Obagi Vitamin C + Arbutin Brightening Serum Versus Paula's Choice C25 Super Booster

Obagi Vitamin C + Arbutin Brightening Serum Versus Paula's Choice C25 Super Booster

This brightening serum is formulated around Ascorbic Acid and Arbutin to fade the look of dark spots and brighten dull-looking skin.

This brightening treatment is formulated around Ascorbic Acid to fade the look of dark spots and brighten dull-looking skin.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Propylene Glycol

Alcohol Denat.

Dipropylene Glycol

Ascorbic Acid

Arbutin

Propylene Carbonate

Sodium Lauryl Sulfate

Hydroxyacetophenone

Water, Propylene Glycol, Alcohol Denat., Dipropylene Glycol, Ascorbic Acid, Arbutin, Propylene Carbonate, Sodium Lauryl Sulfate, Hydroxyacetophenone

Cyclopentasiloxane

Ethylhexyl Hydroxystearate

Polysilicone-11

Dimethicone

Polymethylsilsesquioxane

Disteardimonium Hectorite

Cyclopentasiloxane, Ascorbic Acid, Ethylhexyl Hydroxystearate, Polysilicone-11, Dimethicone, Polymethylsilsesquioxane, Disteardimonium Hectorite, Propylene Carbonate

Alternatives

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.

This ingredient is a solvent. It helps dissolve active ingredients and alter the texture of products.

Propylene Carbonate is commonly used in makeup and with clay, such as montmorillonite or bentonite.

Studies show this ingredient to be safe for cosmetics. When it is undiluted, it can cause skin irritation. (It is always diluted in skincare and makeup). This ingredient is water-soluble.

Propylene Carbonate is created from propylene glycol and carbonic acid.

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