How much protein should a 42 year old 5'7 149 female have?

Answer 1

:

Without knowing more detail it is not possible to tell you exactly. I can only give you approximate example which should answer your question well. Remember: to keep healthy you have to ballance all nutrients not only protein. The following are usually calculated in %.

If you eat 2000 cal/day you need: 275 g Carbohydrates, 125 g Protein and 44 gr Fat

i.e. 1100 cal of Carbohydrates, 500 cal in Protein and 400 cal in Fat