Derma-3 Twist Caps For Medium & Large Dogs, 60 Capsules Concentrated Omega Essential Fatty Acids & Vitamin Supplement Sogeval Derma-3 Twist Caps provide a concentrated source of Omega-3 Fatty Acids in free form for optimal bioavailability. Derma 3 Twist Caps recommended to help support the immune system and joint health, and also promote healthy skin and hair.