The cold plunge trend is popular now. And it has many health benefits, one being weight loss. Here’s why. Brown fat. Nobody likes to talk about their fat. Well, at least your white fat. Now brown fat, well, we can talk about that and even brag about it. It’s the “good fat.” What is brown fat? Brown fat (yes, it is indeed brown) is not some blob of material that only stores extra energy for you. It is an active fat. It plays a big role…