The South Beach Diet was designed by a cardiologist, Dr. Arthur Agatston, who says he didn't intend it as a low-carbohydrate diet but rather a balanced nutrition plan. However, the maximum carbohydrate intake during the diet is 28 percent of your total daily caloric intake. This is less than the 45 to 65 percent recommended by the Institute of Medicine, which can be hazardous to your health. Talk with your doctor before drastically lowering your carbohydrate intake.
Gastrointestinal Problems
During the first phase of the South Beach Diet you are allowed to obtain only about 10 percent of your daily caloric intake from carbohydrates. All breads, fruits and nuts are prohibited during this phase, which may leave you deficient in fiber. Whole grains, fruit and vegetables are significant dietary sources of fiber, and if you lack fiber you may experience gastrointestinal complications such as constipation and bloating. Tasteless fiber substitutes are available in drug and grocery stores that you can add to drinks and soft food. Talk with your doctor before adding any supplements to your diet and if your gastrointestinal symptoms don't subside.
Ketoacidosis
Your body uses carbohydrates and glucose for energy, so when you restrict these sources, your body begins to break down fat stores for energy, which can lead to ketoacidosis. You are at the highest risk of this condition during phase one of the South Beach Diet, since carbohydrates and sugars are vastly minimized. Ketoacidosis can lead to a buildup of partially broken-down fats, or ketones, and acid in your body. Left untreated, this condition can lead to feeling light-headed or to a coma, stupor or even death.
Fatigue
You may feel fatigued and tired throughout the day during the initial stages of the South Beach Diet. Your body depends on carbohydrates as fuel. MedlinePlus states that carbohydrates are, "the most important source of energy for your body." Therefore, when you shock your body by taking away its main source of energy, you will feel sluggish while your body transitions to use other energy sources such as protein and healthy fats. If you still feel fatigued after three weeks of the diet, talk with your doctor about other potential health complications you may be experiencing. Additionally, be cautious not to consume excess amounts of caffeine and other stimulants during the diet.
Malnutrition
Carbohydrates are significant dietary nutrients, and if you do not consume a sufficient amount you will be at risk of malnutrition, according to MedlinePlus. Symptoms of malnutrition include dizziness and fatigue. If you experience any of these symptoms, you should work with your doctor or dietitian to come up with a modified version of the South Beach Diet that fits your health needs. Malnutrition can be a serious health hazard if left untreated, so pay attention to the changes in your body when you make changes to your diet.
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