For some people, though, a keto diet has one big perk: Its high-fat foods leave adherents feeling sated without needing to snack between meals. And while it can be difficult to get all the nutrients and fiber you need without whole grains and fruits, “it is definitely possible,” Sharp says. “You will need to be well in tune with the micronutrients in the foods you’re including in your diet to ensure you’re covering all of your bases. You may also want to consider a supplement.”
Most people will choose to begin their carb-up on Friday night and end it before bed on Saturday. This is usually most convenient as it's when you are off of work and can relax and enjoy the process. If you aren't overly concerned with fat loss and are just using this diet as a way to maintain blood sugar levels, you can likely eat whatever carbohydrate foods you like during this period. If you are worried about fat gain though, then you need the math.

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!