Dr. Dennis Gross SkincareserumTreat step

Dr. Dennis Gross Skincare Vitamin C Lactic 15% Firm & Bright Serum

This serum combines the brightening power of Vitamin C with the exfoliating benefits of Lactic Acid to address multiple concerns like dark spots, uneven texture, and loss of firmness. It's designed for those looking for a comprehensive anti-aging treatment.

Sephora price

$87.00

Price matters most when you are trying to learn whether this lane belongs in your routine without turning the test into a luxury gamble.

Sephora reviews

3.5 / 5

About 424 reviews on the current Sephora source, so there is real volume behind the reputation.

Shoppers keep mentioning

Lactic AcidVeganGood for: Uneven TextureGood for: Loss of firmnessGood for: Dark spotsVitamin C15% L-Ascorbic Acid: Visibly diminishes signs of sun aging.Lactic Acid: Increases absorption and enhances antioxidant performance.Licorice: Reduces the look of hyperpigmentation.Dark SpotsFine Lines and Wrinklesand Loss of Firmness and Elasticity

These are the shopper themes that keep showing up around this listing and shape why people open it in the first place.

Glass take

3.5 / 5 overall fit

A potent blend of Vitamin C and Lactic Acid that targets multiple signs of aging, but may be too intense for sensitive skin.

Dr. Dennis Gross Skincare Vitamin C Lactic 15% Firm & Bright Serum

Sephora snapshot refreshed April 23, 2026

Price, rating, review count, and source status come from Sephora. Glass adds the routine fit, overlap risk, and what to compare next.

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What Sephora says

What this product is supposed to do

An antioxidant-rich serum that visibly improves signs of sun aging, dark spots, uneven tone, fine lines, wrinkles, and dullness.

NormalDryCombinationand OilyDark SpotsFine Lines and Wrinklesand Loss of Firmness and Elasticity

Once daily, apply four to six drops as an all-over treatment on clean, dry skin.

May cause a slight tingling sensation until skin is acclimated.

For optimal results, apply after your Dr. Dennis Gross Skincare® peel (sold separately).

What Glass adds

What actually matters before you buy it

This serum is a strong choice for those targeting hyperpigmentation and loss of firmness, especially if you're already accustomed to exfoliating acids. The combination of Vitamin C and Lactic Acid is effective, but be mindful of potential irritation if your skin is sensitive or not used to these ingredients.

Brightening and Firming Effects

Many users praise the serum for its ability to visibly brighten the complexion and improve skin's firmness over time. The combination of Vitamin C and Lactic Acid is noted as particularly effective for these concerns.

Potential for Irritation

A significant number of reviews mention a tingling or stinging sensation, especially upon initial use. This suggests the potent formula may be too intense for sensitive skin types or those not accustomed to high concentrations of Vitamin C and AHAs.

Best for

When this is a smart buy

Dull skin
Uneven skin tone
Loss of firmness
Hyperpigmentation
Those familiar with Vitamin C and AHAs

Skip if

When this is the wrong lane

Your skin is very sensitive or easily irritated
You are new to Vitamin C or exfoliating acids
You have an active breakout or compromised skin barrier

Routine Fit

How to Integrate This Serum

Apply this serum to clean, dry skin once daily. It's designed to be used before moisturizer. For best results, especially if you use Dr. Dennis Gross's peels, apply this serum after your peel treatment. Be aware of the potential for tingling and allow your skin to acclimate.

Why it works

Where it earns the slot and where it does not

The useful question is not whether this product is good in a vacuum. It is whether it makes your routine easier to run or just adds one more bottle with a familiar ingredient on it.

What it actually does well

Addresses multiple signs of aging
Potent combination of Vitamin C and Lactic Acid
Can improve brightness and firmness
Lightweight texture

Where it starts to feel redundant

Potential for irritation
Higher price point
May not be suitable for beginners

Routine fit

Where it belongs in the stack

Morning or Night

This serum can be used in either your morning or evening routine. If using in the morning, it can provide antioxidant protection throughout the day. If using at night, it can work alongside your skin's natural repair processes. Avoid using multiple strong actives on the same night until you know how your skin tolerates this product.

Glass rating

How this formula scores in real life

3.5/ 5 overall

A potent blend of Vitamin C and Lactic Acid that targets multiple signs of aging, but may be too intense for sensitive skin.

Texture

4.0 / 5

The serum has a lightweight texture that absorbs quickly, leaving skin feeling smooth.

Efficacy

3.5 / 5

Users report visible improvements in dark spots and firmness, but some experienced irritation.

Full ingredient breakdown

Every ingredient, what it does, and whether I care

Solvent

Water/Aqua/Eau

Badness

0.0 / 10

The base liquid for the serum.

Usually helps with

Hydration

Watch for

None

Solvent

Dipropylene Glycol

Badness

1.0 / 10

A humectant and solvent that helps other ingredients penetrate the skin.

Usually helps with

Hydration

Watch for

Can be a mild irritant for some

Active

Ascorbic Acid

Badness

2.0 / 10

The pure form of Vitamin C, known for its antioxidant and brightening properties. It can be unstable and may cause irritation in high concentrations.

Usually helps with

Brightening, antioxidant protection, collagen support

Watch for

Potential for stinging or irritation, especially for sensitive skin. Stability issues if exposed to air and light.

Solvent

Dimethyl Isosorbide

Badness

1.0 / 10

A solvent that can help improve the solubility and penetration of other ingredients, including Vitamin C.

Usually helps with

Enhanced ingredient delivery

Watch for

Generally well-tolerated

Emulsifier

Ricinoleth-40

Badness

1.0 / 10

An emulsifier that helps to blend oil and water-based ingredients.

Usually helps with

Formulation stability

Watch for

Generally considered safe

pH Adjuster

Aminomethyl Propanol

Badness

2.0 / 10

Used to adjust the pH of the formula. Can be a mild irritant for some.

Usually helps with

Formula stability

Watch for

Potential for mild irritation

Active

Lactic Acid

Badness

3.0 / 10

An Alpha Hydroxy Acid (AHA) that exfoliates the skin, improves texture, and can help with hyperpigmentation. It can be more hydrating than other AHAs but may still cause irritation.

Usually helps with

Exfoliation, texture improvement, brightening

Watch for

Potential for stinging, redness, and increased sun sensitivity. Start slowly.

Antioxidant

Tocopherol

Badness

1.0 / 10

Vitamin E, works synergistically with Vitamin C to provide antioxidant protection and help stabilize Vitamin C.

Usually helps with

Antioxidant protection, skin conditioning

Watch for

Rarely causes allergic reactions

Soothing Agent

Glycyrrhiza Glabra (Licorice) Root Extract

Badness

1.0 / 10

Known for its anti-inflammatory and skin-brightening properties, helping to reduce redness and hyperpigmentation.

Usually helps with

Soothing, brightening, reducing hyperpigmentation

Watch for

Generally well-tolerated

Antioxidant

Ferulic Acid

Badness

2.0 / 10

A potent antioxidant that enhances the stability and efficacy of Vitamin C and provides additional photoprotection.

Usually helps with

Antioxidant protection, Vitamin C stabilization

Watch for

Generally well-tolerated

Skin Brightener

Morus Alba Fruit Extract

Badness

1.0 / 10

Also known as Mulberry extract, it can help to inhibit melanin production, reducing the appearance of dark spots.

Usually helps with

Brightening, reducing hyperpigmentation

Watch for

Generally well-tolerated

Humectant

Sodium Hyaluronate

Badness

0.0 / 10

A form of hyaluronic acid that attracts and holds moisture, helping to hydrate the skin.

Usually helps with

Hydration

Watch for

None

Active

Glycolic Acid

Badness

3.0 / 10

Another Alpha Hydroxy Acid (AHA) that exfoliates the skin, promoting cell turnover and improving skin texture and tone. Can be more potent than lactic acid.

Usually helps with

Exfoliation, brightening, texture improvement

Watch for

Potential for stinging, redness, and increased sun sensitivity. Use with caution if using other AHAs.

Skin Conditioning

Adenosine

Badness

1.0 / 10

A skin-conditioning agent that can help improve the appearance of wrinkles and fine lines.

Usually helps with

Anti-aging, skin smoothing

Watch for

Generally well-tolerated

Humectant

Glycerin

Badness

0.0 / 10

A common and effective humectant that draws moisture to the skin.

Usually helps with

Hydration

Watch for

None

Preservative

Phenoxyethanol

Badness

2.0 / 10

A common preservative used to prevent microbial growth in cosmetic products. Can be a mild irritant for some.

Usually helps with

Product preservation

Watch for

Potential for skin irritation or allergic reactions in sensitive individuals

Compare before you buy

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FAQ

The fast answers people actually need

Is this serum suitable for sensitive skin?

This serum contains potent actives like 15% Vitamin C and Lactic Acid, which can cause tingling or irritation. It may not be suitable for very sensitive skin or those new to these ingredients. It's recommended to patch test or start with less frequent application.

Can I use this serum with other exfoliating products?

It's generally not recommended to use this serum with other strong exfoliants (like other AHAs or BHAs) on the same night, especially when you're first starting out, to avoid over-exfoliation and irritation. However, the brand suggests using it after their peels, so individual tolerance may vary.

What are the main benefits of this serum?

The main benefits include visibly improving signs of sun aging, reducing the appearance of dark spots and uneven tone, diminishing fine lines and wrinkles, and improving skin's firmness and elasticity.

See If This Is Compatible With My Skin