You can feel better during the carb flu by consuming the following:
- plentiful salt, lite salt with half and half potassium chloride and sodium choloride is even better
- magnesium citrate or magnesium malate before bed
- a little fruit if you feel dizzy or hypoglycemic
Since you aren't trying to lose weight and probably have no metabolic damage, you don't need ketosis. You can also train your body to be a "fat burning beast" by doing low-level aerobic exercise such as walking, hiking on moderate trails, running extremely slowly. Did I mention "extremely slowly"? Even slower than that. So long as it's excruciatingly slow, it's not chronic cardio.
If you feel you need more carbs, eat more yams, sweet potatoes and root vegetables.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Highest squat: 167.5 x 2. Current Deadlift: 210 x 3