If you have decided you want to lower your bodyfat and have decided that you will employ a low carb diet you are in for a handful of challenges. If you have done a low carb diet in the past you will already know about a few of the battles you will be up against.
First of all, when you first start, you will feel very lethargic. This is normal as your body is used to using carbohydrates as your main energy source. Try to fill up on vegetables like broccoli, cucumbers and lettuce during this phase. Also try adding some flax seed oil to your diet, the added fats will help hormone production. Once you get past the first week, your body should adapt and you should feel much more energetic.
The next issue you will probably face is lack of satiation when eating. You will eat your meals and chances are you will still be hungry after; most likely for something sweet. After a few weeks, you will also notice this subside, but there are a few things you can do. To eliminate that hungry feeling, try drinking four litres/quarts of water over the course of the day. The water will help keep you feeling a little more full. Another good trick is to drink a cup of coffee between meals. The caffeine in the coffee helps to supress your appetite and helps prevent you from wanting food. (Just make sure to avoid adding sugar)
The last hurdle I tend to find myself experiencing when reducing my carbohydrate intake is extreme sugar cravings. While this isn't the easiest one to battle there are some options out there. If you aren't opposed to using artificial sweeteners there are lots of drinks you can get to help curb your cravings. To help trick your body into thinking you are eating sugar, grab a diet soda or a sugar free popsicle; it will taste like you are eating sugar and will usually help kill your craving.
These are just a few of the hurdles you may run into while running a low carb diet. There are many challenges but the results after a few months can not be approached by any other conventional diet.
Good luck with your new diet.