Protein is considered perhaps the number one macronutrient for fat loss.
However, as with ANY food you can have too much of a good thing.
The human body has a limit to the amount of protein it can actually utilize daily. One of the most well respected research studies conducted by Dr. Peter Lemon determined that even athletes benefited from just .73 grams of protein per pound of body weight daily. src.
A more general rule of thumb suggests that people aim for 1g per pound of body weight. Excess protein isn't harmful for those with proper functioning kidneys, but the notion that dieters benefit from massive quantities of protein is a myth perpetuated by the supplement industry.
Most people can shoot for around 20-30 grams of protein per meal.
Some foods are better protein sources than others. However, some higher-protein food sources may have higher carbohydrate and fat content.
Learn to make good choices by using the list below.
If in doubt choose protein from foods that are unprocessed or minimally processed and as lean as possible.