Unfortunately, Sharp says that type of weight loss is not sustainable. “It’s largely water weight,” she says. “We store about six grams of water for every gram of carbohydrate, so when our carb stores are depleted, we drop a ton of water weight at once.” And if it’s increased energy you’re after, studies of cyclists and professional gymnasts have found no significant change to performance or muscle mass over several months of a ketogenic diet.
While macros will differ a little from person to person, the general rule of thumb for keto is to keep carbohydrates under 5% of your daily caloric intake. As long as you avoid the foods mentioned above, you should be fine. Google “TDEE calculator” if you need some additional guidance on how many calories to eat. I’ve had success following this way of eating as it allows me to eat foods that taste great. There are tons of resources online as well if you need additional guidance. A quick google search should turn up a ton of resources. Hope this helps!