There is no metabolic pathway that converts lipids to glucose. Your body will not be able to metabolize glucose from your diet if you're eating only fats.
The metabolic pathways which do produce glucose are:
1) Eat starches.
2) Eat protein.
Starches are converted directly to glucose. Protein can be converted to glucose by a process called gluconeogensis. This is what happens under either a starvation situation (in which case the protein is supplied from body tissues -- skeletal muscle and eventually organ tissue), or under a ketogenic diet, in which dietary protein could be utilized.
While dietary glucose is apparently not necessary, it's also not a bad thing, provided you're not getting excessive quantities or low-fiber sources which trigger an excessive insulin response.
That said: the typical Western diet provides more than ample glucose and starches, often in an overly refined form. That can trigger lipogenesis, in which excessive glucose is converted to lipids and stored as fat.
There may exist such a pathway, but we need to check its capacity, efficiency and by-product production. Maybe it is a pathway for critical situations only and we should not relay on it for prolonged periods of time.
Maybe the carbohydrate to glucose pathway is for critical situations only and we should not relay on it for prolonged periods of time.
These are evolutionary adaptions that let us extract energy efficiently from our environment, maybe yesterday's sensationalist news about our alcohol dehydrogenase efficiency is proof that we should use alcohol for all energy needs.
I've the heard the pathway is gluconeogenesis[1] . From what I've read we need roughly 100g of carbs a day, and we can create all of it via gluconeogenesis.
Now, what i really wonder is; if we see diabetes from abusing the carbohydrate pathways, then what disease comes from abusing the ketone/gluconeogensis pathways ?
The metabolic pathways which do produce glucose are:
1) Eat starches.
2) Eat protein.
Starches are converted directly to glucose. Protein can be converted to glucose by a process called gluconeogensis. This is what happens under either a starvation situation (in which case the protein is supplied from body tissues -- skeletal muscle and eventually organ tissue), or under a ketogenic diet, in which dietary protein could be utilized.
While dietary glucose is apparently not necessary, it's also not a bad thing, provided you're not getting excessive quantities or low-fiber sources which trigger an excessive insulin response.
That said: the typical Western diet provides more than ample glucose and starches, often in an overly refined form. That can trigger lipogenesis, in which excessive glucose is converted to lipids and stored as fat.