Why Your Vitamin C Serum Stops Working (And the Stability Secret You Should Know in 2025)

Introduction: The Oxidation Problem Nobody Talks About

You bought a Vitamin C serum. It looked clear and golden. Two weeks later, it’s turned brown, smells weird, and suddenly your glow is gone. Sound familiar?

This is the #1 frustration mindful buyers share: “Is my Vitamin C even working?”

The truth: most Vitamin C serums fail because of instability. Here’s what you need to know in 2025.

❌ Why Most Vitamin C Serums Fail

• Unstable forms: Oxidise quickly, lose potency.
• Wrong concentration: Too low (<5%) = no results. Too high (>20%) = irritation.
• Bad packaging: Clear bottles expose Vitamin C to light/air, killing it faster.

🧪 The Stability Secret in 2025

The perfect Vitamin C formula is about balance:

• 10% concentration (clinically proven sweet spot).
• Stabilised ascorbic acid with correct pH (3.5–4).
• Opaque packaging to prevent oxidation.
• Dermat-tested on Indian skin.

FAQs: Vitamin C Serum Stability

Q1. Why does my serum turn brown? That’s oxidation = it’s lost its power.
Q2. How long should Vitamin C last? 3–6 months in stable packaging.
Q3. What % works best? 10% is safe, effective, and clinically proven.

Buy the Best! Foley Vitamin C 10% Serum for Face is the hottest roll-on in the Market:

• Shop on Amazon
• Buy on AJIO

Soooo, you are a Mindful Buyer too? We’ve been waiting for you 🙂

A mindful buyer doesn’t get carried away by glossy ads or quick-fix promises. You look deeper, you want real science, tested results, and products that genuinely work for your skin and hair.

Each blog cuts through the noise and gives you straight answers, so you can make choices with confidence, not confusion.

Other blogs in the series:

• Best Tinted Sunscreen in India (2025) for mindful buyers.
• Best 2% Salicylic Acid Face Wash in India Under 300 (2025 Guide)
• Myths About Hair Growth Serums in India (2025)
• Real Truth About Indian Underarm Roll-Ons

Why Thousands of Indians Are Switching To Foley, EVERYDAY!

From glowing testimonials to thousands of positive reviews, the verdict is clear: Foley, a Surat-based skincare brand delivers what it claims.

Every product is:

• Science-backed with clinically tested ingredients.
• Designed for Indian skin facing pollution, heat, and everyday stress.
• Loved by a growing community who share their glow journeys with us online.

Connect with Foley Fam, however you wish, you beautiful beautiful soul:

🌐 Website: https://foleyskincare.com/

📺 YouTube: https://www.youtube.com/@FoleySkincare/

📸 Instagram: https://www.instagram.com/foley_skincare

📌 Pinterest: https://in.pinterest.com/foleyskincare