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The evidence on the exact amount isn’t hard evidence. More is gonna be extra insurance and won’t cause harm assuming you’re not taking too much. I just do .8g/lb. In theory if you’re in a calorie deficit extra protein is more important compared to if you’re in a surplus. If you’re having a hard time hitting your goal that’s exactly what supplementation is for. My shakes are 50 grams and in a deficit I have 2 a day. It’s not the most ideal, but it’s better than not hitting my protein goal. My shakes are 30 grams of casein and 20 grams of whey.
Most of the smartest fitness people (renaissance periodization Layne Norton, Paul Carter, etc) agree that .8ish-1ish gram per pound is best for optimizing body composition. So 170 would be fine and you’d get slightly better results if you went between 180 and 225
1 gram per kg is ok if you’re at maintenance but especially if you’re in a deficit it’s not going to be high enough
170 is enough but you shouldn’t struggle to hit 225. How tall are you? What kind of body composition do you have? The amount of protein is based on your lean body mass. 225 is heavy so I will assume you are are carrying some if not alot of body fat. You can base the protein requirement on an estimated lean body mass or on your goal weight. When in a deficit protein consumption becomes more important, hit your targets.