Vitamin C and retinol reign supreme in the skincare world. They promise brighter, more even-toned skin, antioxidant protection, diminished dark spots, improved texture—the list goes on. Essentially, they can do almost everything… except you can’t simply swallow them for results.
You’ve likely invested in a popular Vitamin C serum, eager to see miraculous changes. Weeks pass, and your skin looks the same—dark spots persist, dullness remains—and you’re left wondering: was it a scam? Or is your skin “immune” to Vitamin C?
Common Missteps with Vitamin C
If your Vitamin C serum isn’t delivering, it’s probably due to one or more common mistakes. Skincare expert and facialist Cristina Galmiche explains, “Everyone knows Vitamin C is important, but not everyone knows how to use it properly.” Paula Cicuéndez, a pharmacist specializing in dermatological cosmetics, adds: “Vitamin C is a key antioxidant. In summer, your skin faces UV exposure, pollution, and oxidative stress that accelerate aging. Vitamin C neutralizes free radicals, prevents cellular damage, enhances natural radiance, and boosts sunscreen efficacy for comprehensive protection.”
Here are the top errors to avoid:
1. Choosing the Wrong Concentration
Cristina Galmiche says, “It depends on the Vitamin C form and your skin type. Pure Vitamin C works best at 10–15%. Sensitive skin may need gentler formulations. Stable Vitamin C derivatives can be effective even at 5%.”
2. Skipping Sunscreen
Contrary to myths, using Vitamin C in summer won’t cause dark spots—but sunscreen is still essential. Paula Cicuéndez explains, “Vitamin C protects against sunlight, pollution, and oxidative stress, but it can’t replace SPF. Apply it first, then layer sunscreen for maximum defense.”
3. Mixing With Irritating Ingredients
Vitamin C is best applied in the morning after cleansing, before sunscreen. Galmiche warns, “Avoid combining it with strong acids or exfoliating treatments in the same routine, as this can irritate your skin and reduce tolerance.”
4. Using Expired or Improperly Stored Products
Pure Vitamin C oxidizes easily, turning deep orange. Applying it in this state can clog pores and reduce effectiveness.
5. Poor Formulation
Paula Cicuéndez emphasizes, “Not all Vitamin C forms are stable or effective. Incorrect pH or concentration can render a serum useless. Sensitive skin or conditions like eczema should avoid high-strength Vitamin C until the skin barrier is stabilized.”
6. Expecting Instant Results
Vitamin C is not a miracle overnight. Consistent use is key. Noticeable improvements—brighter complexion, smoother texture—typically appear within three to four weeks. Its strength lies in prevention and gradual skin enhancement.
