biotin and metabolism

so, i've gone from taking 2 biotin a day to 1 ... and my weight has shot up by 4 pounds over 4 days.

yeah, i've eaten a little more than normal, but that was on the weekend (typical) and now it is a thursday.

i know biotin is good for skin and hair, but i also know it promotes metabolism, esp. of carbs. so, has going from 2 to 1 a day caused the increase in weight?

i'm not sure. but i definitely want the boost back if biotin was causing it.