CARBOHYDRATES AND VITAMINS:
You do NOT need to eat large amounts of fruits and vegetables to get your daily supply of vitamins. While we do get some vitamins from fruits and vegetables, we can get most of them from animal foods. Even more importantly, there are many vitamins and cofactors that we ONLY get from animal foods. This means that if you don’t eat any animal foods you will probably develop a deficiency in some vitamin. . . and except for chromium, animal foods supply more of each mineral. . . . . The truth is, vitamins and minerals are abundantly available in animal foods, and generally animal foods supply more of them per individual serving than does any single serving of a fruit, vegetable, or grain.
Since excess carbs reduce the body’s ability to metabolize fatty acids due to the anabolic effects of insulin, l-carnitine is suggested to supplement for the first few weeks of reducing carbs if you experience any muscle fatigue or leg cramping.
From Life Without Bread: How a Low Carbohydrate Diet Can Save Your Life by Christian B. Alan, PhD and Wolfgang Lutz, M.D., p 147
Also, please see out Top 14 Best Foods.