Tsujimoto Market: Our Guarantees
Description
Ryu Spa Resort Whitening Serum 30 ml — Vitamin C Brightening Serum from Okinawa
Overview
Ryu Spa is an Okinawan brand that builds its formulas on purified deep sea water from Kumejima. This serum is registered in Japan as a medicated (quasi-drug) brightening product, with 3-O-ethyl ascorbic acid as the declared active — a stable vitamin C derivative that does not oxidize as quickly as pure ascorbic acid.
The rest of the formula leans soothing and antioxidant: aloe, rosehip, acerola and mulberry extracts, dipotassium glycyrrhizate, hyaluronic acid and fermented prune extract. Texture is a clear, light gel-fluid that absorbs without stickiness. Cosmetic product, not a medicine. We ship from Kobe, Japan.
Key Benefits
- ✓ Medicated (quasi-drug) formula with 3-O-ethyl ascorbic acid as declared active
- ✓ Stable vitamin C derivative — less prone to oxidizing than L-ascorbic acid serums
- ✓ Dipotassium glycyrrhizate and aloe extract for a calmer feel on reactive days
- ✓ Rosehip, acerola and mulberry extracts add plant antioxidant support
- ✓ Hyaluronic acid keeps the light texture from feeling drying
- ✓ Clear gel-fluid absorbs fast and layers under emulsion or cream
- ✓ Okinawan deep sea water base, dispatched from Kobe with tracking
Product Details
| Brand | Ryu Spa (Okinawa, Japan) |
|---|---|
| Product name (EN) | Ryu Spa Resort Whitening Serum |
| Category | Skincare |
| Subcategory | Serum / essence |
| Product type | Medicated brightening serum (Japanese quasi-drug) |
| Size / net content | 30 ml |
| Form | Light gel-fluid |
| Fragrance | No added fragrance noted |
| Country of origin | Japan |
| Skin type / target user | All skin types; dull or uneven-looking skin |
| Main concerns | Dullness, uneven tone, dark spots |
| Active ingredient | 3-O-ethyl ascorbic acid (stable vitamin C derivative) |
| Signature base | Purified deep sea water from Kumejima |
Who Is This For?
- Skin looks dull or tired and you want a daily vitamin C step
- You have uneven tone or spots you would like to keep from looking more visible
- You want vitamin C but find L-ascorbic acid serums too unstable or stinging
- Suitable across skin types thanks to the light, non-oily texture
- Not the right pick if you have a known vitamin C sensitivity or want a fragrance- and preservative-free formula
How to Use
- Cleanse and apply your lotion or toner first.
- Dispense about 3 pumps into your palms.
- Spread gently over the whole face, avoiding the immediate eye area.
- Press palms to the skin for a few seconds, then follow with emulsion or cream.
Frequency: Morning and/or evening
Full Ingredients
Active ingredient: 3-O-ethyl ascorbic acid (stable form of vitamin C).
Other ingredients: purified Kumejima seawater, BG, glycerin, 1,2-pentanediol, sodium hyaluronate (HA Na-2), aloe extract, rosehip extract, acerola extract, mulberry extract, hydrolyzed collagen, fermented prune extract, dipotassium glycyrrhizate and others.
Transcribed from the Japanese package; the list ends with "and others", so please check the label on your unit if you track every ingredient.
Cautions
- Patch test before first use — vitamin C derivatives can sting sensitized skin
- Do not apply to broken, sunburned or irritated skin
- Discontinue and consult a dermatologist if redness, itching or swelling occurs
- Daily sunscreen is recommended alongside any brightening routine
- Store away from direct sunlight and heat; keep out of reach of children
Package Contents
1 × Ryu Spa Resort Whitening Serum, 30 ml, in original Japanese retail packaging.
Shipping & Store Notes
- Ships directly from 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 product at Tsujimoto Market is sourced directly from Japan and verified for authenticity. We never sell fakes or grey-market goods. Each order is carefully packed in Kobe, Japan and dispatched with full tracking.
FAQ
How is 3-O-ethyl ascorbic acid different from plain vitamin C?
It is an ethylated derivative that stays stable in water-based formulas far longer than L-ascorbic acid, which oxidizes and turns yellow quickly. It is generally gentler, though the trade-off is a slower, milder effect.
Will it remove existing dark spots?
No cosmetic serum removes spots. In Japan the quasi-drug brightening claim covers helping keep tone even and limiting the look of new spots forming. For established pigmentation, see a dermatologist.
Can I use it with retinol or acids?
Yes, but not all in one sitting if your skin is reactive. A common approach is vitamin C in the morning and retinol at night, with daily sunscreen either way.
Is it halal-suitable?
No. The formula contains hydrolyzed collagen, typically animal-derived in Japanese skincare, and carries no halal certification.
How long does shipping take and are duties included?
We dispatch from Kobe within 2–6 business days with tracking. Import duties and taxes depend on your country and are not included in the price.
