You need to get your body metabolically flexible and accustomed to getting energy from both carbohydrates and fat reserves.
If you don't eat carbohydrates, your body produces glucose in your liver without any problems if you're a healthy person. We're not saying that carbohydrates are bad or that you should stop eating them; we're just clarifying that your body is capable of maintaining the necessary blood glucose levels, even if you don't eat carbohydrates.
For years, we've been sold a nutritional pyramid in which BSA is full of carbohydrates, indicating that they should be our main source of food.
And it's not true. If you're someone who doesn't exercise or move around much, you'll probably be much better off eating very few carbohydrates.
When we eat, the liver stores glucose in the form of glycogen for when we need it.
The liver can convert glycogen into glucose through a process called glycogenolysis. And it can also make glucose if we haven't ingested carbohydrates by collecting amino acids through a process called gluconeogenesis.
The liver can also manufacture ketones, another fuel for the body, when we're low on glucose. Our body stores the sugar it has for those organs that need it, and the liver produces ketones to supplement the limited sugar reserves.
Ketones are used as energy by muscles and other body organs.
The liver is responsible for producing this alternative fuel that comes from fats through a process called ketogenesis. This process begins when hormones signal that there is a low level of insulin in the body and is essential for maintaining minimum glucose levels during periods of fasting.