Updated on February 04, 2025
Overview
What they are
These products are both vegan, cruelty-free, and reef safe serums. They have a total of 11 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, dark spots and better texture
Free From
They both do not contain any common allergens, parabens, silicones or 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
Theramid C-Tetra E.F. 21 ingredients
reviv serums Ultimate Serum 80 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
Theramid C-Tetra E.F. 21 ingredients
reviv serums Ultimate Serum 80 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAscorbyl Tetraisopalmitate
Antioxidant
Propanediol
Solvent
Ascorbyl Glucoside
Antioxidant
Glycerin
Humectant
Tricaprylin
Masking
Methylpropanediol
SolventGlycine Soja Seed Extract
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Ascorbyl Methylsilanol Pectinate
Antioxidant
Ferulic Acid
Antimicrobial
Lecithin
Emollient
Sclerotium Gum
Emulsion StabilisingPullulan
Xanthan Gum
EmulsifyingSilica
Abrasive
Sodium Hydroxide
BufferingSodium Citrate
BufferingCitric Acid
Buffering
Sodium Benzoate
Masking
Potassium Sorbate
Preservative
Water, Ascorbyl Tetraisopalmitate, Propanediol, Ascorbyl Glucoside, Glycerin, Tricaprylin, Methylpropanediol, Glycine Soja Seed Extract, Tocopheryl Acetate, Ascorbyl Methylsilanol Pectinate, Ferulic Acid, Lecithin, Sclerotium Gum, Pullulan, Xanthan Gum, Silica, Sodium Hydroxide, Sodium Citrate, Citric Acid, Sodium Benzoate, Potassium Sorbate
Water
Skin ConditioningPentylene Glycol
Skin ConditioningHamamelis Virginiana Extract
Antiseborrhoeic
Glycerin
Humectant
Dimethyl Sulfone
Solvent
Human Umbilical Mesenchymal Stem Cell Exosomes
Skin ConditioningAlpha-Arbutin
Antioxidant
Palmitoyl Tripeptide-5
Skin Conditioning
Ergothioneine
Antioxidant
Dipalmitoyl Hydroxyproline
Skin Conditioning
Ubiquinone
Antioxidant
Saccharomyces Ferment Lysate Filtrate
Skin ConditioningTetrahexyldecyl Ascorbate
Antioxidant
Sh-Oligopeptide-1
Skin Conditioning
Rh-Polypeptide-3
Skin Conditioning
Sh-Polypeptide-9
Skin Conditioning
Sh-Polypeptide-1
Skin Conditioning
Sh-Polypeptide-11
Human Urine Derived Stem Cell Conditioned Media
EmollientGlycereth-7 Triacetate
EmollientEthoxydiglycol
HumectantLactococcus Ferment Lysate
Skin ConditioningChlorella Vulgaris Extract
Skin Conditioning
Saccharide Isomerate
Humectant
Tripeptide-2
Skin Conditioning
Dimer Tripeptide-43
Vitis Vinifera Flower Cell Extract
MaskingPyrus Malus Fruit Extract
Skin Conditioning
Hydroxyacetophenone
Antioxidant
Tocopheryl Acetate
Antioxidant
Propanediol
Solvent
Xanthan Gum
EmulsifyingLecithin
Emollient
Pullulan
Butylene Glycol
Humectant
Sodium Citrate
BufferingPolysorbate 20
Emulsifying
Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate
Skin ConditioningPalmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine
Skin Conditioning
Palmitoyl Tripeptide-1
Skin Conditioning
Palmitoyl Tetrapeptide-7
Skin Conditioning
Acetyl Hexapeptide-51 Amide
Skin Conditioning
Nannochloropsis Oculata Extract
HumectantCentella Asiatica Extract
Cleansing
Chondrus Crispus Extract
Skin Conditioning
Equisetum Arvense Extract
AstringentGeranium Maculatum Extract
TonicTaraxacum Officinale Root Extract
Skin ConditioningAchillea Millefolium Flower Extract
Antioxidant
Curcuma Longa Rhizome Extract
Skin ConditioningSpirulina Platensis Extract
Skin ProtectingAloe Barbadensis Leaf Juice
Skin Conditioning
Cassia Angustifolia Seed Polysaccharide
Skin ConditioningSimmondsia Chinensis Seed Oil
Emollient
Arginine
Masking
Aspartic Acid
Masking
Glycine
Buffering
Alanine
MaskingSerine
Masking
Valine
MaskingIsoleucine
Skin ConditioningProline
Skin ConditioningThreonine
Histidine
Humectant
Phenylalanine
Masking
PCA
Humectant
Sodium PCA
Humectant
Sodium Lactate
BufferingSodium Chloride
Masking
Carbomer
Emulsion StabilisingAlcohol
Antimicrobial
Hydroxyethylcellulose
Emulsion StabilisingAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingSodium Hydroxide
BufferingPotassium Sorbate
Preservative
Sodium Benzoate
Masking
Dextran
Disodium EDTA
Phenoxyethanol
Preservative
Ethylhexylglycerin
Skin ConditioningWater, Pentylene Glycol, Hamamelis Virginiana Extract, Glycerin, Dimethyl Sulfone, Human Umbilical Mesenchymal Stem Cell Exosomes, Alpha-Arbutin, Palmitoyl Tripeptide-5, Ergothioneine, Dipalmitoyl Hydroxyproline, Ubiquinone, Saccharomyces Ferment Lysate Filtrate, Tetrahexyldecyl Ascorbate, Sh-Oligopeptide-1, Rh-Polypeptide-3, Sh-Polypeptide-9, Sh-Polypeptide-1, Sh-Polypeptide-11, Human Urine Derived Stem Cell Conditioned Media, Glycereth-7 Triacetate, Ethoxydiglycol, Lactococcus Ferment Lysate, Chlorella Vulgaris Extract, Saccharide Isomerate, Tripeptide-2, Dimer Tripeptide-43, Vitis Vinifera Flower Cell Extract, Pyrus Malus Fruit Extract, Hydroxyacetophenone, Tocopheryl Acetate, Propanediol, Xanthan Gum, Lecithin, Pullulan, Butylene Glycol, Sodium Citrate, Polysorbate 20, Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate, Palmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Acetyl Hexapeptide-51 Amide, Nannochloropsis Oculata Extract, Centella Asiatica Extract, Chondrus Crispus Extract, Equisetum Arvense Extract, Geranium Maculatum Extract, Taraxacum Officinale Root Extract, Achillea Millefolium Flower Extract, Curcuma Longa Rhizome Extract, Spirulina Platensis Extract, Aloe Barbadensis Leaf Juice, Cassia Angustifolia Seed Polysaccharide, Simmondsia Chinensis Seed Oil, Arginine, Aspartic Acid, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, PCA, Sodium PCA, Sodium Lactate, Sodium Chloride, Carbomer, Alcohol, Hydroxyethylcellulose, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Hydroxide, Potassium Sorbate, Sodium Benzoate, Dextran, Disodium EDTA, Phenoxyethanol, Ethylhexylglycerin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 WaterPropanediol 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 PropanediolGlycerin 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 GlycerinTocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.
One study found using Tocopheryl Acetate with Vitamin C decreased the number of sunburned cells.
Tocopheryl Acetate is commonly found in both skincare and dietary supplements.
Learn more about Tocopheryl AcetateLecithin is a term for a group of substances found in the cell membranes of plants, animals, and humans. They are made up of mixture of phospholipids.
This ingredient has emollient and emulsifying properties.
As an emollient, lecithen helps soften the skin and creates a barrier to keep moisture in.
As an emulsifier, it also helps prevent water and oil ingredients from separating. Lecithin can also help ingredients be better absorbed by the skin.
This is because the phospholipids in lecithin produce liposomes. Liposomes help other ingredients get through the skin barrier.
Depending on the source of this ingredient, lecithin may not be fungal acne safe. This is because some sources of lecithin come from soybean oil, which may feed the malassezia yeast that feeds fungal acne.
We recommend reaching out to the brand you are purchasing from to inquire about the source of their lecithin.
Learn more about LecithinPullulan is a low viscosity polysaccharide (a long chain carbohydrate) with binding and film forming properties when dissolved in water. It is used to create a "silicone-like" or silky feel in cosmetics without adding viscosity.
According to a manufacturer, this ingredient's ability to easily dissolves makes it a great carrier for active ingredients.
Due to it being edible and tasteless, you'll likely find this ingredient in breath freshener strips. This ingredient is produced from the starch of the fungus, Aureobasidium pullulans.
Pullulan is stable over a broad-range of pH.
Learn more about PullulanXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumSodium 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.
Learn more about Sodium HydroxideSodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.
Its main functions are to maintain the pH of a product and neutralize metal ions.
The acidity of our skin is maintained by our glands and skin biome; normal pH level of skin is slightly acidic (~4.75-5.5).
Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.
Learn more about Sodium CitrateSodium 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 BenzoatePotassium 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 SorbateIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Theramid C-Tetra E.F. 21 ingredients
reviv serums Ultimate Serum 80 ingredients
Reviews
Here's what our community thinks
Theramid C-Tetra E.F. 21 ingredients
feels really nice and absorbs well but didn't see any differences in my skin after going through 3 bottles
