Scales??? Does the Body Fat and Hydration options work?

[r3ngels]

I was looking at scales this week and I saw a lot that measure body fat and hydration. Does anyone know if those functions really work? And how I really can't imagine how the scale would know if I am dehydrated?

And thoughts? I have been excercise a lot lately and the scale isn't moving and a friend told me I am losing body fat and gaining muscle... would love it if that were true.

 

[Raenstoirm]

My nutritionist uses them all the time and suggested I buy one (so I did). They thing to remember though is the level of hydration. If you dehydrated or over hydrated your body-fat percentage will be off.