Overnight Scalp Barrier Serum with Triple Balancing Action helps to strengthen the natural skin barrier function, for improved scalp health. Powered by Aloe Vera and AHA's, our fast-absorbing formula features a Triple Balancing Action, working to help lock-in moisture, decrease sebum levels and balance the scalp's microflora. Helps to protect and strengthen while you sleep. Suitable for all scalps. Dermstore has partnered with Flex to allow you to use your Health Savings Account (HSA) or Flexible Spending Account (FSA). This means you can now use your HSA or FSA debit card to buy Philip Kingsley products with pre-tax dollars, resulting in net savings of 30-40%, depending on your tax bracket. Eligible for HSA/FSA with a letter of medical necessity at checkout. From dermatologist-recommended treatments to solutions for chronic skin conditions like acne, eczema, and rosacea, these products are both effective and eligible. | Philip Kingsley Overnight Scalp Barrier Serum with Triple Balancing Action, 60 ml | Dermstore