{"product_id":"obagi-c20-vitamin-c-serum-15ml","title":"Obagi C20 Vitamin C Serum 15ml","description":"\u003cp\u003e\u003cstrong\u003eObagi C20 Vitamin C Serum\u003c\/strong\u003e is the high-intensity step in the Obagi C Series, delivering 20% pure ascorbic acid for those with established vitamin C routines who want to target persistent pigmentation, enlarged pores, rough texture, and advanced dullness in a single serum. This Japan-domestic formula by Rohto Pharmaceutical builds on the same Deep C Porter and Advanced C Control EX technology as C5 and C10, but at a concentration level designed for visible results on more stubborn concerns.\u003c\/p\u003e\u003cp\u003eAt 20% pure vitamin C, \u003cstrong\u003eSignal Lock Complex\u003c\/strong\u003e works alongside high-dose ascorbic acid to maintain multi-layer hydration — counteracting the dryness that can accompany higher-potency vitamin C use. Vitamin E is co-formulated throughout the series for antioxidant reinforcement and stability. The C20 bottle is slightly larger at 15ml versus the 12ml found in C5, C10, and C25, reflecting its positioning as a more intensive treatment for experienced users.\u003c\/p\u003e\u003cp\u003eC20 is the bridge between the everyday-maintenance C10 and the full-spectrum C25 Neo. If you've used C10 consistently and want to escalate before committing to C25, this is the natural progression.\u003c\/p\u003e","brand":"Obagi","offers":[{"title":"Default Title","offer_id":47705389957373,"sku":null,"price":76.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0810\/7556\/8893\/files\/obagi-c20-vitamin-c-serum-15ml_49b651c7-163d-4c1f-803f-f3b43c8913f6.webp?v=1781337023","url":"https:\/\/tokyoshelf.com\/products\/obagi-c20-vitamin-c-serum-15ml","provider":"Tokyo Shelf","version":"1.0","type":"link"}