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Description
Transderma C Vitamin C Serum is a precision formula built around a single powerful idea: pure L-ascorbic acid delivered directly to the collagen-producing layers of the skin. Developed using a stabilisation technology that keeps vitamin C active without conventional preservatives, the 30 ml bottle gives daily anti-oxidant protection, stimulates collagen and elastin synthesis, and gradually brightens uneven skin tone. No fillers, no fragrance — just vitamin C and its carrier.
Key benefits
- High-purity ascorbic acid — L-ascorbic acid, the most researched form of vitamin C, delivered via a two-component stabilisation system (ascorbic acid + PG carrier).
- Stimulates collagen and elastin production, improving firmness and reducing the appearance of fine lines over time.
- Acts as a potent antioxidant shield against free-radical damage from UV exposure and environmental pollution.
- Gradually brightens dullness and uneven pigmentation with consistent daily use.
- No preservatives, no fragrance, non-comedogenic, hypoallergenic — minimal-formula ethos.
- Ships directly from our Kobe warehouse — original Japanese stock.
Product details
| Brand | Transderma |
|---|---|
| Product name (EN) | Transderma C Vitamin C Serum |
| Category | Skincare |
| Subcategory | Serum / Vitamin C |
| Product type | Face serum |
| Net content | 30 ml |
| Form | Liquid serum |
| Country of origin | Japan |
| Skin type / target user | All skin types; adults seeking brightening and anti-aging |
| Main concerns | Dullness, uneven tone, fine lines, oxidative stress, loss of firmness |
| Key ingredients | L-ascorbic acid (pure vitamin C), propylene glycol |
Who is this for
Recommended for adults who want an unfussy, high-efficacy vitamin C serum — no extras, just the active. Particularly suitable if you are already familiar with vitamin C in skincare and want a concentrated formula to layer under your usual moisturiser or SPF. Works well at any age for brightening and antioxidant protection; especially effective in your 30s and beyond for collagen support. Because the formula contains pure ascorbic acid with no buffers, it may sting briefly on broken skin or very reactive skin — do a brief patch test if you have sensitive skin.
How to use
- After cleansing and toning, dispense 3–4 drops onto the palm.
- Press gently into the face and neck; avoid the eye area.
- Allow 30–60 seconds to absorb, then follow with moisturiser and SPF (morning) or your usual evening treatment.
- Use once daily — morning application followed by sunscreen maximises the antioxidant benefit.
Tip: store in a cool, dark place and close the dropper cap tightly after use; pure ascorbic acid is sensitive to light and air. Discard if the liquid turns dark orange or brown — that indicates oxidation.
Key ingredients
- L-ascorbic acid (Vitamin C) — pure, unmodified form of vitamin C. Stimulates fibroblast activity for collagen and elastin production; neutralises free radicals; brightens melanin-related discolouration.
- Propylene glycol (PG) — carrier and stability agent that transports ascorbic acid through the skin barrier to the active layers where collagen synthesis occurs.
Full ingredient list available on the product packaging. No preservatives used.
Cautions
- For external use only; avoid contact with the eyes and mucous membranes.
- Discontinue use if redness, itching, or irritation persists and consult a dermatologist.
- Patch-test on the inner forearm before first facial use, especially if you have reactive skin.
- Pure vitamin C may sting briefly on broken skin — this is normal and should subside quickly.
- Always follow with broad-spectrum SPF during the day; vitamin C increases photosensitivity.
- Keep out of reach of children. Store away from light, heat and humidity.
Package contents
- 1 × Transderma C Vitamin C Serum 30 ml dropper bottle
Shipping & store notes
- Ships directly from our warehouse in Kobe, Japan.
- Processing time: 2–6 business days.
- Tracking number provided after dispatch.
- Import duties and taxes may apply depending on destination country.
- Opened cosmetics cannot be returned for hygiene and safety reasons.
Authenticity guarantee
Every Transderma product at Tsujimoto Market is sourced directly from Japanese distribution and verified for authenticity. We never sell fakes or grey-market goods. Each order is carefully packed and dispatched with full tracking from Kobe.
FAQ
Q: What concentration of vitamin C does Transderma C contain?
A: The formula uses pure L-ascorbic acid in a two-component system (ascorbic acid + propylene glycol carrier). Transderma does not publicly disclose the exact percentage, but the formula is designed for high bioavailability — the stabilisation technology delivers active vitamin C to the dermis more efficiently than many higher-percentage unstabilised serums.
Q: Can I use this serum in the morning and evening?
A: Yes — it is suitable for both. Morning use under SPF is classic for antioxidant protection; evening use supports overnight collagen synthesis. If you are new to pure vitamin C, start with once daily and increase as tolerated.
Q: Is this the same Transderma C as sold in Japanese clinics?
A: Yes — we source from Japanese-domestic distribution channels, the same stock supplied to Japanese aesthetic clinics and premium retailers. The bottle you receive is the original Japanese version.
Q: Will this vitamin C serum irritate sensitive skin?
A: Pure L-ascorbic acid can cause a mild tingle on first use or on very reactive skin. The formula contains no fragrance, no preservatives and no fillers, which reduces irritation risk compared to complex formulas. A patch test before full-face application is always recommended.
Q: How long does shipping take?
A: After dispatch from Kobe, most regions receive the parcel within 7–14 business days. Tracking is provided. Customs duties or VAT may apply depending on your country.
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