I think people are conflating "weight" with "fat". It's very believable to me that they lost 15lbs in 10 days, some fat, probably mostly water. I know my weigh

I think people are conflating "weight" with "fat". It's very believable to me that they lost 15lbs in 10 days, some fat, probably mostly water. I know my weight can fluctuate as much as 10lbs in a day depending on how much I've been sweating, eating, drinking, exercising over the course of the day.