Can I lose 40 pounds in 3 months?

I've lost 40 pounds in 3 months before, but I advise against it. Making it 40 pounds in 4 months will be better for you. There are a lot of things that can go wrong with your body if you try to lose too much weight too fast. Besides being tough on your internal organs, it can cause you to lose your hair (which may or may NOT grow back!), can leave saggy skin on your body (which will NOT go away) and for some reason a fast weight loss of
ten leads to an even faster weight regain.
your life than to buy nutrisystem or not eat carbs forever. And find an exercise plan that is sustainable as well. You can do something from beachbody or whatever but again doing that for the rest of your life will get boring...join your local parks and rec leagues and play a sport, something that you could enjoy for a long time, or just start walking/jogging/running etc with friends
If you find you're losing weight faster than you should, up your daily calorie intake a little. Do not try to lose weight faster than 2 to 3 pounds a week.