Lol. I have very long hair and even had my husband hold it up once. You would be *amazed* how much really long hairs weighs!

Seriously, though, first thing in the morning, because thats when we weigh our least. While you sleep, your body is busy at work repairing and building muscles, metabolism is in high speed. You aren't adding water and meals while you sleep, and should be the longest time you go per day without intake.

HTH