These stores are lost from your muscles and liver. Usually, with depleted glycogen, comes dehydration. Dehydration is "the removal of water from an object" (www.wikipedia.org). Dehydration is a huge factor in the initial weight loss. The formation of glycogen is called glycogenesis. This process is only successful when an adequate amount of carbohydrates is consumed. A low-carb diet does not support this process. The glycogenesis process occurs when gylcogen is broken down to form glucose, which is then used as fuel. The depletion of muscle glycogen causes the body to fatigue quicker, which in turn will make exercise and daily movements uncomfortable.

OTHER NEGATIVES
Basically, your body needs carbs. Carbohydrates give you energy (fuel), they play a significant role for many vital organs like the kidneys, the central nervous system and the brain. That being said, low carb diets make you lose weight because they restrict calories. The old theory is still in play. Calories in, calories out. If you are taking in less calories than you are expending, you lose weight. Simple enough? Good! Looking at the cons, when your body is neglected carbs for a certain period of time, your body starts to produce ketones. "These ketones are the leftovers from fats broken down in the body. With enough production of ketones the body starts to "store fat" (www.diet.myfit.ca) , a process known as ketosis. In plan terms, the same chemical reaction that made you lose the weight, eventually makes
you gain it back.

Also, if you are exercising, but not eating carbohydrates (which most people would be exercising if they're trying to lose weight), you end up taking the chance of changing your body's hormone that regulates metabolism. The hormone is known as T3. T3 is a great hormone for weight-loss, however low-carb diets usually reduce this hormone. Another thing, when your body is low-carb for too long, you can increase insulin sensitivity. Increased insulin sensitivity means that your body is more likely to store fat.

WHAT YOU CAN DO
What you can do is eat more natural and unrefined foods, they are generally better for your body. Choose whole grain carbs that have a low or medium glycemic index. Increase your fruits and vegetables, which are good carbs and help you consume important vitamins, minerals and fiber.
Eat 40-60% of your calories from carbs, keeping in mind that you're choosing the right ones. You don't need to restrict necessary foods to lose weight. You need to pick proper foods choices, eat proper portions sizes and eat at the proper times throughout the day. Forget what you've heard, start now and change your eating habits for the rest of your life!