YMMV, but yes, with full supplies it usually takes about 3 days to deplete sugars and switch to fat.
If you're not used to keto, switching may be physiologically hard. Gradually transitioning from carbs to fat, and then or later to fasting may be easier on the body, though a prolonged hardship for the mind.
Once you get used to it, switching is a normal thing to do, though again YMMV.
If you're not used to keto, switching may be physiologically hard. Gradually transitioning from carbs to fat, and then or later to fasting may be easier on the body, though a prolonged hardship for the mind.
Once you get used to it, switching is a normal thing to do, though again YMMV.