This vitamin C serum brightened my skin but has a temporary rancid oxidation smell after application.
This vitamin C serum delivers a radiant complexion and quick absorption, though it develops a brief rancid smell as the antioxidants oxidize on my skin post-use.
This is a review of product:
TIRTIR Pure Vitamin C 24% Face Serum – Dark Spot Remover for Sensitive Skin with Collagen Anti Aging Even out Skin Tone Non irritation tested, Wrkinkles, Korean Mild Vita C Facial Serum 1.01 Fl Oz
From Amazon.com
This product does the job my face is glowing. On application the product has no smell. But it has a really bad smell after 1-5 minutes post application. I assume the vitamin C oxidize and smells very rancid.
Vitamin Basics & Tips
Why Does Vitamin C Serum Smell After Application?
The rancid odor occurs when vitamin C (ascorbic acid) oxidizes upon exposure to air. Oxidation breaks down the antioxidant, reducing efficacy – store it in dark, airtight packaging to slow this process.
Benefits of Vitamin C for Skin
Vitamin C boosts collagen production, fades hyperpigmentation, and protects against free radicals. Your "glowing" effect likely stems from improved skin texture and light-reflecting hydration.
Maximizing Vitamin C Serum Effectiveness
Apply to clean, dry skin before moisturizer. Pair with vitamin E or ferulic acid to stabilize the formula. Morning use enhances sun damage protection alongside sunscreen.
Identifying Spoiled Vitamin C Serum
While mild oxidation smells are normal, a persistently strong rancid odor or dark yellow/orange color indicates complete degradation. Discard if texture becomes sticky or separated.
Alternatives for Sensitive Users
If the smell bothers you, try derivatives like sodium ascorbyl phosphate or tetrahexydecyl ascorbate. These stable forms offer similar benefits without strong oxidation odors.
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