None. Some naysayers will state that the diet can be hard on your liver or kidneys but this is not supported by any study. What it does do is lower your blood pressure. Mine went from 149/108 to 119/72 in just 3 weeks. I lost 19.8lbs of fat in the first 2 weeks. I have a scale that measures my percent of muscle and water so I know I didn't just loose water weight. I was experiencing joint pain that I thought was Arthritis or carpal tunnel and that all went away in the first week after breaking my addiction to sugar (high fructose corn syrup) and other carbohydrates. It also can cure some forms of Diabetes. Because the diet burns fat instead of carbohydrates, it keeps your blood sugar levels at a more even rate eliminating cravings and giving you much more even energy so you don't feel run down after not eating for a while. I'll never go back to sugar and processed foods. I feel great!
Carbohydrates rarely cause diseases. If you have either type of Diabetes, you have to watch your carbohydrate intake. Carbohydrates are a human Resource.
Adult-onset diabetes would be the most obvious choice.
carbohydraulisis
hypothyroidism
excessive smoking, alcoholism, not exercising, intake of fatty foods and caffeine
Elevated blood calcium levels and alkalosis caused by excessive intake of milk and alkalis
Alcohol-related neurological disease represents a broad spectrum of conditions caused by acute or chronic alcohol intake.
A lack of the vitamin B3 commonly known as Niacin, can cause Pellagra's disease. This disease can also be cause by an intake of Leucine.
Actually, there is something called alcohol dementia that is caused by excessive alcohol intake over many years.
Excessive leanness from disease or malnutrition is called emaciation. It means to waste away physically. Treatment of emaciation includes gradual renourishment with a slow increase of daily caloric intake to help rebuild tissues and regain weight.
It is excessive salt intake (sodium) which can place an individual at risk of fluid retention.
Excessive intake is when you take in something excessively... For example, if you really enjoy chocolate and happen to win a lifetime supply of it and you eat thirty pounds of it in one day, that would definitely qualify as "excessive intake."
Excessive fats intake can cause high blood chlostrol, obesity and coronary heart disease. I'm not sure about low intake in fats, i think it doesn't harm the body as long as the party has enough carbohydrate intake because excess cabohydrate can be converted to fats to be stored in the body. :D
Obesity.
Excessive water intake and excessive caffeine will cause GI distress.