Risks

A sudden and drastic reduction in carbs can cause temporary side effects, such as:

• Constipation
• Headache
• Muscle cramps

Severe carb restriction can cause your body to break fat down into ketones for energy. This is called ketosis. Ketosis can cause side effects such as bad breath, headache, fatigue and weakness.

It's not clear what kind of possible long-term health risks a low-carb diet may pose. Restricting carbs in the long term they may result in vitamin or mineral deficiencies and gastrointestinal disturbances.

Some health experts believe that if you eat large amounts of fat and protein from animal sources, your risk of heart disease or certain cancers may actually increase.

If you opt to follow a low-carb diet, pay attention to the fats and proteins you choose. Limit foods with saturated and trans fats, such as meat and high-fat dairy products, which may increase your risk for heart disease.