this question is complicated to answer because the protein requirement change based on age but here are some recommendations below. the dietary reference intake for protein is calculated using the guideline of 0. 8 grams of protein per kilogram body weight which are the recommendations below. adult men need about 56 grams a day. adult women need about 46 grams a day. you can also calculate your protein needs based on the percentage of calories a day. the protein should consist of 10% and no more than 35% of calories from protein. choosing the right kinds of protein will be most important as most adults consume enough grams of protein a day. this link can give you suggestions on foods that contain protein and this link gives the full protein recommendations. 17
45 year old male. how much protein should i have a day? . i am a 45 year old male 5'10" 236lbs large frame. i had lower back surgery. i go to the gym and use the recumbent bike 6 days a week 10 to 13 miles a day and strength train (all elliptical) 6 days. i do low impact aerobics m-w-f 60mins. i was told by a huge body builder that i should be taking in 1g of protein pr 1lb of body weight. i want to loss weight and get power back. i'm not looking to be a body builder. should i take in 1g per lb? and if so should it go down as my weight goes down?