I've been running 20 minutes every day for the past week and have been eating healthy. How long will it be before I notice weight loss? Will I initially gain some "weight" from gaining muscle or not? I haven't weighed myself, I don't want to lose my motivation if I haven't lost anything...

it takes 4-6 weeks to start seeing results because these results occur from your body making adaptations to the exercise your doing and that's just how long it takes the body to adapt. once it has adapted however its important that you make your routine harder in order to continue seeing results as adaptation is counterintuitive to weight loss. add time, add frequency, add intensity, switch up the exercise in general -- doing any of these will help. you might gain some muscle initially but your right to stay away from the scale. instead you might want to track progress with a measuring tape once a month to make sure you are challenging yourself enough to keep weight loss going. measure your chest, bicep, thigh, waist and hips with a tape measure. you should start to see inches coming off when you take your second measure in 4-6 weeks. remember to take your first measure now! over all the best way to tell if you've lost weight is how your clothes are fitting. don't forget to eat in the caloric range for weight loss which is 1400-1800 a day for women and 2200-2700 a day for men. choosing an exact number for yourself will require a little tampering with in the beginning. choose a value and wait a month, if you don't see results go lower by 100. however its not a good idea to go below 1400 and NEVER a good a idea to go below 1200 calories a day. best wishes. :)

I found this on this website.
There are more tips and info.
Today there is too much information available on losing weight that has become more confusing and sometimes difficult to follow. It???s actually very easy to lose weight if you follow my weight loss tips.
* Be in right frame of mind
* Eat whole food
* Eat fresh fruit
* Drink enough water
* Always chew your food
* Take small meals
* Include protein at meal
* Shut off TV while eating
* Increase your physical activity
Go to: http://www.learn-lose-weight-fast.info/i...

You will visibly notice weight loss after losing quite a bit. You will probably notice the benefits and feel healthier before you can see it. Also remember, if you lose weight, that unless you buy smaller clothes your baggy clothes will hide a lot of your loss.
For example, if you weigh 200 pounds you may not see results until you've lost 20-40 pounds.