cha_cha_
Likes Dirt
ok, I'll bite in the interest of spreading knowledge
apologies for the wall of text :\
Ketosis is taking this hypothesis just a little bit further.
Despite the current popular science, ketosis is a very natural state for the body to be in and prior to the proliferation of agriculture it is suggested that most everybody survived in a state of ketosis to some degree - there simply wasn't that much sugar around back in the day to keep us out of it... this idea is one of the fundamentals of the paleo diet and lifestyle - most of our modern sources of carbohydrates are only recent additions to our diet (grains, sweet fruits, etc).
Once the "keto-flu" passes, the body progressively becomes more and more "fat-adapted" and it runs better (though some may disagree - there are more pros than cons for me at least).
ketosis works for me, though i would only ever suggest that others explore it and never encourage to take it up on my recommendation alone. there are plenty of changes that need to be understood and factored in if you want to try ketosis (your good and bad cholesterol will rise, you need to drink more water, you need to eat more salt, etc).
I would suggest further reading from a few good authors. good carbs. bad carbs by Gary Taubes is a good place to start, or Gary's website or Peter Attia's website:
http://garytaubes.com/
http://eatingacademy.com
apologies for the wall of text :\
correct. ketosis is when the body is fed less than ~100g of carbohydrates per day and as a result it runs primarily on ketones (broken down fat) rather than glycogen (sugar). Generally speaking, the "insulin hypothesis" goes that the increased accumulation of fat afflicting so many of the modern generation is a result of increased frequency and concentration of blood insulin which is a direct result of high levels of carbohydrate intake. Insulin encourages the accumulation of fat stores and inhibits the burning of fat stores. The hypothesis suggests that by reducing sugar intake we can better control insulin and reverse the damage done.Unless you're on a ketonic diet.
If you want to focus on purely fat burning you can go on a ketonic diet.
Ketosis is taking this hypothesis just a little bit further.
Despite the current popular science, ketosis is a very natural state for the body to be in and prior to the proliferation of agriculture it is suggested that most everybody survived in a state of ketosis to some degree - there simply wasn't that much sugar around back in the day to keep us out of it... this idea is one of the fundamentals of the paleo diet and lifestyle - most of our modern sources of carbohydrates are only recent additions to our diet (grains, sweet fruits, etc).
I have personally never heard of people on ketogenic diets, even very extreme ones, suffering from refeeding syndrome. i HAVE heard of refeeding syndrome from ending particularly long fasts and this is a very real risk, but it has very little to do with a low-carb lifestyle. Many people on ketogenic diets do modified variants such as cyclic (CKD) or targeted (TKD) ketogenic diets whereby they "re-feed" or "carb-up" at set intervals (such as 1 day every week or so) or specifically for workouts. I personally do neither systematically, but i have used "carb-ups" once or twice for race meets.Personally I hate the principal of a ketonic diet and there is a risk of refeeding syndrome when re introducing carbs.
A well trained adult male can carry a few hundred grams of muscle glycogen and a hundred or so grams of liver glycogen. If you restrict carbohydrates and do any sort of physical activity you will deplete these stores over the course of a few days during which time you go through what is often referred to as "keto-flu" or "atkins induction". largely characterised by brain fog and fatigue, the body moves onto gluco-neucleosis where it breaks down any available proteins to make sugars. the brain requires about 100g of glycogen a day and since sugars are in really short supply at this time it really hates this adaption phase. most people have trouble functioning at a normal level during this time.Basically what happens is when your body doesn't receive carbs you will deplete your glycogen stores, these stores tend to last a max of 3 days.
Once this happens your body then needs to use Gluconeogenesis to produce ketones from proteins and fats. Instead of your body running on carbohydrates it now runs on fats and protein in the form of ketones, this is known to increase fat burning.
Once the "keto-flu" passes, the body progressively becomes more and more "fat-adapted" and it runs better (though some may disagree - there are more pros than cons for me at least).
I personally eat about 60g of carbs per day. I have friends who target closer to 30g. both of these carb targets are very much ketogenic. I personally couldn't hack going much lower as the dietary choices would begin to become prohibitive. extreme keto diets (10g/day is about as extreme as it gets) really limit what you can and can't eat.Essentially when you are doing nothing your body is burning fat for fuel not carb's like most people.
The diet basically consists of a very low virtually zero (like 10grams or less) carbs, high to moderate fat and high protein diet helps maintain lean muscle mass.
I personally don't see it as a "diet" as much as i see it as a lifestyle so for me there's no "coming off". Putting weight back on after resuming intake of carbs is pretty much expected and would largely be water retention - glycogen stores require water, carbs and fibre in the gut require water. not sure of the ratios off the top of my head but you would probably require several extra litres of water in your system to keep it happy.There are issue with this diet though and I see it as fairly dangerous approach to dieting, along with the potential of refeeding syndrome there is also potential as you reintroduce carb's to put on a little more weight, so it does have it draw backs.
All of the perceived risks associated with ketosis are totally manageable and in reality it is probably less risky than a conventional western high-carb diet. there are millions of us out here thriving without sugar.Personally I see it as a dangerous diet as do professionals in the field however others continue to use it.
...and neither am i so the same disclaimer applies.Disclaimer: I am not qualified nor a professional so any information you do take is at your own risk.
ketosis works for me, though i would only ever suggest that others explore it and never encourage to take it up on my recommendation alone. there are plenty of changes that need to be understood and factored in if you want to try ketosis (your good and bad cholesterol will rise, you need to drink more water, you need to eat more salt, etc).
I would suggest further reading from a few good authors. good carbs. bad carbs by Gary Taubes is a good place to start, or Gary's website or Peter Attia's website:
http://garytaubes.com/
http://eatingacademy.com