There are different levels of ketosis, depending on your daily carbohydrate intake:
- @ 0g: your brain is burning about 25g of glucose, all of which is manufactured from gluconeogensis, with the rest of its energy coming from ketones (most of your other cells are fuelled by free fatty acids)
- @ 25g your brain is burning
about 25g of glucose, which comes
from dietary carbohydrate with the
rest of it's energy coming from
ketones (most of your other cells are
fuelled by free fatty acids).(most of
your other cells are fuelled by free
- @100g+ your brain in
burning 100g of glucose which comes
from dietart carbohydrate, with any
excess being stored (and used) in
your muscles and liver.
So technically, if you are eating less than 100g of carb a day, you are in ketosis to some degree.
The difficult area is what happens in the 25g to 100g range where your brain is burning some glucose and some ketones.
When people talk about being "kicked out of ketosis", I think they usually mean "no longer show any purple on ketostix", which usually occurs for most people if they eat more than 30-50g a day.
I personally aim for about 30g, because it seems closer to a physical limit (25g) than 50g, which just seems a bit arbitrary.