Blackmores Lyp-sine® relieves symptoms of facial cold sores. Blackmores Lyp-Sine® is a dose of the amino acid lysine, which relieves symptoms of cold sores.Blackmores Lyp-Sine® contains vitamin C and zinc to support wound healing and support immune system health.Contains the amino acid lysine, which is an essential amino acid which can not be synthesised by the body and must be obtained form the diet. Size: 30 tablets Lysine is an essential amino acid that cannot be synthesised by the body and must be obtained from the diet.