Versus

Kirkland Signature Moisture Shampoo Versus Bumble and bumble. Seaweed Shampoo

Shampoo
Shampoo
American Brand United States
American Brand United States

Updated on January 18, 2024

Overview

What they are

These products are both vegan and reef safe shampoos. They have a total of 17 ingredients in common

Cool Features

They both contain Vitamin C and Vitamin E

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, reducing pores, scar healing and better texture

Free From

They both do not contain any common allergens or parabens

What's Inside

They both contain harsh alcohols, fragrances and oils

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

Click any item below to learn more and see relevant ingredients

About this product

About this product

At a glance

Click on any of the items below to learn more

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Signature Moisture Shampoo

Water

Skin Conditioning

Sodium Cocoyl Isethionate

Cleansing

Cocamidopropyl Hydroxysultaine

Cleansing

Potassium Cocoyl Glycinate

Disodium Cocoyl Glutamate

Cleansing

Sodium Lauroyl Methyl Isethionate

Cleansing

Sodium Lauroyl Sarcosinate

Cleansing

Decyl Glucoside

Cleansing

Potassium Cocoate

Emulsifying
Can worsen Dry Skin Icon

Glycereth-26

Humectant
0 / 0

Glycol Distearate

Emollient
Not safe for Fungal Acne Icon

Cocamidopropylamine Oxide

Cleansing

Phenoxyethanol

Preservative
Preservative Icon

Parfum

Masking
Fragrance IconMay worsen Eczema IconMay worsen Rosacea Icon

Sodium Cocoyl Glutamate

Cleansing

PEG-120 Methyl Glucose Dioleate

Emulsifying
0 / 0 Not safe for Fungal Acne Icon

Methyl Gluceth-20

Humectant

Quaternium-91

Amodimethicone

Silicon Icon

Acrylates Copolymer

Citric Acid

Buffering
AHA IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconHelps brighten skin IconMay worsen Rosacea Icon

Dicaprylyl Ether

Emollient

Polyquaternium-10

Guar Hydroxypropyltrimonium Chloride

Skin Conditioning

Chlorphenesin

Antimicrobial
Preservative Icon

Trisodium Ethylenediamine Disuccinate

PPG-3 Benzyl Ether Myristate

Emollient

Glyceryl Oleate

Emollient
Fragrance IconNot safe for Fungal Acne Icon

C11-15 Pareth-7

Emulsifying

Polyquaternium-39

Laureth-9

Emulsifying

Phospholipids

Skin Conditioning

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol

Skin Conditioning

Polyquaternium-55

Sodium Benzoate

Masking
Preservative Icon

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation Icon

Trideceth-12

Emulsifying

Glycine Soja Oil

Emollient
3 / 0 Oil IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Acetic Acid

Buffering

Tetrasodium EDTA

May worsen Eczema Icon

Benzoic Acid

Masking
Preservative IconMay worsen Eczema Icon

Sodium Hydroxide

Buffering

Disodium EDTA

Potassium Sorbate

Preservative
Preservative Icon

Hydrolyzed Pea Protein Pg-Propyl Silanetriol

Skin Conditioning

Caprylyl Glycol

Emollient

Tocopheryl Acetate

Antioxidant
0 / 0 Vitamin E IconAntioxidant Icon

Helianthus Annuus Seed Oil

Emollient
0 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Alcohol

Antimicrobial
Alcohol IconCan worsen Dry Skin IconMay worsen Oily Skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing Icon

Argania Spinosa Kernel Oil

Emollient
Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Ascorbic Acid

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon

Persea Gratissima Oil

Skin Conditioning
0-3 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Copaifera Officinalis Resin

Masking

Passiflora Edulis Seed Oil

Emollient
Oil IconNot safe for Fungal Acne Icon

Isomalt

Humectant

Euterpe Oleracea Fruit Oil

Skin Conditioning
Oil IconNot safe for Fungal Acne Icon

Aloe Barbadensis Leaf Extract

Emollient
Helps reduce Skin Redness IconHelps reduce irritation Icon

Cucumis Sativus Fruit Extract

Emollient

Lycium Barbarum Fruit Extract

Astringent

Punica Granatum Extract

Astringent

Malus Domestica Fruit Cell Culture Extract

Skin Conditioning

Quaternium-95

UV Absorber

Propanediol

Solvent

Camellia Sinensis Leaf Extract

Antimicrobial
Antioxidant IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging Icon

Persea Gratissima Fruit Extract

Emollient

Xanthan Gum

Emulsifying

Lecithin

Emollient

Vitis Vinifera Fruit Cell Extract

Skin Conditioning

Vitis Vinifera Seed Extract

Antimicrobial
Antioxidant Icon

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Antioxidant
Antioxidant Icon

Water, Sodium Cocoyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Sodium Lauroyl Methyl Isethionate, Sodium Lauroyl Sarcosinate, Decyl Glucoside, Potassium Cocoate, Glycereth-26, Glycol Distearate, Cocamidopropylamine Oxide, Phenoxyethanol, Parfum, Sodium Cocoyl Glutamate, PEG-120 Methyl Glucose Dioleate, Methyl Gluceth-20, Quaternium-91, Amodimethicone, Acrylates Copolymer, Citric Acid, Dicaprylyl Ether, Polyquaternium-10, Guar Hydroxypropyltrimonium Chloride, Chlorphenesin, Trisodium Ethylenediamine Disuccinate, PPG-3 Benzyl Ether Myristate, Glyceryl Oleate, C11-15 Pareth-7, Polyquaternium-39, Laureth-9, Phospholipids, Glycerin, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Polyquaternium-55, Sodium Benzoate, Panthenol, Trideceth-12, Glycine Soja Oil, Acetic Acid, Tetrasodium EDTA, Benzoic Acid, Sodium Hydroxide, Disodium EDTA, Potassium Sorbate, Hydrolyzed Pea Protein Pg-Propyl Silanetriol, Caprylyl Glycol, Tocopheryl Acetate, Helianthus Annuus Seed Oil, Alcohol, Tocopherol, Argania Spinosa Kernel Oil, Ascorbic Acid, Persea Gratissima Oil, Copaifera Officinalis Resin, Passiflora Edulis Seed Oil, Isomalt, Euterpe Oleracea Fruit Oil, Aloe Barbadensis Leaf Extract, Cucumis Sativus Fruit Extract, Lycium Barbarum Fruit Extract, Punica Granatum Extract, Malus Domestica Fruit Cell Culture Extract, Quaternium-95, Propanediol, Camellia Sinensis Leaf Extract, Persea Gratissima Fruit Extract, Xanthan Gum, Lecithin, Vitis Vinifera Fruit Cell Extract, Vitis Vinifera Seed Extract, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Seaweed Shampoo

Ingredients Explained

These ingredients are found in both products.

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

Skin Conditioning, Solvent

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 Water

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.

Learn more about Sodium Cocoyl Isethionate
Cleansing, Skin Conditioning

Cocamidopropyl Hydroxysultaine is a synthetic cleansing agent, though it is derived from coconut oil.

It is used to enhance the texture of products by boosting lather and thickening the texture. As a cleanser, Cocamidopropyl Hydroxysultaine is mild.

Preservative

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

Masking, Perfuming

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 Parfum
Buffering, Masking

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 Acid

This ingredient is derived from guar gum.

It is a conditioning ingredient, meaning it helps soften skin and hair.

Antimicrobial, Preservative

Chlorphenesin is a synthetic preservative. It helps protect a product against bacteria in order to extend shelf life. In most cases, Chlorphenesin is paired with other preservatives such as phenoxyethanol and caprylyl glycol.

Chlorphenesin is a biocide. This means it is able to help fight the microorganisms on our skin. It is also able to fight odor-releasing bacteria.

Chlorphenesin is soluble in both water and glycerin.

Studies show Chlorphenesin is easily absorbed by our skin. You should speak with a skincare professional if you have concerns about using Chlorphenesin.

Learn more about Chlorphenesin
Humectant, Skin Conditioning, Skin Protecting

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
Masking, Preservative

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

Learn more about Sodium Benzoate
Skin Conditioning

Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.

There are two forms of panthenol: D and L.

D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.

Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):

Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.

This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

This ingredient is also referred to as pro-vitamin B5.

Learn more about Panthenol
Preservative

Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.

This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.

Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.

You'll often find this ingredient used with other preservatives.

Learn more about Potassium Sorbate
Emollient, Humectant, Skin Conditioning

Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.

It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.

Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.

This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.

Learn more about Caprylyl Glycol
Emollient, Masking, Skin Conditioning

Helianthus Annuus Seed Oil is the oil derived from the seeds of a Sunflower. Sunflower seed oil is non-fragrant. It is an emollient, meaning it helps to soften the skin.

Sunflower seed oil contains many fatty acids. The fatty acids found in sunflower seeds include (from highest amount to least): linoleic acid, myristic acid, palmitic acid, stearic acid, arachidic acid, oleic acid, and linolenic acid.

These fatty acids help the skin create ceramides. Ceramides play a role in repairing the skin barrier.

Helianthus Annuus Seed Oil helps moisturize the skin. This in turn helps the skin look more rejuvenated and smoother.

Sunflowers are rich in vitamin E.

Historians believe Indigenous cultures of North America domesticated sunflowers before corn. Thus they relied on sunflower oil for a variety of uses. One such use is moisturizing skin and hair.

Sunflower seed oil may not be fungal acne safe. We recommend speaking with a professional if you have any concerns.

Learn more about Helianthus Annuus Seed Oil
Antimicrobial, Astringent, Masking

Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is usually an astringent alcohol.

These alcohols are drying on the skin. They may strip away your skin's natural oils and even damage your skin barrier. Astringent alcohols may also irritate skin.

Other types of astringent alcohols include:

According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.

Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.

Fatty alcohols come from plant oils such as coconut oil. These can help hydrate the skin and are non-irritating. Some fatty alcohols include cetyl and stearyl alcohol.

Learn more about Alcohol
Antioxidant, Masking, Skin Conditioning

Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.

Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.

Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.

You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.

There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.

Learn more about Tocopherol
Solvent

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.

Learn more about Propanediol

When to use

8 Routines
38% use in am
63% use in pm
50% use every day
1 Routine
0% use in am
100% use in pm
100% use every on_rotation

Reviews

Here's what our community thinks

Kirkland Signature Moisture Shampoo 72 ingredients

5.0 /5
from 2 ratings
Cleansing (1) Soft (1) Volume (1)
mandac's avatar

Mandy C 🌸

9 months ago
Review

Good and cheap! Recommend a double-wash of the scalp/roots only (suds will automatically wash the mids and ends of the hair). Do not condition the roots after (only the mids and ends). This will make it so you only have to wash your hair every 3 days or longer

MileyScanlon's avatar

Miley Scanlon

22 days ago
Review

I looooooooove this shampoo!! Ive had a lot with UVA/UVB protection, but not enough to not make my hair puff out like a volleyball. This never lets my hair puff out. And it totally makes it sooo soft! I will never give up on this shampoo!!!!

#cleansing
#soft
#volume
#waves

Bumble and bumble. Seaweed Shampoo 38 ingredients

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