FaceTheory Hyaluret Serum S13 Versus FaceTheory Regenacalm 2% Retinol and Vitamin C Serum S1
Updated on August 07, 2025
Overview
What they are
These products are both vegan, cruelty-free, and reef safe serums. They have a total of 8 ingredients in common
Cool Features
They both contain Vitamin C
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates
What's Inside
They both contain 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
FaceTheory Hyaluret Serum S13 16 ingredients
FaceTheory Regenacalm 2% Retinol and Vitamin C Serum S1 23 ingredients
What's inside
What's inside
At a glance
Click on any of the items below to learn more
FaceTheory Hyaluret Serum S13 16 ingredients
FaceTheory Regenacalm 2% Retinol and Vitamin C Serum S1 23 ingredients
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningPropanediol
Solvent
Niacinamide
Smoothing
Sodium Ascorbyl Phosphate
Antioxidant
Lactic Acid
Buffering
Anethum Graveolens Herb Extract
Perfuming
Glycyrrhiza Glabra Root Extract
Bleaching
Sodium Levulinate
Skin ConditioningSodium Benzoate
Masking
Gellan Gum
Sodium Oleoyl Hyaluronate
Skin ConditioningMagnesium Carboxymethyl Beta-Glucan
Skin ConditioningSodium Carboxymethyl Beta-Glucan
CleansingCalcium PCA
Humectant
Citric Acid
Buffering
Potassium Sorbate
Preservative
Water, Propanediol, Niacinamide, Sodium Ascorbyl Phosphate, Lactic Acid, Anethum Graveolens Herb Extract, Glycyrrhiza Glabra Root Extract, Sodium Levulinate, Sodium Benzoate, Gellan Gum, Sodium Oleoyl Hyaluronate, Magnesium Carboxymethyl Beta-Glucan, Sodium Carboxymethyl Beta-Glucan, Calcium PCA, Citric Acid, Potassium Sorbate
Water
Skin ConditioningPropanediol
Solvent
Glycerin
Humectant
Polyglyceryl-4 Oleate
Emulsifying
Retinyl Palmitate
Skin Conditioning
Sodium Ascorbyl Phosphate
Antioxidant
Polyglyceryl-6 Stearate
Emollient
Tocopherol
Antioxidant
Sodium Anisate
AntimicrobialSodium Levulinate
Skin ConditioningGlyceryl Caprylate
EmollientAnethum Graveolens Herb Extract
Perfuming
Glycyrrhiza Glabra Callus Culture Extract
Skin ConditioningCetyl Hydroxyethylcellulose
Emulsion StabilisingLactic Acid
Buffering
Polyglyceryl-6 Behenate
Emulsion Stabilising
Ferulic Acid
Antimicrobial
Xanthan Gum
EmulsifyingSalicylic Acid
Masking
Sodium Hyaluronate
Humectant
Aloe Barbadensis Leaf Juice
Skin Conditioning
Citric Acid
Buffering
Potassium Sorbate
Preservative
Water, Propanediol, Glycerin, Polyglyceryl-4 Oleate, Retinyl Palmitate, Sodium Ascorbyl Phosphate, Polyglyceryl-6 Stearate, Tocopherol, Sodium Anisate, Sodium Levulinate, Glyceryl Caprylate, Anethum Graveolens Herb Extract, Glycyrrhiza Glabra Callus Culture Extract, Cetyl Hydroxyethylcellulose, Lactic Acid, Polyglyceryl-6 Behenate, Ferulic Acid, Xanthan Gum, Salicylic Acid, Sodium Hyaluronate, Aloe Barbadensis Leaf Juice, Citric Acid, Potassium Sorbate
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Anethum Graveolens Herb Extract is a fragrance.
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.
Read more about some other popular AHA's here:
Learn more about Citric AcidLactic Acid is another well-loved alpha hydroxy acid (AHA). It is gentler than glycolic acid but still highly effective.
Its main role is to exfoliate the surface of the skin by loosening the “glue” that holds dead skin cells together. Shedding those old cells leads to smoother, softer, and more even-toned skin.
Because lactic acid molecules are larger than glycolic acid, they don’t penetrate as deeply. This means they’re less likely to sting or irritate, making it a great choice for beginners or those with sensitive skin.
Like glycolic acid, it can:
Lactic acid also acts as a humectant (like hyaluronic acid). It can draw water into the skin to improve hydration and also plays a role in the skin's natural moisturizing factor (NMF) in the form of sodium lactate.
Studies show it can boost ceramide production to strengthen the skin barrier and even help balance the skin’s microbiome.
To get results, choose products with a pH between 3-4.
Lower strengths (5-12%) focus on surface exfoliation; higher strengths (12% and up) can reach deeper in the dermis (deeper, supportive layer) to improve skin texture and firmness over time.
Though it was originally derived from milk, most modern lactic acid used in skincare is vegan. It is made through non-dairy fermentation to create a bio-identical and stable form suitable for all formulations.
Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.
Lactic acid is truly a gentle multitasker: it exfoliates, hydrates, strengthens, and brightens. It's a great ingredient for giving your skin a smooth, glowing, and healthy look without the harshness of stronger acids.
Read more about some other popular AHA's here:
Learn more about Lactic AcidPotassium 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 SorbatePropanediol 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 PropanediolSodium Ascorbyl Phosphate is a form of Vitamin C. It is the salt of ascorbic acid.
This ingredient is more gentle than ascorbic acid. It is also more stable when exposed to light and oxygen.
Vitamin C helps reduce redness, improve skin texture, reduce the effects of aging, reduce the visibility of dark spots, and brighten skin.
Your skin uses Vitamin C to produce collagen and collagen production plays a role in having a strong skin barrier and plump skin. As an antioxidant, this ingredient also helps reduce the signs of aging such as fine-lines and wrinkles.
VItamin C helps brighten skin by blocking the process of skin darkening.
In a 2011 study, Sodium Ascorbyl Phosphate was found to have antibacterial properties. This may help treat acne.
Read more about other types of Vitamin C:
Learn more about Sodium Ascorbyl PhosphateSodium levulinate is the a sodium salt of Levulinic Acid. If dissolved in an aqueous solution, the two ingredients become identical.
It is a skin conditioning agent, meaning it helps soften and hydrate your skin.
According to Cosmetic Ingredient Review, the highest amounts of sodium levulinate are found in mouthwashes at 0.62%.
Learn more about Sodium LevulinateWater. 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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