Versus

For Skin’s Sake (FSS) Vitamin C Serum Versus Dr. Althea Gentle Vitamin C Serum

Serum
Serum
Indonesian Brand Indonesia
Korean Brand South Korea

Updated on January 30, 2025

Overview

What they are

These products are both fungal acne (malassezia) safe and reef safe serums. They have a total of 6 ingredients in common

Cool Features

They both contain Vitamin C

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 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

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

Key Ingredients

Benefits

Ingredients Side-by-side

found in both products

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
Skin Conditioning

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 Acid
Humectant, Masking, Skin Conditioning

Butylene 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.

Skin Conditioning, Skin Protecting, Soothing

Allantoin 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 Allantoin
Skin Conditioning, Solvent

Pentylene 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 Glycol

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken and improve the texture of products. Due to its properties, it can prevent water and oil ingredients from separating.

When to use

6 Routines
83% use in am
17% use in pm
100% use every day
363 Routines
77% use in am
23% use in pm
89% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

For Skin’s Sake (FSS) Vitamin C Serum 22 ingredients

5.0 /5
from 2 ratings
Absorbs Well (2) Great Value (2) Works Well (2)
dyahpalupi's avatar

Dyah Palupi

1 month ago
Review

serum yg cukup works di kulitku yg sering banget kusam. aku pakai sekitar sebulanan dan hasilnya cukup ok ya untuk mencerahkan. kalo utk memudarkan dark spot aku rasa belum ada perubahan yg signifikan. nggak bikin kulitku makin kering. teksturnya lumayan cair jd cepet meresapnya, cuman memang baunya cukup asem gitu ya, tapi setelah di apply dan meresap hilang & gak berbau lagi kok. repurchase ? Show more

#great value
#absorbs well
#strong scent
#works well
hennylimdr's avatar

Henny Henny

17 days ago
Review

The most perfect vitamin C serum I've ever tried, concentration aside. Serum Vitamin C yang sekali coba pakai, enggak bisa ditinggal lagi. Pernah coba ganti serum vitamin C lain, flek-flek langsung bermunculan dan menebal. Begitu balik lagi pakai produk ini, flek yang baru-baru muncul itu langsung menipis. Ada serum vitamin C lain lagi yang juga oke tapi teksturnya sangat lengket; sedangkan serum Show more

#great value
#light
#absorbs well
#light scent

Dr. Althea Gentle Vitamin C Serum 19 ingredients

3.5 /5
from 10 ratings
Absorbs Well (7) No Scent (5) Light (5)
skincarewithmilan's avatar

Milan

9 months ago
Review

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

#broke me out
#light
#absorbs well
#no scent
dajannamata's avatar

Dajanna Mata

8 months ago
Review

*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

#expensive
#broke me out
#light
#no scent