We are about 9 days in on our whole foods plant based diet. We've been vegetarian for 3 years now, but just over the last 9 days have we cut out oil, cheese, soft drinks, sugary drinks, processed food, and all dairy. We are eating every single meal whole food and plant based. We are both about 50 pounds overweight. A major reason why we are doing this is to lose weight and be healthy. Over the last 9 days, I have lost 9 pounds and my wife has gained 1 pound. What?!?!?!?! We are both so confused. We eat the same meals, she just eats a little less than I do. The only difference between my diet and hers is she drinks coffee 2-3 days. That can't be the single reason for this, can it? Please help if you have answers or dealt with something similar.