The thing about cold thermogenesis is that it is an acute stress on your body. If you are in healthy state and your stress tolerance is pretty high, it can be effective for weight loss to an extent. I have used it in the past and it worked well in conjunction with a fat loss diet. I no longer do it because I feel there are a lot of negative health benefits to conscientiously adding certain acute stressors back into my life (I'd much rather stick to exercise as my main one.) Not only is the prolonged cold a physiological stress, but the idea of knowing that I'm going to be taking a cold shower or ice bath adds of a ton on emotional stress as well. Just a few thoughts based on my experiences.