About the same time as not using the Atkins diet and eating more fruit and veggies and less fats, whole milks and white flours. That is as long as you still exercise 5 times a day for no less then 20 min and you have to sweat. Healthy weight loss all depends on you and your body. ------------- Here is a bit from the link below, may help. No matter what the reason, successful weight loss and healthy weight management depend on sensible goals and expectations. If you set sensible goals for yourself, chances are you'll be more likely to meet them and have a better chance of keeping the weight off. In fact, losing even five to 10 percent of your weight is the kind of goal that can help improve your health. Most overweight people should lose weight gradually. For safe and healthy weight loss, try not to exceed a rate of two pounds per week. Sometimes, people with serious health problems associated with obesity may have legitimate reasons for losing weight rapidly. If so, a physician's supervision is required. What you weigh is the result of several factors: how much and what kinds of food you eat whether your lifestyle includes regular physical activity whether you use food to respond to stress and other situations in your life your physiologic and genetic make-up your age and health status. http://www.consumer.gov/weightloss/setgoals.htm

Be careful. Very rapid weight loss may lead to high doses of fat-soluble toxins to be released from your burning fat reserves, causing illness, lethargy, even retarding weight loss.