Obagi Professional-C Serum 20%

Obagi Professional-C Serum 20%

Efficacy91/100IrritancyHigh

Works for

Anti-aging
Ascorbic acid, Ascorbyl glucoside
Works well
What the product description says
“Improve the appearance of fine lines and wrinkles.”
Source: Bluemercury

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains ascorbic acid.

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: ascorbyl glucoside.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

Ascorbic acidHeroEffect: HighThe most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of aging~3.2–4.8%
Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~1.8–2.8%
Evens skin tone
Ascorbic acid, Ascorbyl glucoside
Works well
What the product description says
“Combat dull, uneven skin tone and texture.”
Source: Bluemercury

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: ascorbic acid.

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually can help even out the skin tone: ascorbyl glucoside.

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

Ascorbic acidHeroEffect: HighThe most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of aging~3.2–4.8%
Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~1.8–2.8%
Moisturizing
Sodium hyaluronate, Propylene glycol + 1 more
Works
What the product description says
“This potent daily antioxidant serum, fortified with 20% pure L-ascorbic acid, supports the skin barrier's defenses against free radicals and environmental stressors that can cause the skin to appear dry, dull and lackluster, and discolored.”
Source: Bluemercury

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": sodium hyaluronate, propylene glycol.

When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).

Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~1.1–1.7%
Propylene glycol· HumectantEffect: LowHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating~4.7–7.1%
Sorbitol· HumectantEffect: LowHelps attract water to the upper layer of the skin and improves the product texture~1–1.5%
Anti-oxidation
Side benefit · Ascorbic acid, Ascorbyl glucoside
Works well

This product contains antioxidants (ascorbic acid) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).

The following ingredients - ascorbyl glucoside also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

Ascorbic acidHeroEffect: HighThe most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of aging~3.2–4.8%
Ascorbyl glucosideKey activeEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~1.8–2.8%

Can it cause trouble?

Irritancy
9 strong irritants: Ascorbic acid, Alcohol denat. + 7 more — patch-test recommended
High risk
We flagged 14 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Ascorbic acidThe most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of agingHigh~23–34%est.
Propylene glycolHelps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritatingHigh~4.7–7.1%est.
Alcohol denat.Produces temporary toning effect. Can help dissolve other ingredients or preserve productsHigh~2.4–3.6%est.
Citrus aurantium dulcis peel extractUsed as a fragranceHigh~0.9–1.3%est.
Citrus paradisi fruit extract—High~0.8–1.2%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.5–1.2%est.
Benzyl benzoateFragrance with sweet balsamic smell. Help to preserve products and dissolve other ingredients. Could trigger allergic reactions and be irritatingHigh~0.15–0.65%est.
Amyl cinnamal—High~0.15–0.5%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.1–0.35%est.
Hexyl cinnamalA fragrance with jasmine smell. A likely irritantHigh~0.1–0.35%est.
Ascorbyl glucosideA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in productsMedium~1.8–2.8%est.
EthoxydiglycolHelps to improve the product consistencyMedium~1.5–2.3%est.
Caprylyl/capryl glucosideHelps oil and water mix together. Can be used as a cleansing agentMedium~0.55–1.3%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.2–0.75%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

User reviews

Would you recommend?
No community reviews yet.

Be the first — your take helps the next person decide.

Ingredients

Filter by role to see what each ingredient is doing.

Ascorbic acid~23–34%
Hero · Anti-aging, Anti-oxidation, Evens skin toneIrritant · high
Irritation risk
High
Works for
Evens skin toneAnti-agingAnti-oxidation

The most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of aging

More about Ascorbic acid
Propylene glycol~4.7–7.1%
Irritant · high
Irritation risk
High
Works for
Moisturizing

Helps oil and water mix together and can enhance the penetration of other ingredients into the skin. It can be irritating

More about Propylene glycol
Water~4.2–6.3%
Formula
Irritation risk
Low

Plain old water

More about Water
Ascorbic acid~3.2–4.8%
Hero · Anti-aging, Anti-oxidation, Evens skin toneIrritant · high
Irritation risk
High
Works for
Anti-oxidationEvens skin toneAnti-aging

The most well-researched antioxidant that works in skin. Helps neutralize free radicals supporting collagen production, helping to even out the skin tone and preventing early signs of aging

More about Ascorbic acid
Alcohol denat.~2.4–3.6%
Irritant · high
Irritation risk
High

Produces temporary toning effect. Can help dissolve other ingredients or preserve products

More about Alcohol denat.
Ascorbyl glucoside~1.8–2.8%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-oxidationAnti-aging

A vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products

More about Ascorbyl glucoside
Ethoxydiglycol~1.5–2.3%
Irritant · medium
Irritation risk
Medium

Helps to improve the product consistency

More about Ethoxydiglycol
Phenoxyethanol~0.5–1%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Sodium hyaluronate~1.1–1.7%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin

More about Sodium hyaluronate
Sorbitol~1–1.5%
Formula
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin and improves the product texture

More about Sorbitol
Citrus aurantium dulcis peel extract~0.9–1.3%
Irritant · high
Irritation risk
High

Used as a fragrance

More about Citrus aurantium dulcis peel extract
Citrus paradisi fruit extract~0.8–1.2%
Irritant · high
Parfum~0.5–1.2%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Caprylyl/capryl glucoside~0.55–1.3%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together. Can be used as a cleansing agent

More about Caprylyl/capryl glucoside
Calcium hydroxide~0.4–1%
Formula
Zinc chloride~0.3–0.7%
Formula
Irritation risk
Low
More about Zinc chloride
Citric acid~0.2–0.75%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Benzyl benzoate~0.15–0.65%
Irritant · high
Irritation risk
High

Fragrance with sweet balsamic smell. Help to preserve products and dissolve other ingredients. Could trigger allergic reactions and be irritating

More about Benzyl benzoate
Amyl cinnamal~0.15–0.5%
Irritant · high
Irritation risk
High
More about Amyl cinnamal
Limonene~0.1–0.35%
Irritant · high
Irritation risk
High

A common frangrance that can easily irritate skin, especially if exposed to air, light or heat

More about Limonene
Hexyl cinnamal~0.1–0.35%
Irritant · high
Irritation risk
High

A fragrance with jasmine smell. A likely irritant

More about Hexyl cinnamal
Ingredient list view

Ascorbic acid, Propylene glycol, Water, Ascorbic acid, Alcohol denat., Ascorbyl glucoside, Ethoxydiglycol, Phenoxyethanol, Sodium hyaluronate, Sorbitol, Citrus aurantium dulcis peel extract, Citrus paradisi fruit extract, Parfum, Caprylyl/capryl glucoside, Calcium hydroxide, Zinc chloride, Citric acid, Benzyl benzoate, Amyl cinnamal, Limonene, Hexyl cinnamal

Compare prices

Retailers ranked by price — lowest first.

Amazon USPrice as of 11/9 06:17 GMT
$130.00
Buy
Bluemercury
$155.00
Buy
Amazon USPrice as of 11/9 03:12 GMT
$155.00
Buy

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
ObagiProfessional-C Serum 20%YOUR PRODUCTEveline CosmeticsC Perfection - Anti-wrinkle SerumLa Roche-PosayPure Vitamin C12 SerumEczema Honey CoEczema Honey 15% Vitamin C + Ferulic Acid Serum
Match—96%94%94%
Price$155.00$14.04−$140.96$41.77−$113.23$23.95−$131.05
Shared key ingredients—3 of 32 of 32 of 3
Key difference—Ascorbyl TetraisopalmitateAcetyl Dipeptide-1 Cetyl EsterFerulic Acid
Irritancy High High Medium Low
Drying alcohol Contains drying alcohol — Contains drying alcohol —
View product Shop Shop Shop

More alternatives: NourishMax VITAMIN C + B + E + FERULIC & RETINOL SERUMSeoul Ceuticals Day Glow Serum

Cheaper alternatives? See how this stacks up against similar formulas.
We compare ingredient profiles across our catalog — pick the closest match for your budget.
Open dupe finder

Product summary

"Obagi - Professional-C Serum 20%" is effective for: Anti-aging and Evens skin tone

This product could be helpful for: Moisturizing, but its actives are not the most effective or are not well-studied.

Ingredient callouts

  • This product also contains Vitamin C (Ascorbic Acid) 5.40% - 8.00% It can be helpful in stimulating collagen production, neutralizing free radicals in skin and improving pigmentation marks. We recommend to use up this product quickly after opening: Ascorbic Acid degrades fast when it gets in contact with air and light. The moment the product turns orange, it is a sign that a significant share of the vitamin C in it is no longer effective.
  • Humectants (sodium hyaluronate 0.40% - 0.90%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Price

The product retails from 115.00$ up to 142.00$ in the United States and from 103.00£ up to 128.00£ in the United Kingdom.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 7 studies and safety reviews.

  1. 1
  2. 2
    Propylene Glycolpubmed.ncbi.nlm.nih.gov
  3. 3
  4. 4
  5. 5
  6. 6

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.