Is there protein in the Salon anti-frizz gel?

Yes, it contains silk amino acids. It is common in hair products as it protects hair from moisture loss and conditions it to provide a silky smoothness.  This is a natural water-soluble (and a non-animal protein) source of acid derived from liquid silk. Silk amino acids penetrate the hair to strengthen, rebuild & nourish chemically damaged hair without weighing it down or causing buildup.