Dr. Brenner Vitamin C Serum 20% L‑Ascorbic Acid 1oz — Ferulic Acid & Hyaluronic for Brighter, Hydrated Skin

Dr. Brenner Vitamin C Serum is a concentrated 20% L-ascorbic acid facial serum formulated with ferulic acid, vitamin E and hyaluronic acid to brighten skin tone and improve texture.

This lightweight liquid blends a high percentage of pure L-ascorbic acid with stabilizing antioxidants and moisture-binding hyaluronic acid. It’s made in small batches to preserve potency and aims to support a more even-looking complexion, reduce dullness, and hydrate surface layers. The formula may naturally vary in color from clear to slightly yellow without indicating reduced effectiveness—always check the expiration date printed on the back label.

How will this serum affect my skin’s brightness and texture?

The concentrated L-ascorbic acid targets uneven tone and surface dullness while ferulic acid and vitamin E help stabilize and complement antioxidant activity. Users often report a visibly brighter appearance and smoother-feeling skin with regular use. Results depend on consistent application and overall skincare routine.

• 20% pure L-ascorbic acid for direct antioxidant support
• Ferulic acid and vitamin E enhance stability and performance
• Hyaluronic acid adds immediate surface hydration for smoother texture
• Small-batch manufacturing to maximize active freshness

Is this suitable for sensitive or acne-prone skin?

The high-strength vitamin C can cause temporary tingling or sensitivity for those new to concentrated acids; a patch test is recommended. People with acne-prone skin may find the formula helpful for improving the look of marks and uneven tone, but introduce gradually and monitor your skin’s response. If irritation persists, reduce frequency or stop and consult a skincare professional.

• Patch test on the inner forearm before face use
• Start every other day, then increase as tolerated
• Avoid combining immediately with other strong actives without guidance
• Discontinue if prolonged irritation occurs

How do I use the serum for best results in morning or evening routines?

Apply a few drops to cleansed, dry skin and follow with moisturizer and sunscreen in the morning. At night, use after cleansing and before richer creams or oils to lock in hydration. Consistent daily use yields the most noticeable changes over several weeks.

• Use 2–3 drops for face and neck; gently pat into skin
• Layer moisturizer over the serum to seal hydration
• Always use broad-spectrum SPF in daytime when using antioxidants
• Store away from direct heat and sunlight to preserve potency

What does "made fresh" mean for this product?

Dr. Brenner produces this serum in small batches every two weeks to ensure the active ingredients remain effective at delivery. Because L-ascorbic acid can oxidize over time, frequent production reduces the chance of degraded product reaching customers. Check the expiration date printed on the bottle for assurance of freshness.

• Manufactured in short runs to maintain ingredient potency
• Expiration date printed on the back label for reference
• Color variation (clear to slight yellow) is normal and not a flaw
• Keep bottle sealed and stored cool when possible

Who is this for: This serum is aimed at adults seeking a targeted antioxidant treatment to address uneven skin tone, surface texture, and hydration. It suits those comfortable introducing a high-concentration vitamin C product into their routine and who are willing to patch-test and build tolerance. If you have very reactive skin or are uncertain about interactions with prescription treatments, consult a dermatologist before use.

Ingredients

Ingredients: Water, Ethoxydiglycol, L-Ascorbic Acid (Vitamin C), Propylene Glycol, Glycerin, Laureth-23, Tocopherol (Vitamin E), Sodium Hyaluronate (Hyaluronic Acid ), Ferulic Acid, Panthenol, Triethanolamine, Phenoxyethanol.