Inconvenient
A low carb lifestyle may lead to successful weight loss, but as these diets lose their "fad" status, low carb specific products are disappearing from store shelves. Recipes such as those outlined in The South Beach Cookbook are low carb versions of many traditional recipes; however to eliminate the carb count in these foods, they must be prepared from scratch. The absence of low carb convenience food leaves the dieter to prepare their own food, which can be both time consuming and costly.
Restrictive
Low carb diets strive to eliminate some or all carbohydrate intake; eating plans such as the Atkins and South Beach diets allow dieters to do this in stages. The first stage of the diet is a very restrictive phase, in which the dieter must avoid all carbohydrates. The restrictions of this phase make food choices more difficult, both at home and when dining out. These restrictions can also cause issues if the dieter is preparing meals for a family or others who are not following the diet.
Fat Intake
In low carb diets and products, the sugars are reduced; however, in many situations these products have a higher fat content than their non low carb counterparts. It is necessary for the dieter to read the nutrition content labels carefully, as fat content can still cause weight gain, even while following a low carb diet. Outside of prepackaged foods, the restrictions of the diet can steer dieters towards higher fat foods, such as cheese and meats. While the purpose of a low carb diet is to force the body to burn fat, in many cases the fat is coming from the diet and not from the stored fat cells of the body, resulting in little to no weight loss.
Nutrition
The low carb diet steers the dieters towards specific foods. These diets are rich in lean meat,
dairy, and fats with little emphasis on nutrition. The absence of certain fruits and vegetables in a low carb diet, due to their impact on the body's blood sugar levels, can lead to a lack of essential vitamins and nutrients. Followed long term, it is possible to create a vitamin deficiency or a higher LDL cholesterol than is considered acceptable.Weight Gain
The low carb diet can cause rapid weight loss, however in the initial stages of the diet this is often caused by water weight and is gained back as the dieter progresses to more normal, stable eating habits. As the dieter lessens restrictions on their carb intake, the weight lost in the initial phase of the diet may be reversed. If the dieter ceases to restrict their carb intake, the weight lost in the dieting processes is likely to return. The process of losing and gaining weight, called "yo yo dieting," can cause nutritional deficiency, problems with the liver and other organs, and osteoporosis.


