Nutri-Lys gel by ProConcepts Animal Health is a lysine supplement for cats formulated to support immune health. This oral gel delivers L-Lysine at 200 mg/mL, with 250 mg per 1.25 mL (1/4 teaspoon) serving. The 142 g tube offers a convenient format for pet parents seeking trusted cat supplements and cat vitamins. No prescription is required in Canada.