Dr. Althea Vitamin C Boosting Serum Versus obagi Neo C25 Vitamin C Serum
Updated on October 13, 2025
Overview
What they are
These products are both reef safe serums. They have a total of 10 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, 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
Dr. Althea Vitamin C Boosting Serum 43 ingredients
obagi Neo C25 Vitamin C Serum 26 ingredients
What's inside
What's inside
At a glance
Click on any of the items below to learn more
Dr. Althea Vitamin C Boosting Serum 43 ingredients
obagi Neo C25 Vitamin C Serum 26 ingredients
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Hippophae Rhamnoides Water
Masking
Centella Asiatica Leaf Water
Skin Conditioning
Niacinamide
Smoothing
Butylene Glycol
Humectant
1,2-Hexanediol
Skin Conditioning
Dipropylene Glycol
HumectantWater
Skin ConditioningMethyl Gluceth-20
Humectant
Methylpropanediol
SolventBetaine
Humectant
Tranexamic Acid
Astringent
Glycerin
Humectant
Pentylene Glycol
Skin ConditioningPropanediol
Solvent
Hydroxyethyl Urea
Humectant
Laminaria Japonica Extract
Skin Protecting
Eclipta Prostrata Leaf Extract
Skin ConditioningFicus Carica Fruit Extract
Humectant
Centella Asiatica Extract
Cleansing
Hydrogenated Lecithin
Emulsifying
Sodium Hyaluronate
Humectant
Carbomer
Emulsion Stabilising3-O-Ethyl Ascorbic Acid
Skin Conditioning
C12-14 Pareth-12
EmulsifyingAmmonium Acryloyldimethyltaurate/Vp Copolymer
Xanthan Gum
EmulsifyingTromethamine
BufferingPanthenol
Skin Conditioning
Ethylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Disodium EDTA
Fructooligosaccharides
Humectant
Beta-Glucan
Skin Conditioning
Ascorbic Acid
Antioxidant
Hydrolyzed Hyaluronic Acid
Humectant
Ceramide NP
Skin Conditioning
Alpha-Arbutin
Antioxidant
Tocopherol
Antioxidant
Bifida Ferment Lysate
Skin Conditioning
Bisabolol
Masking
Ubiquinone
Antioxidant
Hydroxydecyl Ubiquinone
Antioxidant
Sodium Acetylated Hyaluronate
Humectant
Hippophae Rhamnoides Water, Centella Asiatica Leaf Water, Niacinamide, Butylene Glycol, 1,2-Hexanediol, Dipropylene Glycol, Water, Methyl Gluceth-20, Methylpropanediol, Betaine, Tranexamic Acid, Glycerin, Pentylene Glycol, Propanediol, Hydroxyethyl Urea, Laminaria Japonica Extract, Eclipta Prostrata Leaf Extract, Ficus Carica Fruit Extract, Centella Asiatica Extract, Hydrogenated Lecithin, Sodium Hyaluronate, Carbomer, 3-O-Ethyl Ascorbic Acid, C12-14 Pareth-12, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Xanthan Gum, Tromethamine, Panthenol, Ethylhexylglycerin, Adenosine, Disodium EDTA, Fructooligosaccharides, Beta-Glucan, Ascorbic Acid, Hydrolyzed Hyaluronic Acid, Ceramide NP, Alpha-Arbutin, Tocopherol, Bifida Ferment Lysate, Bisabolol, Ubiquinone, Hydroxydecyl Ubiquinone, Sodium Acetylated Hyaluronate
Ascorbic Acid
Antioxidant
Water
Skin ConditioningPropanediol
Solvent
Propylene Glycol
Humectant
Alcohol Denat.
Antimicrobial
PEG-8
HumectantBetaine
Humectant
Isopentyldiol
Humectant
Tocopherol
Antioxidant
3-O-Ethyl Ascorbic Acid
Skin Conditioning
Harpagophytum Procumbens Root Extract
Skin ConditioningHydrolyzed Brassica Alba Seed Extract
Skin ConditioningCentella Asiatica Extract
Cleansing
Cynara Scolymus Leaf Extract
Skin ConditioningYeast Extract
Skin Conditioning
Papaver Somniferum Seed Extract
Skin ConditioningSerine
Masking
Citrus Grandis Fruit Extract
Astringent
Methylglucoside Phosphate
Skin ConditioningCI 77400
Cosmetic ColorantGlycerin
Humectant
Pentylene Glycol
Skin ConditioningButylene Glycol
Humectant
PEG/PPG-300/55 Copolymer
CleansingPPG-6-Decyltetradeceth-30
EmulsifyingParfum
Masking
Ascorbic Acid, Water, Propanediol, Propylene Glycol, Alcohol Denat., PEG-8, Betaine, Isopentyldiol, Tocopherol, 3-O-Ethyl Ascorbic Acid, Harpagophytum Procumbens Root Extract, Hydrolyzed Brassica Alba Seed Extract, Centella Asiatica Extract, Cynara Scolymus Leaf Extract, Yeast Extract, Papaver Somniferum Seed Extract, Serine, Citrus Grandis Fruit Extract, Methylglucoside Phosphate, CI 77400, Glycerin, Pentylene Glycol, Butylene Glycol, PEG/PPG-300/55 Copolymer, PPG-6-Decyltetradeceth-30, Parfum
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
You might know this ingredient as Ethyl Ascorbic Acid, a more stable version of ascorbic acid.
Like other types of vitamin C, this ingredient has many benefits including reducing wrinkles, skin soothing, dark spot fading, and fighting against free radicals.
3-O-Ethyl Ascorbic Acid interferes with the process of skin darkening, helping to reduce hyperpigmentation. It also encourages the skin to produce more collagen.
Once applied, 3-O-Ethyl Ascorbic Acid is converted to Vitamin C deeper in the skin's layers. This process is slow but makes this ingredient more tolerable for skin.
The optimum pH range for this ingredient is 4 - 5.5
Learn more about 3-O-Ethyl Ascorbic AcidAscorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.
Not only is vitamin C great for your overall health and immune system, it also has plenty of benefits on your skin.
Vitamin C is best used for brightening skin. It improves dark spots, acne scars, and hyperpigmentation. This is because it blocks the process of skin darkening when exposed to UV.
Remember: Vitamin C should not replace sunscreen!
Your skin uses vitamin C to build collagen. Collagen is one key component in having a strong skin barrier and plump skin. Vitamin C also plays a role in regulating collagen, thus making it effective in improving wrinkles and fine lines.
Ascorbic acid shows potent antioxidant activity. As an antioxidant, it helps fight free-radicals. Free-radicals are molecules that may damage your skin cells. These antioxidants also protect skin against UV damage.
The best formulations include Vitamin E and/or ferulic acid. These two ingredients help stabilize and provide a boost in the benefits of ascorbic acid. This is because ascorbic acid becomes unstable when exposed to UV and air. In fact, you can tell your ascorbic acid has oxidized when it turns an orange-yellow color.
Ascorbic acid is generally compatible with other ingredients. However, using ascorbic acid with other active ingredients might cause irritation. Two ingredients: copper ions and benzoyl peroxide, will inactivate ascorbic acid completely.
Read more about other types of Vitamin C:
Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.
Learn more about Ascorbic AcidBetaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.
This ingredient is best for improving hydration and soothing irritated skin. Studies also show it helps even out skin tone.
Fun fact: Betaine is naturally created in the skin and body. The kind found within cosmetic products can be either plant-derived or synthetic.
Another name for betaine is trimethylglycine.
Learn more about BetaineButylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolCentella Asiatica Extract (Centella) is derived from an herb native to Southeast Asia. It is famous for its anti-inflammatory and soothing properties.
Centella is rich in antioxidants and amino acids, such as Madecassic Acid and Asiaticoside.
Studies show the compounds in centella help with:
The combination of all these properties makes centella effective at soothing, hydrating, and protecting the skin.
Other great components of centella include Vitamin A, vitamin C, several B vitamins, and Asiatic Acid.
Fun fact: Centella has been used as a medicine and in food for many centuries. As a medicine, it is used to treat burns, scratches, and wounds.
Learn more about Centella Asiatica ExtractGlycerin 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 GlycerinPentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can also help thicken or stabilize a product.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
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 PropanediolTocopherol (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 TocopherolWater. 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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Dr. Althea Vitamin C Boosting Serum 43 ingredients
obagi Neo C25 Vitamin C Serum 26 ingredients
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