If you're significantly overweight is it ok to lose weight quickly (like a low carb) or should you try for the conventional 1-2 pounds a week. i am 5'0 and weigh 254 pounds. i'm fortunant to not have any medical problems and i go regularly for physicals

Life long habits: Losing weight is the "easy" part. (not easy at all, of course). The hard part is keeping it off. Therefore, losing weight quickly will not accomplish your goal. Instead, change your habits to focus on pleasurable activities independent of meals and eat in a manner that is sustainable. That means slow weight loss. You should not attempt to lose 100 lbs in anything less than 24 months.

Doctor supervised: Please discuss with your doctor. This depends on your health history and other factors. Generally, slow and steady works best though you may lose weight more quickly when you start the process. It is most important to have a healthy diet which you'll incorporate into your changing lifestyle. Fad diets don't work. People gain weight back.