Macro effect in Body Weight Simulator

yarwell

Having a play with http://bwsimulator.niddk.nih.gov/ i noticed a "carbs" entry box. I set it up to eat maintenance calories for 90 days with 50% from carbs, then dropped to 10% carbs for 90 days, then back to 50%.

The effect was a weight loss of 4.2 lbs - 4.5 of fat free mass (mainly water ??) offset by a 0.3 lb fat gain. When it returned to high carbs the weight back up to the original condition.

Pity we can't play with other macros too.