The daily intake of protein is a hotly contested concept. In fact if you google it you will get so many personal opinions, studies, and guides that it can be overwhelming. You can try some of the complicated formulas you can find online that factor things like gender, age, current body weight, and goals or you can apply extremely difficult concepts like the 2g of protein per pound of bodyweight.
The 2 grams of protein per pound of bodyweight you want to be is commonly advertised online as the “bodybuilder’s recommended” protein intake. While there probably aren’t too many health negatives for taking in such a high intake of protein, the real downside is how difficult it can be to maintain day in and out. You should also consider the benefits and if its worth while going to such extremes to achieve them. I will say if you are athlete or have any interest in competing, follow this method.
However, for the average person a far more conservative approach of 1 gram of protein per pound of bodyweight is more acceptable. There are many studies online available that show this to be a good intake of protein for men and women of all ages. It’s important to consider whether you want to bulk up, maintain, or lose weight. For example, someone wanting to bulk up should calculate the protein intake based on their goal weight. So if you weight 180 pounds but want to be 200 pounds, using 200 pounds as the weight would mean you need to eat 200 grams of protein a day.
Hope that helps!