While most people either love or hate shellfish, your body will love the vitamins they contain. Just 100 grams of clams contain over 16 times the recommended daily intake of Vitamin B-12. 100 grams of oysters contain 600% of the recommended daily intake of zinc. That number is 200% for copper. Shellfish are also packed with vitamin D. If you enjoy it, try and incorporate it more into your foods. Your body will thank you.