Liver is good for anemic patients since is high in Iron ...

Animal livers are high in vitamins

Liver (food)
Nutritional value per 100 g (3.5 oz)
Energy 561 kJ (134 kcal)
Carbohydrates
2.5 g
Fat
3.7 g
Protein
21 g
Vitamins
Vitamin A equiv. (813%) 6500 μg
Riboflavin (B2) (250%) 3 mg
Niacin (B3) (100%) 15 mg
Vitamin B6 (54%) 0.7 mg
Folate (B9) (53%) 212 μg
Vitamin B12 (1083%) 26 μg
Vitamin C (28%) 23 mg
Trace minerals
Iron (177%) 23 mg
Sodium (6%) 87 mg