Yes, you can use a brow serum on microbladed brows. However, it is important to wait until the microbladed area has fully healed before applying any products to the brows. This typically takes about four to six weeks. Once the area has healed, you can incorporate a brow serum into your skincare routine to help nourish and condition the brow hairs. Look for a serum that contains ingredients like peptides, biotin, and nourishing oils to promote healthy hair growth. Remember to always follow the instructions provided by the product manufacturer and consult with your microblading artist if you have any concerns.