Give yourself an at home Scalp Treatment with Surethik Hair Strengthening Serum: After you shampoo and condition, apply SureThik Serum to your scalp and massage in thoroughly. Feel the serum begin to warm up and tingle as you massage your scalp. This wakes up the folicals, stimulates new hair growth and helps to block DHT. DHT is the hormone your body produces that causes hairloss as you age. The Serum penetrates deep into the root to protect against DHT and helps to provide a healthly growth environment for new hairs to grow.