This product is from the house of numbers. 1 Doctor-suggested Serum Q-Sera Hair Serum. Q-Sera Revitalizing Shampoo is a daily-use shampoo that removes debris, exfoliates, helps prevent hair loss and the growth of thick hair. Q-Sera Revitalizing Shampoo Unlike harsh shampoo, free of harsh chemicals. Q-Sera Revitalizing Shampoo for Complimentary Hair Regrowth Treatment. Q-Sera Revitalizing Shampoo designed for both men and women.