Dr. Sensitive Collagen + Vitamin C Serum Versus iWhite Korea Glow Booster Vitamin C Serum

Dr. Sensitive Collagen + Vitamin C Serum Versus iWhite Korea Glow Booster Vitamin C Serum

This brightening serum is formulated around Ascorbic Acid and Niacinamide to brighten dull-looking skin and soften the look of wrinkles.

This brightening serum is formulated around Hippophae Rhamnoides Fruit Extract and Niacinamide to brighten dull-looking skin and fade the look of dark spots.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycerin

Glycereth-26

Propylene Glycol

Hydrolyzed Collagen

Ascorbic Acid

Niacinamide

Glyceryl Polymethacrylate

Sodium Ethylparaben

Pvm/Ma Copolymer

Polyacrylate Crosspolymer-6

Panthenol

Caprylhydroxamic Acid

Phenoxyethanol

Ethylhexylglycerin

Methylparaben

PEG-40 Hydrogenated Castor Oil

Parfum

Water, Glycerin, Glycereth-26, Propylene Glycol, Hydrolyzed Collagen, Ascorbic Acid, Niacinamide, Glyceryl Polymethacrylate, Sodium Ethylparaben, Pvm/Ma Copolymer, Polyacrylate Crosspolymer-6, Panthenol, Caprylhydroxamic Acid, Phenoxyethanol, Ethylhexylglycerin, Methylparaben, PEG-40 Hydrogenated Castor Oil, Parfum

Hippophae Rhamnoides Fruit Extract

Methylpropanediol

Caprylic/Capric Triglyceride

Cyclopentasiloxane

Betaine

Citrus Limon Fruit Extract

Punica Granatum Fruit Extract

Salix Alba Bark Extract

Malpighia Emarginata Fruit Extract

Terminalia Ferdinandiana Fruit Extract

Portulaca Oleracea Extract

Citrus Paradisi Fruit Extract

Sodium Hyaluronate

Xylitol

Allantoin

Ascorbyl Glucoside

Tetrahexyldecyl Ascorbate

Sodium Riboflavin Phosphate

Sodium Ascorbyl Phosphate

Magnesium Ascorbyl Phosphate

Menadione

Glutathione

Zea Mays Starch

Mannitol

Sucrose

Adenosine

Butylene Glycol

Caprylyl Glycol

Isohexadecane

Cyclohexasiloxane

Dimethicone

Cetearyl Glucoside

Sorbitan Olivate

Cetearyl Alcohol

Sorbitan Oleate

Polysorbate 80

Xanthan Gum

Microcrystalline Cellulose

Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Glyceryl Acrylate/Acrylic Acid Copolymer

Ammonium Acryloyldimethyltaurate/Vp Copolymer

Sodium Polyacrylate

Dimethicone/Vinyl Dimethicone Crosspolymer

1,2-Hexanediol

Benzyl Glycol

Raspberry Ketone

Disodium EDTA

CI 77891

CI 77492

Citrus Limon Peel Oil

Citral

Limonene

Water, Hippophae Rhamnoides Fruit Extract, Glycerin, Methylpropanediol, Caprylic/Capric Triglyceride, Cyclopentasiloxane, Niacinamide, Betaine, Citrus Limon Fruit Extract, Punica Granatum Fruit Extract, Salix Alba Bark Extract, Malpighia Emarginata Fruit Extract, Terminalia Ferdinandiana Fruit Extract, Portulaca Oleracea Extract, Citrus Paradisi Fruit Extract, Sodium Hyaluronate, Panthenol, Xylitol, Allantoin, Ascorbic Acid, Ascorbyl Glucoside, Tetrahexyldecyl Ascorbate, Sodium Riboflavin Phosphate, Sodium Ascorbyl Phosphate, Magnesium Ascorbyl Phosphate, Menadione, Glutathione, Zea Mays Starch, Mannitol, Sucrose, Adenosine, Butylene Glycol, Caprylyl Glycol, Isohexadecane, Cyclohexasiloxane, Dimethicone, Cetearyl Glucoside, Sorbitan Olivate, Cetearyl Alcohol, Sorbitan Oleate, Polysorbate 80, Xanthan Gum, Microcrystalline Cellulose, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Glyceryl Acrylate/Acrylic Acid Copolymer, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Sodium Polyacrylate, Dimethicone/Vinyl Dimethicone Crosspolymer, 1,2-Hexanediol, Benzyl Glycol, Ethylhexylglycerin, Raspberry Ketone, Disodium EDTA, CI 77891, CI 77492, Citrus Limon Peel Oil, Citral, Limonene

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Ascorbic Acid is is pure Vitamin C and is the biologically active form used directly by skin.

Not only is vitamin C great for your overall health and immune system, but it also has plenty of benefits for your skin. It is best supported by academic literature for:

Topical vitamin C has been shown to help neutralize oxidative stress from UV and pollution, helping to improve photoaging and hyperpigmentation when used consistently.

One clinical study found that using 5% topical vitamin C for six months improved signs of photodamaged skin, both on the surface and in the deeper structural layers of the skin.

While vitamin C doesn’t replace sunscreen, studies show it can boost photoprotection when combined with Vitamin E and ferulic acid. These two ingredients help improve stability and protective effects.

The big downside of this ingredient is formulation difficulty. Vitamin C is prone to oxidation and doesn't penetrate the skin unless formulated correctly. Research found that vitamin C absorbs into the skin best at a low pH (< 3.5) with about 20% being the upper limit for effective absorption.

Skin levels can saturate after repeated application; this means your skin won’t keep absorbing more once it’s full of vitamin C. This is why more isn’t always better with vitamin C and why very high concentrations don’t necessarily give extra benefits.

Ascorbic acid generally works well with many skincare ingredients but can be irritating when combined with other active ingredients. Strong oxidizing acne treatments like benzoyl peroxide can reduce the effectiveness of vitamin C if they are used at the same time; they are often recommended for use at different times of day.

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.

Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:

The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.

Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging.

And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin.

You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this.

In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it.

If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare.

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.

When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes.

In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution).

Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger looking skin.

Another name for vitamin B3 is nicotinamide. This vitamin is water-soluble and our bodies don't store it. We obtain Vitamin B3 from either food or skincare. Meat, fish, wheat, yeast, and leafy greens contain vitamin B3.

The type of niacinamide used in skincare is synthetically created.

Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.

There are two forms of panthenol: D and L.

D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.

Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):

Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.

This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

This ingredient is also referred to as pro-vitamin B5.

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. Remember to stay hydrated!

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