Zevia energy drinks are sweetened with Stevia and include no calories. Be sure to pick whole milk for the higher fat content and measure how much you drink. A single cup of whole milk has almost 12 grams of carbohydrates, which takes up nearly half of some dieters' daily carb allowance. One scoop of Perfect Keto protein powder ($37.04, buy it here) has only a single gram of carbs. Hardcore keto followers may want to avoid happy hour altogether, as alcohol "stops fat loss dead in its tracks," Israetel says.