Generic Vitamin C Serum 15% L-ascorbic Acid — 1 fl oz (29 mL), with Vitamin E & Ferulic Acid

Trader Vitamin C Serum is a dermatologist-formulated antioxidant serum combining 15% L-ascorbic acid, 1% tocopherols (vitamin E), and 0.5% ferulic acid in a 1 fl. oz. dropper bottle.

This lightweight, water-based serum blends a clinically common concentration of pure L-ascorbic acid with stabilizing antioxidants to deliver a vitamin-rich topical treatment. The formula is built to keep vitamin C and E working together: tocopherols supply complementary antioxidant support while ferulic acid helps preserve the potency and stability of the blend. Packaged in a compact 29 mL bottle, the serum is appropriate for daily use in most skincare routines when applied carefully with sunscreen during daytime.

How do the active ingredients work together in this serum?

L-ascorbic acid is the active form of vitamin C used for topical antioxidant support, while tocopherols add lipid-soluble vitamin E benefits. Ferulic acid helps slow degradation of both vitamins, improving shelf-life and performance. The three-act combination is a common formulation strategy to maintain potency and broaden antioxidant coverage.

• 15% L-ascorbic acid: concentrated water-soluble antioxidant.
• 1% tocopherols: oil-soluble vitamin E for complementary support.
• 0.5% ferulic acid: stabilizer that protects vitamins from oxidation.

When and how should I add this serum into my routine?

Apply after cleansing and any water-based treatments, before moisturizers and sunscreen. For daytime use, allow the serum to absorb for a minute then follow with broad-spectrum SPF. Start with every other day if you have sensitive skin, moving to daily as tolerated.

• Use on clean, dry skin—press 2–3 drops across face and neck.
• Apply sunscreen after the serum for daytime protection.
• If irritation occurs, reduce frequency or use at night.

What packaging and storage keep this vitamin C effective?

Vitamin C in L-ascorbic acid form is light- and air-sensitive; darker, tighter packaging and cool storage help maintain activity. The 1 fl. oz. dropper bottle reduces exposure and is sized for regular use so you’re less likely to keep an open bottle long enough for significant breakdown. Store away from direct sunlight and heat to preserve clarity and scent.

• 29 mL dropper bottle minimizes air contact during dispensing.
• Keep in a cool, dark cabinet to slow oxidation.
• Discard if color darkens significantly or smell changes.

Are there common precautions or pairing tips to know?

Patch-test before first use if you have sensitive or reactive skin. Avoid simultaneous use with potent exfoliants or retinoids unless introducing slowly; layering strong actives can increase irritation. Always follow with sunscreen during daytime to protect skin and maximize benefits.

• Patch-test: apply a small amount to inner forearm for 24 hours.
• Introduce with reduced frequency when combining with acids or retinoids.
• Daily SPF is recommended after daytime application.

Who is this for: Trader Vitamin C Serum suits people looking for a straightforward, dermatologist-formulated antioxidant step in their skincare—a concentrated L-ascorbic acid option for those accustomed to vitamin C serums or wanting a daily antioxidant pairing with vitamin E and ferulic acid. It’s appropriate for users seeking a water-based serum in a small, controlled-dose bottle; those with very reactive skin should introduce it gradually and consult a skincare professional if unsure.