The RDA for protein for healthy adults is 0.8 g / kg. That means that eating 0.8 g of protein per kg of body weight will be enough to meet the needs of 98% of the population. If you think you work out enough to put you in the 2% of the population that has needs above that, then usually up to 1.2 g / kg is recommended. That is what you NEED. But what you prefer, or find optimal, may be higher than that. Protein can help with satiety, so many people prefer having more. Eating more protein while trying to lose weight may also be beneficial and muscle-sparing. But as far as what you need, 0.8 g / kg is sufficient. We seem to overemphasize protein a lot for some reason but you actually don't need that much of it to stay healthy and perform optimally in the gym.