Eat 1/3 of calories from protein (improves immune system, improves healing rate & mood, your blood has amino acid levels like sugar, respect them). Substitute simple sugars (2-10% thermogenic calorie loss in digestion which also correlates to low prebiotic value) for complex carbs (~30%). Eat more fiber. Just buy some dextrin it’s a lot cheaper than produce.
Eat potassium (spinach, cabbage, potatoes, milk, oranges, NOT bananas you’d need 12 daily) and iodine and a multivitamin (lacks both in USA) so you stop feeling a weird craving for food that never can be satisfied.