Shrimp and other shellfish are among the most common food allergens. The Jewish laws of Kashrut forbid the eating of shrimp. According to the King James version of the Old Testament, it is acceptable to eat finfish, but shrimp are an abomination and should not be eaten. In Islam, the Shafi’i, Maliki and Hanbali schools allow the eating of shrimp, while the Hanafi school does not allow it in Sunni Islam as well as the Shi’ite school (Ja’fari).
Shrimp are high in levels of omega-3s (generally beneficial) and low in levels of mercury (generally toxic). As with other seafood, shrimp is high in calcium, iodine and protein but low in food energy. A shrimp-based meal is also a significant source of cholesterol, from 122 mg to 251 mg per 100 g of shrimp, depending on the method of preparation. Shrimp consumption, however, is considered healthy for the circulatory system because the lack of significant levels of saturated fat in shrimp means that the high cholesterol content in shrimp actually improves the ratio of LDL to HDL cholesterol and lowers triglycerides.
A ripe fruit of banana contains as much as 22 percent of carbohydrate, mainly as sugar, and is high in dietary fibre, potassium,manganese, and vitamins B6 and C. They are grown mostly in tropical countries.
Bananas are ideal for people looking to lose or maintain weight through sound nutrition, while also giving the body sustenance for daily strength and fitness.
source: Wikipedia, Encyclopedia Britannica, how stuff works