A Although there's great debate on the issue of low-carb diets or low-fat diets, there is no consensus that one specific macronutrient ratio will produce any more weight loss than another. To lose weight, you need to create an energy deficit. Basically take in less calories than your body burns up. This can be accomplished by eating less, or by being more active, or a combination of both. When it come to eating less and restricting calories, The National Institute of Health Obesity Education recommends a 300 to 500 calorie reduction from usual intake for people with a BMI between 27 & 35. For people with a BMI over 35, the recommended reduction is 500 to 1,000 calories.

A. Type "10 lbs" into google, and here's what it fills in based on popular websites:
10 lbs in 10 days
10 lbs in 3 days
10 lbs in 3 weeks
10 lbs in a week!

Although, popular television shows lead us to believe that dramatic weight loss is a reasonable exercise goal, a safe and successful weight loss strategy actually embraces small changes. For the purpose of motivation, it's important that your goals are reasonable & attainable. Also, moderate weight loss definitely represent a more safely achievable goal. Gradual weight loss is more likely to be maintained than rapid weight loss.
The National Academy of Sports Medicine identifies 0.5 to 2 pounds per week as a reasonable rate of weight loss for overweight people, or 10% body weight over a six month period.

To answer the question, is losing 10 lbs in 1 month a reasonable goal:
It depends on what you're starting out at.
- If you weigh 150 lbs & you aren't considered overweight, then the recommendation would be 10% over 6 months
10% of 150 lbs is 15 lbs, so a reasonable goal would be 2.5 lbs a month.
- If you weigh 250 lbs & you're considered overweight, the recommendation of 0.5 to 2 pounds per week puts you between 2 lbs & 8 lbs for the month.

For the average person, 10 pounds in a month is going to be considered extreme weight loss, unless you weigh 600 pounds to begin with. Can it be done? Of course it can. But that doesn't mean it's a reasonable goal. It's rapid weight loss and it will be difficult to maintain, and depending on your weight, it can also be dangerous. If you're starting out at 100 lbs, and you want to lose 10% of your body weight in a month.