Phytonics L-Lysine Comp based on L-Lysine (essential amino acid) and vitamin B6 to support the resistance against (herpes)infections and viruses. L-Lysine is an important component of proteins and has an effect on the immune system, especially the production of antibodies. Phytonics L-Lysine Comp with vitamin B6 is an animal feed supplement for cats, horses and dogs.