But it's deep in the noise, 150g is a tiny amount of difference in how much water you drank before you left that morning. It's like when people say they 'lost

But it's deep in the noise, 150g is a tiny amount of difference in how much water you drank before you left that morning. It's like when people say they 'lost half a pound', no, you just went to the loo. Or you had one less coffee today. It's not significant.