Walking into Sweatheory and off the bustling Hollywood sidewalk where models, the homeless, grimy streets and clean sunshine collide, you will feel like you’ve been transported to a sweat lodge oasis deep in the Scandinavian forest, albeit one with chic merch, far infrared saunas, vitamin IV shots and drips, and fat blasting ultrasonic caviation treatments. Just about everything the LA fashion bloggers, Jetset and regular-ole moms like myself need to prepare for summer. So when the co-founder, Oliva, invited me in to experience Sweatheory’s weight-loss trio (‘B Skinny+’ vitamin shot, a 30-min ‘Body Sculpt’ fat blasting treatment and 1-hour infrared sauna sweat…