Should you cut macronutrients like protein, fats, and carbs when cutting calories or can you eat the same amount?

Hypothetical numbers here just for easier visualization:

Let’s say a person needs 2000 calories a day: 100g of carbs, 100g of protein, and 100g of fats. If this person was to go on a diet for weight loss and cut his calories in half to about 1000 calories, should he also cut his carbs, protein, and fats in half to be at 50g each?

What if this person cuts 1000 calories from his diet, but somehow remains eating the same 100g of fat, 100g of carbs, and 100g of protein, will he still lose weight because of the 1000 calorie reduction or will the high macronutrient intake undo the deficit and ruin the weight loss?

submitted by /u/yungmarvelouss
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