Buy Vitamin C: Serum

More isn't always better. A serum needs at least an to be effective, but anything over 20% often causes more irritation without providing extra benefits. Top-rated vitamin C serums designed for sensitive skin

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 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 More isn't always better

Not all Vitamin C is created equal. The form you choose depends on your skin's resilience: Because Vitamin C is highly unstable—meaning it can

The "gold standard" and most potent form. It works fast but can be irritating for beginners or those with sensitive skin.