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Few things 1. You are perfectly healthy in weight. Don’t try to loose too much. 2. If you do a lot of sports you need between 1.4-2.2 grams/kg. In your case 75-120g. If you are in caloric deficit you need more protein (towards the 120g) than if not.
Women need their fats for their hormone cycle. About 1g/kg is rule of thumb. In your case about 55g. Preferably if the healthy type from salmon or avocado etc.
But please. You are already thin enough. So if you go to the gym and just eat normally you might see your body change in shape a bit without loosing or maybe even gaining weight. Muscles are heavy, if you gain them it’s not an issue at all.
TLDR; don’t loose weight or start dieting, do go to the gym and enjoy some exercise. Add some muscle.
Eating disorders are seriously dangerous. Make sure you stay away from getting one.
Be sure you don’t cut too low for calories!! It’s a dangerous slope of not eating enough and causing your body to then cling to the fat you do have as it thinks the body is starving.
You need to provide your body with food so it knows it is okay to burn through the food stores (fat). Do not be afraid to eat.
At your current weight and height you might even want to revisit fat loss and consider adding strength training to your routine. A small body still looks overweight or fat if there’s no muscle definition/toning. It’s one of the reasons the term ‘skinny fat’ exists.
0.8g/kg is already an inflated amount and is enough for almost everyone, including people who are active. Getting a bit more is unlikely to be harmful. Actual athletes/bodybuilders/etc can use slightly more.
I listen to mind pump a lot and when they say you’re trying to lose weight do 1 gram for every 1lb of lean body weight and then do the other Marcos after that. And to be honest 122 at 5,2 is really lean…. My wife is 5,0 and 135 so I know roughly that your in a healthy weight.