When looking for a vitamin C serum for sensitive skin, it is important to consider the ingredients, concentration, and packaging. Here are some of the best vitamin C serums for sensitive skin based on the search results:

1. Vitamin C, E + Ferulic Acid Serum by Marie Veronique: This serum is perfect for sensitive skin as it is blended with 5% ascorbic acid, 2% vitamin E, and 5% ferulic acid.

2. RoC Multi Correxion Revive + Glow 10% Active Vitamin C Serum for Face: This ultra-gentle formula can be used even by people who are dry or who have previously experienced irritation with other vitamin C formulas.

3. Tetrahexyldecyl ascorbate: This is a gentler form of vitamin C that’s suitable for sensitive skin. It is prized for being a gentler form of vitamin C that’s suitable for sensitive skin.

4. Vitamin C Suspension 10% + HA Spheres 2% by The Ordinary: This serum contains a lower concentration of L-ascorbic acid (10%) for folks prone to irritation. It also contains skin-smoothing silicone for immediate results and hydrating hyaluronic acid.

5. Beauty Shield Vitamin C Pollution Prevention Serum by e.l.f: This drugstore serum is a budget-friendly option for sensitive skin.

It is important to note that when using a vitamin C serum, it is recommended to start with a lower concentration and gradually increase it over time to avoid irritation. Additionally, it is best to look for serums that are packaged in dark or tinted glass bottles with airless delivery to protect the vitamin C from light and air, which can cause it to break down and lose its effectiveness.