FAQs
Q1. What form of Vitamin C does Dermatica Rejuva C use, and why does the form matter?
A1. Rejuva C uses L-Ascorbic Acid — the purest, most potent, and most researched form of Vitamin C. Unlike ester derivatives (Ascorbyl Palmitate, Sodium Ascorbyl Phosphate), L-Ascorbic Acid works directly without needing to convert to an active form in the skin. This means faster and more powerful results — but it also means the formulation requires careful pH management (effective at pH 2.5–3.5) and is more prone to oxidation. Dermatica Rejuva C delivers the high-potency Ascorbic Acid in an Antioxidant Complex that buffers the formula for stability without sacrificing efficacy.
Q2. Can Niacinamide and Ascorbic Acid (Vitamin C) be used together in Rejuva C without a reaction?
A2. Yes — and this concern is based on outdated in vitro research suggesting the two could form niacin (causing temporary flushing). Modern formulations, including Rejuva C, are pH and temperature stabilised to prevent this reaction in real-world use conditions. Niacinamide in Rejuva C adds a complementary mechanism to the Ascorbic Acid: while Vitamin C inhibits tyrosinase (melanin production), Niacinamide inhibits the transfer of melanin from melanocytes to skin cells — a separate step in the pigmentation pathway. Together they are more effective for discolouration than either alone.
Q3. Is Dermatica Rejuva C suitable for Indian skin with hyperpigmentation, sun spots, and PIH?
A3. Yes — L-Ascorbic Acid is one of the most well-documented topical ingredients for hyperpigmentation reduction. For Indian skin, which tends to hyperpigment easily after sun exposure, inflammation, or acne, Rejuva C's combination of pure Vitamin C, Niacinamide, and Hyaluronic Acid addresses pigmentation while maintaining hydration. Used every morning under SPF, Rejuva C helps prevent new UV-induced pigmentation (antioxidant neutralising of free radicals) while gradually fading existing marks.
Q4. How should Dermatica Rejuva C be stored to prevent the Ascorbic Acid from oxidising?
A4. Keep Rejuva C in a cool, dark location — away from direct sunlight, heat, and moisture. If the serum turns yellow-to-orange, it indicates some oxidation but the product is still usable; if it turns brown or dark orange, potency has significantly degraded. Antioxidant complexes in the formula slow this process, but for longest shelf life, store at room temperature (below 25°C), keep the cap tightly closed, and avoid leaving it in humid bathrooms.
Q5. How does Dermatica Rejuva C differ from Dermatica C-Prime Cream?
A5. Rejuva C contains pure L-Ascorbic Acid — the most potent form of Vitamin C, with the fastest and strongest brightening effect, suitable for those who can tolerate it. C-Prime uses Ascorbyl Palmitate in a vectorized (encapsulated) delivery system — an oil-soluble, significantly more stable ester that is gentler and suited to sensitive skin or those new to Vitamin C. If you are experienced with Vitamin C actives and want maximum efficacy, Rejuva C is the stronger choice. If you have sensitive or reactive skin, C-Prime is the better starting point.