Quinoa
Skin ConditioningPanthenol
Skin Conditioning
Disodium Laureth Sulfosuccinate
CleansingGuar Hydroxypropyltrimonium Chloride
Skin ConditioningSodium Cocoyl Isethionate
CleansingSodium Lauroamphoacetate
CleansingSodium Methyl Cocoyl Taurate
Cleansing
Dimethicone
Emollient
Polyquaternium-74
Skin ConditioningLaureth-7
EmulsifyingXylitylglucoside
Humectant
Anhydroxylitol
Humectant
Xylitol
Humectant
Symphytum Officinale Leaf Extract
Skin ConditioningAnthemis Nobilis Flower Extract
Masking
Mentha Piperita Leaf Extract
Skin ConditioningLavandula Angustifolia Extract
Skin Conditioning
Salvia Sclarea Extract
AntiseborrhoeicGlycol Distearate
Emollient
Steareth-4
EmulsifyingPEG-150 Pentaerythrityl Tetrastearate
Emulsifying
PEG-6 Caprylic/Capric Glycerides
EmulsifyingPhenoxyethanol
Preservative
Methylisothiazolinone
Preservative
Parfum
Masking
Butylphenyl Methylpropional
Perfuming
Limonene
Perfuming
Linalool
Perfuming
Hexyl Cinnamal
Perfuming
Citric Acid
Buffering
Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Glycine, Acrylates Copolymer, Passiflora Edulis Seed Oil, Hydrolyzed Silk, Hydrolyzed Quinoa, Panthenol, Disodium Laureth Sulfosuccinate, Guar Hydroxypropyltrimonium Chloride, Sodium Cocoyl Isethionate, Sodium Lauroamphoacetate, Sodium Methyl Cocoyl Taurate, Dimethicone, Polyquaternium-74, Laureth-7, Xylitylglucoside, Anhydroxylitol, Xylitol, Symphytum Officinale Leaf Extract, Anthemis Nobilis Flower Extract, Mentha Piperita Leaf Extract, Lavandula Angustifolia Extract, Salvia Sclarea Extract, Glycol Distearate, Steareth-4, PEG-150 Pentaerythrityl Tetrastearate, PEG-6 Caprylic/Capric Glycerides, Phenoxyethanol, Methylisothiazolinone, Parfum, Butylphenyl Methylpropional, Limonene, Linalool, Hexyl Cinnamal, Citric Acid
Water
Skin ConditioningSodium C14-16 Olefin Sulfonate
Cleansing
Cocamidopropyl Betaine
Cleansing
Laureth-5 Carboxylic Acid
CleansingSodium Chloride
Masking
Glycerin
Humectant
Caprylyl/Capryl Glucoside
CleansingParfum
Masking
Sodium Hydroxide
BufferingCitric Acid
Buffering
Hexylene Glycol
EmulsifyingSodium Benzoate
Masking
PEG-55 Propylene Glycol Oleate
Propylene Glycol
Humectant
Aloe Barbadensis Leaf Juice Powder
Skin Conditioning
Salicylic Acid
Masking
Polyquaternium-67
Benzoic Acid
Masking
Benzyl Alcohol
Perfuming
Coumarin
Perfuming
Linalool
Perfuming
Benzyl Benzoate
Antimicrobial
Hexyl Cinnamal
Perfuming
Limonene
Perfuming
Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Laureth-5 Carboxylic Acid, Sodium Chloride, Glycerin, Caprylyl/Capryl Glucoside, Parfum, Sodium Hydroxide, Citric Acid, Hexylene Glycol, Sodium Benzoate, PEG-55 Propylene Glycol Oleate, Propylene Glycol, Aloe Barbadensis Leaf Juice Powder, Salicylic Acid, Polyquaternium-67, Benzoic Acid, Benzyl Alcohol, Coumarin, Linalool, Benzyl Benzoate, Hexyl Cinnamal, Limonene
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 BetaineHexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil.
This ingredient is a known EU allergen and may sensitize the skin. The EU requires this ingredient to be listed separately on an ingredients list.
Hexyl Cinnamal is not water soluble but is soluble in oils.
Learn more about Hexyl CinnamalLimonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
The term '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.
Learn more about LimoneneLinalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
Like Limonene, this ingredient oxidizes when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.
This ingredient has a scent that is floral, spicy tropical, and citrus-like.
Learn more about LinaloolParfum 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 ParfumSodium C14-16 Olefin Sulfonate is a cleansing agent made from a mixture of long chain sulfonate salts. It can also help produce foam.
This ingredient may be drying. We recommend speaking with a professional if you have concerns.
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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