text: why is it impossible to lose weight? i eat 1500 calories a day, a lot of which is fruit and vegetables and it's quite low carb.  i don't touch junk food, sweets (apart from fruit) or alcohol except for special occasions.  i even tried 800 calories a day for a couple months.  i get at the very least an hour of aerobics in each day and i go everywhere on foot.  a year of this and i'm still 20 lbs overweight, haven't lost a thing.  i went to three doctors.  i came out negative for hypothyroidism, so they pretty much just told me to keep doing what i'm doing, even though it's not working.  what can i do? i feel horrible, uncomfortable and so incredibly ugly. drink at least 4 liters of water a day, make sure that your getting about 8 hours of sleep a night.  go in for a massage every other month or so to relax your muscles cause every single day exercising isn't good for them, you want to have at least a day off a week.  that should help you, if it doesn't join a gym and talk to a trainer, they may be able to help you cause you can give them more detail then you did us, like how strenuous your exercise is.  keep in mind you maybe building muscle as fast as your losing fat.