Originally Posted by vsabino
I agree with you that leaving a whole category of nutrient out of your diet for PROLONGED periods of time can be dangerous (most of all because you overconsume other categories, e.g. proteins that then have to go through your kidneys).
Truthfully, you're not leaving out any category of nutrient when you low-carb. Your body can generate limitless amounts of the glucose it needs to function properly when provided with fat and protein to process. The same can't be said if you decide to substantially reduce fat or protein (technically you do store ingested carbs as fat but only if you eat them to excess; however, even moderate amounts of carbs from starch and grain sources have other significant health effects, such as higher blood glucose and subclinical chronic inflammation).
If you've got healthy kidneys then protein isn't a major concern. Yes, the kidneys have to do more work (increased filtration) when you eat more protein, but this isn't detrimental. And the increased net acid load can be offset by eating plenty of calcium-rich leafy greens.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).