Dr. Althea Gentle Vitamin C Serum Versus Numbuzin No.5 Vitamin Concentrated Serum
Updated on April 08, 2025
Overview
What they are
These products are both reef safe serums. They have a total of 12 ingredients in common
Cool Features
They both contain niacinamide and 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
Dr. Althea Gentle Vitamin C Serum 19 ingredients
Numbuzin No.5 Vitamin Concentrated Serum 47 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Dr. Althea Gentle Vitamin C Serum 19 ingredients
Numbuzin No.5 Vitamin Concentrated Serum 47 ingredients
Key Ingredients
Benefits
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningButylene Glycol
Humectant
Propanediol
SolventNiacinamide
Smoothing
1,2-Hexanediol
Skin ConditioningCaprylic/Capric Triglyceride
MaskingCamellia Sinensis Leaf Water
Masking
Pentylene Glycol
Skin ConditioningAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingTromethamine
BufferingHippophae Rhamnoides Fruit Extract
Skin ConditioningCaprylyl Glycol
EmollientXanthan Gum
Emulsifying3-O-Ethyl Ascorbic Acid
Skin Conditioning
Hydrogenated Poly(C6-20 Olefin)
Abrasive
Adenosine
Skin Conditioning
Disodium EDTA
Allantoin
Skin Conditioning
Hdi/Trimethylol Hexyllactone Crosspolymer
Water, Butylene Glycol, Propanediol, Niacinamide, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Camellia Sinensis Leaf Water, Pentylene Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Hippophae Rhamnoides Fruit Extract, Caprylyl Glycol, Xanthan Gum, 3-O-Ethyl Ascorbic Acid, Hydrogenated Poly(C6-20 Olefin), Adenosine, Disodium EDTA, Allantoin, Hdi/Trimethylol Hexyllactone Crosspolymer
Water
Skin ConditioningButylene Glycol
Humectant
Niacinamide
Smoothing
Panthenol
Skin Conditioning
Tranexamic Acid
Astringent
1,2-Hexanediol
Skin ConditioningNeopentyl Glycol Dicaprate
EmollientCaprylic/Capric Triglyceride
MaskingSorbitol
Humectant
Vaccinium Macrocarpon Fruit Extract
AstringentChondrus Crispus Extract
Skin Conditioning
Butyrospermum Parkii Butter
Skin Conditioning
Saccharum Officinarum Extract
MoisturisingAlpha-Arbutin
Antioxidant
Bifida Ferment Lysate
Skin Conditioning
Sodium Hyaluronate
Humectant
Azadirachta Indica Leaf Extract
Skin ConditioningOcimum Sanctum Leaf Extract
Skin ConditioningMelaleuca Alternifolia Leaf Extract
Perfuming
Curcuma Longa Root Extract
Masking
Charcoal Extract
Skin ConditioningWool Extract
Skin ConditioningPentylene Glycol
Skin ConditioningGlycerin
Humectant
3-O-Ethyl Ascorbic Acid
Skin Conditioning
Bisabolol
Masking
Tromethamine
BufferingEthylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Hydrogenated Lecithin
EmulsifyingAllantoin
Skin Conditioning
Glutathione
Ceramide NP
Skin Conditioning
Beta-Glucan
Skin Conditioning
Dipotassium Glycyrrhizate
Humectant
Tocopherol
Antioxidant
Ascorbic Acid
Antioxidant
Ascorbyl Glucoside
Antioxidant
Tocopheryl Acetate
Antioxidant
Hydroxypropyl Cyclodextrin
MaskingUbiquinone
Antioxidant
Thioctic Acid
Antioxidant
Potassium Hydroxide
BufferingBehenyl Alcohol
Emollient
Carbomer
Emulsion StabilisingXanthan Gum
EmulsifyingDisodium EDTA
Water, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Vaccinium Macrocarpon Fruit Extract, Chondrus Crispus Extract, Butyrospermum Parkii Butter, Saccharum Officinarum Extract, Alpha-Arbutin, Bifida Ferment Lysate, Sodium Hyaluronate, Azadirachta Indica Leaf Extract, Ocimum Sanctum Leaf Extract, Melaleuca Alternifolia Leaf Extract, Curcuma Longa Root Extract, Charcoal Extract, Wool Extract, Pentylene Glycol, Glycerin, 3-O-Ethyl Ascorbic Acid, Bisabolol, Tromethamine, Ethylhexylglycerin, Adenosine, Hydrogenated Lecithin, Allantoin, Glutathione, Ceramide NP, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid, Ascorbyl Glucoside, Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Potassium Hydroxide, Behenyl Alcohol, Carbomer, Xanthan Gum, Disodium EDTA
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 WaterButylene Glycol (or BG) is used within cosmetic products for a few different reasons:
- It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
- It is a humectant, which means that it helps attract moisture into the skin.
- It helps improve product application.
- It has mild preservative properties.
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Niacinamide has emerged as an all-star ingredient due to its many benefits.
It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.
Other benefits include smoothing wrinkles and minimizing redness.
The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.
Learn more about Niacinamide1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
This ingredient is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.
It helps thicken a product's formula and makes it easier to spread by dissolving clumping compounds.
Caprylic Triglyceride is made by combining glycerin with coconut oil, forming a clear liquid.
While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this.
Learn more about Caprylic/Capric TriglyceridePentylene 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 GlycolTromethamine helps balance the pH and improve the texture of a product. It is synthetically created.
As an emulsifier, Tromethamine prevents oil and water ingredients from separating. This helps stabilize the product and elongate a product's shelf life. Tromethamine also makes a product thicker.
Tromethamine helps balance the pH level of a product. Normal pH level of skin is slightly acidic (~4.75-5.5). The acidity of our skin is maintained by our glands and skin biome. 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.
Oral Tromethanmine is an anti-inflammatory drug but plays the role of masking, adding fragrance, and/or balancing pH in skincare.
1,3-Propanediol, 2-amino-2-(hydroxymethyl)-
Learn more about TromethamineXanthan 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 GumYou 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 AcidAdenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.
Studies have found adenosine may also help with wound healing.
In skincare products, Adenosine is usually derived from yeast.
Learn more about AdenosineDisodium EDTA plays a role in making products more stable by aiding other preservatives.
It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.
Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.
Learn more about Disodium EDTAAllantoin plays a role in soothing and moisturizing the skin. Because of this, it is often added to products with strong active ingredients.
Some studies have shown this ingredient can promote wound healing with higher concentrations.
Allantoin is derived from the comfrey plant but produced synthetically for cosmetic products to ensure purity.
Learn more about AllantoinIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Dr. Althea Gentle Vitamin C Serum 19 ingredients
Numbuzin No.5 Vitamin Concentrated Serum 47 ingredients
Reviews
Here's what our community thinks
Dr. Althea Gentle Vitamin C Serum 19 ingredients
I’ve been using this product for the past couple of days and noticed that it’s making my skin break out with a few small closed comedones and pimples on my cheeks and nose. I highly doubt that my skin is purging since this serum contains ethyl ascorbic acid which is a more gentle alternative to L-ascorbic acid and vitamin C isn’t supposed to make the skin purge. I’m assuming the breakouts were Show more
*This is a review for both Vitamin C Serums* This vitamin C serum for sensitive skin is a good product but didn’t have a good experience with the boosting vitamin C serum. Was applying the orange vitamin C serum for just 2-3 days straight and suddenly I started getting acne on my chin, forehead , which I never got acne on those places. Did not feel no irritation while applying the vitamin C , but Show more
Numbuzin No.5 Vitamin Concentrated Serum 47 ingredients
This serum is one of the best all-round anti-oxidant and dark spot serums containing:
- vitamin c
- Glutathion!!
- 5% niacinamide
- Q10
- Alpha Arbutin
(Unfortunately they removed TXA)
Skin type: combi acne prone
This is not just a dark spot serum, its a perfect anti-oxidant serum in the morning. Glutathion is a killer ingredient and the concentration of Vit C is low.
My acne Show more
This is an okay serum for brightening. I have dry, eczema and rosacea skin and didn’t have any issues with breakouts or irritation BUT I didn’t see any big improvement either and used for about 3 months. I found that it left a slightly tacky feeling no matter how long I left between steps in my routine. No smells or fragrances so that was also a plus.
