IS it normal to lose weight fast when?

you first start your diet? I am 60 pounds overweight. I am trying to lose 3-4 pounds a week. The next 4 weeks, I want to lose 12-15 pounds. I am eating healthy smaller portions, fruits and veggies and working out. lots of water. Working out 5-6 times a week. I have lost 8 pounds so far in first two weeks.
IS it normal to lose weight fast when?
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