When it comes to choosing the best serum for oily skin, it’s important to look for lightweight, oil-free formulas that won’t clog pores. Here are some recommendations based on the search results:

1. The Ordinary Hyaluronic Acid 2% + B5: This serum is lightweight and deeply hydrating, making it suitable for oily skin
2. Curology’s Super Serum: This serum contains hyaluronic acid, vitamins A, C, and E, and peptides. It helps hydrate the skin and promote a youthful appearance
3. Lightweight Hydrating Serum: This serum contains vitamins C & E and pomegranate extract. It helps protect the skin from environmental aggressors and gives a youthful, glowing complexion

Remember, everyone’s skin is different, so what works for one person may not work for another. It’s always a good idea to consult with a dermatology provider for personalized recommendations.