However, buying a Vitamin C serum isn't as simple as picking the first bottle you see. Because Vitamin C is highly unstable—meaning it can lose its effectiveness when exposed to light or air—you need to know exactly what to look for on the label. 1. Choose the Right Form of Vitamin C
Not all Vitamin C is created equal. The form you choose depends on your skin's resilience: buy vitamin c serum
Look for names like Sodium Ascorbyl Phosphate (SAP) or THD Ascorbate . These are gentler, more stable, and ideal for sensitive or acne-prone skin. 2. Check the Concentration However, buying a Vitamin C serum isn't as
The "gold standard" and most potent form. It works fast but can be irritating for beginners or those with sensitive skin. Choose the Right Form of Vitamin C Not
The Ultimate Guide to Buying Your First Vitamin C Serum (2026 Edition)