Is it possible for using an electric blanket to cause weight gain?

Not a bit: indeed, if you sweat from it, the loss of fluid will cause a minor, temporary weight loss if interested in weight loss seriously consider http://www.amazon.com/dp/0692496157/

Who knows ? : ? about the effect of electric blankets on physiological function. Unfortunately, there is good science that low power vibrating electromagnetic waves can be causal of tissue injury and behavioral disorders. Pending further data, electric blankets are not to be advised. Similarly, avoid synthetics and stay with cotton and wool. Your electromagnetic body energy field will be grateful.