Once inside the mitochondrion, the dominant way that the bound fatty acids are used as fuel in cells is through β-oxidation, which cleaves two carbons off of the acyl-CoA molecule in every cycle to form acetyl-CoA.[24] Acetyl-CoA enters the citric acid cycle, where it undergoes an aldol condensation with oxaloacetate to form citric acid; citric acid then enters the tricarboxylic acid cycle (TCA), which harvests a very high energy yield per carbon in the original fatty acid.[25][26]
Consume more beef and high-fat dairy. These keto foods contain high amounts of a fatty acid called Conjugated Linoleic Acid (CLA). CLA has been found to improve fat loss by a variety of different mechanisms. To get as much CLA as possible, source your dairy and beef from 100% grass-fed cows. CLA content is 300-500% higher in beef and dairy from grass-fed cows, compared to grain-fed cows.
I’ve been trying this keto diet that my dr.and daughter recommended, it’s been close to a week. I’ve changed my food intake, no bad carbs that I know of, was a huge chip addict stopped all that with no cravings. I’m not seeing any results I’m getting discouraged and everything sounds so complicated watching this, measuring that, I don’t have a clue what I’m doing. just that I stopped bread,pasta,poratoes,rice all those kind of carbs.I’m drinking more water eating green vegetables and trying to increase my fat intake. I don’t feel motivated to exercise which probably doesn’t help and have 100-130 to lose. I need help I don’t understand or have the time create a lot of meals and measure my fat,protein and carb intake.
In sheep, ketosis, evidenced by hyperketonemia with beta-hydroxybutyrate in blood over 0.7 mmol/L, occurs in pregnancy toxemia.[78][79] This may develop in late pregnancy in ewes bearing multiple fetuses,[78][79] and is associated with the considerable glucose demands of the conceptuses.[80][81] In ruminants, because most glucose in the digestive tract is metabolized by rumen organisms, glucose must be supplied by gluconeogenesis,[82] for which propionate (produced by rumen bacteria and absorbed across the rumen wall) is normally the principal substrate in sheep, with other gluconeogenic substrates increasing in importance when glucose demand is high or propionate is limited.[83][84] Pregnancy toxemia is most likely to occur in late pregnancy because most fetal growth (and hence most glucose demand) occurs in the final weeks of gestation; it may be triggered by insufficient feed energy intake (anorexia due to weather conditions, stress or other causes),[79] necessitating reliance on hydrolysis of stored triglyceride, with the glycerol moiety being used in gluconeogenesis and the fatty acid moieties being subject to oxidation, producing ketone bodies.[78] Among ewes with pregnancy toxemia, beta-hydroxybutyrate in blood tends to be higher in those that die than in survivors.[85] Prompt recovery may occur with natural parturition, Caesarean section or induced abortion. Prevention (through appropriate feeding and other management) is more effective than treatment of advanced stages of ovine ketosis.[86]
Ketone esters: These are the raw ketones (in this case, beta-hydroxybutryate) that are not bound to any other compound. These exogenous ketones can be utilized quicker and potentially have a better effect at raising blood ketone levels as your body doesn’t have to cleave the BHB from any other compound. The downside? They typically have a foul taste and can cause an upset stomach.
I see a lot of people say that ketosis is great for insulin sensitivity. BUT, in my experience ketosis causes physiological insulin resistance whereby the muscles and liver are sparing glucose for the brain. Hence, glucose tolerance actually goes down during ketosis. As such, is it possible that post workout carbs could do a lot more damage than they would on a non-ketogenic diet? Or maybe, as Kiefer suggests, glucose uptake post workout is not moderated by insulin at all i.e. muscles soak up glucose regardless of their insulin sensitivity? Or maybe cyclical ketosis doesn’t allow liver glycogen to get low enough to trigger physiological insulin resistance?
Remember the low-fat diet craze? Back in the 1990s, we were told that swapping regular cookies and chips for those labeled "low fat" would be the ticket to easy weight loss and better health. Today, it's the opposite—a low-carb, high-fat eating plan called the ketogenic diet, or keto diet for short, is getting all the buzz. Celebrities like Halle Berry, Kim Kardashian, and Megan Fox are fans; more than 7 million Instagram posts have been tagged #keto; and upwards of 1 million people search "keto diet" on Google every month.
Doctors at the Mayo Clinic created a formula that manipulated the ketogenic effect that came with complete fasting by instead limiting a patient’s intake of carbohydrates. This was the genesis of the ketogenic diet. To manage childhood epilepsy, the prescribed diet consisted of one gram of protein per kilogram of body mass — a max of 15 grams of carbs — and the rest of the calories from fat. Et voila: the ketogenic diet was born.
Type II diabetics can reduce their risk of developing these complications by keeping blood glucose levels within a healthy range (4.5 - 6.5 mM). This can be achieved using insulin injections, but using insulin is not without side effects (i.e hypoglycemia requiring assistance and weight gain)101. Therefore dietary carbohydrate restriction is likely to be a good lifestyle change to help with diabetes management,. Companies such as Virta Health are popularising this approach to diabetes management and pioneering the use of technology to improve compliance. The benefits of carbohydrate restriction include:
Under normal functioning, leptin enters the bloodstream via your circulatory system and then binds to protein in the blood. When it reaches your brain capillaries, it travels across the blood-brain barrier (BBB), binding to leptin receptors on the hypothalamus portion of your brain. Leptin then clues your brain into the fact that you’re full.[4][5]
Day 2: There's a bagel shop less than a block from my office. I pass it every single day and never really think anything of it. Well, not today! The smell of the freshly baked everything bagels—and was that veggie cream cheese I smelled?—was wafting out the door as I walked by extra quickly. (Though I found out later that there is a way to have bread and still stay in ketosis.) 
Ketosis is really a shortening of the term lipolysis/ketosis. Lipolysis simply means that you're burning your fat stores and using them as the source of fuel they were meant to be. The by-products of burning fat are ketones, so ketosis is a secondary process of lipolysis. When your body releases ketones in your urine, it is chemical proof that you're consuming your own stored fat. And the more ketones you release, the more fat you have dissolved.
Ken, not 100% sure I understand your question but if you're asking if you should take any more supplements through out the week, it's hard to know without getting some blood testing done. If you want to go into detail, book a consult at bengreenfieldfitness.com/coaching and choose 20 or 60 mins and we'll get you scheduled. If you want to know specifically about fueling for your runs, have a read through this: https://bengreenfieldfitness.com/2013/07/what-…

Easy: use about half of the recommended serving of Glycofuse, and instead add one scoop of Catalyte electrolytes, one scoop of Kion Aminos, and one serving of ketones and/or MCT’s in the form of Brain Octane, KetoCaNa or KETO//OS (pick your poison, it’s up to you). While any of these forms of ketones and/or MCT’s works for daily focus and short workouts, I found that for long workouts they aren’t very gut friendly unless you really spread out the dosage (e.g. one serving every three hours), so you’d only really use that stuff in something like, say, an Ironman triathlon or multi-day adventure race.
It is interesting to note that the KB are capable of producing more energy than glucose due to the changes in mitochondrial ATP production induced by KB (Kashiwaya et al., 1994; Sato et al., 1995; Veech, 2004). During fasting or KD glycaemia, though reduced, remains within physiological levels (Seyfried and Mukherjee, 2005; Paoli et al., 2011). This euglycemic response to extreme conditions comes from two main sources: glucogenic amino acids and glycerol liberated via lysis from triglycerides (Vazquez and Kazi, 1994; Veldhorst et al., 2009). Glucogenic amino acids (neoglucogenesis from amino acids) are more important during the earlier phases of KD, while the glycerol becomes fundamental as the days go by. Thus, the glucose derived from glycerol (released from triglyceride hydrolysis) rises from 16% during a KD to 60% after a few days of complete fasting (Vazquez and Kazi, 1994). According to Bortz (1972) 38% of the new glucose formed from protein and glycerol is derived from glycerol in the lean while 79% in the obese (Bortz et al., 1972). It is important to note that during physiological ketosis (fast or very low calorie ketogenic diets) ketonemia reaches maximum levels of 7–8 mmol/L with no change in blood pH, while in uncontrolled diabetic ketoacidosis blood concentration of KBs can exceed 20 mmol/L with a consequent lowering of blood pH (Robinson and Williamson, 1980; Cahill, 2006) (Table ​(Table11).
Jump up ^ Freeman JM, Vining EP, Pillas DJ, Pyzik PL, Casey JC, Kelly LM. The efficacy of the ketogenic diet—1998: a prospective evaluation of intervention in 150 children. Pediatrics. 1998 Dec;102(6):1358–63. doi:10.1542/peds.102.6.1358. PMID 9832569. https://web.archive.org/web/20040629224858/http://www.hopkinsmedicine.org/press/1998/DECEMBER/981207.HTM Lay summary]—JHMI Office of Communications and Public Affairs. Updated 7 December 1998. Cited 6 March 2008.
Obesity means that someone has an excess amount of fat to the extent that it harms your health. Oftentimes, doctors, nurses, and other professionals will put your weight in terms of your height and gender in a figure called body mass index (BMI). According to the World Health Organization, a BMI from 25-30 usually indicates someone is overweight, BMI in the 30-35 range puts someone in the range of being obese and 35 and over morbidly obese. [1]
On a ketogenic diet, your entire body switches its fuel supply to run mostly on fat, burning fat 24-7. Insulin levels become very low, and fat burning increases dramatically. It becomes easy to access your fat stores to burn them off. This is great if you’re trying to lose weight, but there are also other less obvious benefits, such as less hunger and a steady supply of energy, keeping you alert and focused.
Thanks for sharing this information and your experience. I started Keto because I was having severe digestive issues where nearly everything seemed to make my tummy hurt. I saw that alot of the recipes and choices were gluten free since low carb, so I figured I’d try it and hopef5find some foods I COULD eat! I did strict for the first few weeks til I could see how it worked out and did find great relief in that there was nearly ZERO pain and bloating. Now I don’t do KETO, but I continue to substitute alot in the same manner… and I cook breads made with almond and coconut flour especially. I keep low sugar intake, but not nearly zero, and I try to keep within healthier carbs so no more pasta for instance, but maybe a little rice or sweet potatoes etc. I did start having hormone symptoms when doing strict keto and getting very tired also. I lost about 14 lbs right off then gained back about 5. I am starting to feel like I’m finding a good balance that works for me now, and I am thankful to have opened up some new nutrition ideas that my body seems to like better! I will say, I joined one fb group for KETOers, but found it to be very stressful as lots of snotty comments and attitudes… maybe isn’t that way in the entire KETO community, but was very off-putting! Through the years, I hold to my same theory on health and wellness : LISTEN TO YOUR BODY!
"I'll typically have two chocolate peanut butter fat bombs. They save me. Lately, there’s been a keto cheesecake in the fridge and I’ll sneak a bite, but won’t have a whole piece. I try not to go too hard on the snacks anymore. I’m noticing that laying off the almond flours, coconut flours, and baked sweets has helped me feel better overall. If I want a crunch I’m reaching for the pork cracklings."

Glucose-sensitive neurons have been identified in a number of CNS regions including the metabolic control centers of the hypothalamus. Medeiros et. al. have used patch-clamp electrophysiology to examine whether neurons in a specific specialized region known as the subfornical organ (SFO), an area where the blood-brain barrier is not present, are also glucose sensitive or not. These experiments demonstrated that SFO neurons are glucose-responsive and that SFO is an important sensor and integrative center of circulating signals of energy status (Medeiros et al., 2012).


2) I have a hard time eating real food soon after rides/workouts. I had used Hammer Recoverite (1scoop instead of suggest serving of 2 and add 1scoop whey isolate protein) in the past because I feel a significant difference the day after with less muscle fatigue. Then I read a previous posts on your opinion of post-workout supplementation ( https://bengreenfieldfitness.com/2013/07/what-to-… ) and I realized the primary ingredient in Recoverite is maltodextrin. Since the 2013 article, has anything changed in your research that you might suggest I add PWO to aid in the muscle fatigue/recovery? (In other words, Is there anything more healthy I can take to replace the Recoverite or should the aminos/electrolytes/carbs/MCT’s from the recipe in this article be sufficient?) Thanks in advance, I appreciate all of your work!
The state of ketosis occurs when ketone bodies, which are actually three biochemicals -- acetone, acetoacetic acid and beta-hydroxybutyric acid -- build up in your bloodstream. Your body needs carbohydrates to fully break down fat, so a lack of carbohydrates in your diet leads to ketosis. It is normal for the body to produce small amounts of ketone bodies, but when placed in a state of starvation, the liver produces ketone bodies from fatty acids to nourish essential organs like the brain and heart. The excess acetone is excreted in the urine and producing the characteristic sweet breath often found in diabetics
In some cases epilepsy cannot be treated successfully using anticonvulsant medications. In some cases where drugs have failed, the ketogenic diet has been widely documented to deliver transformative seizure control, reducing frequency by anywhere between 40-90%43. Whilst the exact mechanisms underlying the beneficial effect of the ketogenic diet are unclear, the hypothesised mechanisms include:
On the ketogenic diet, carbohydrates are restricted and so cannot provide for all the metabolic needs of the body. Instead, fatty acids are used as the major source of fuel. These are used through fatty-acid oxidation in the cell's mitochondria (the energy-producing parts of the cell). Humans can convert some amino acids into glucose by a process called gluconeogenesis, but cannot do this by using fatty acids.[56] Since amino acids are needed to make proteins, which are essential for growth and repair of body tissues, these cannot be used only to produce glucose. This could pose a problem for the brain, since it is normally fuelled solely by glucose, and most fatty acids do not cross the blood–brain barrier. However, the liver can use long-chain fatty acids to synthesise the three ketone bodies β-hydroxybutyrate, acetoacetate and acetone. These ketone bodies enter the brain and partially substitute for blood glucose as a source of energy.[55]

He is convinced that carbohydrate-heavy, low-fat diets are a major reason we're seeing high rates of diabetes, high blood pressure, obesity, and cancer. That's because a diet high in sugar can quickly raise insulin levels in the body. Over time, those spikes can lead to insulin resistance and eventually to long-term health issues like high blood pressure, Type 2 diabetes, inflammation, and obesity.
The brain is composed of a network of neurons that transmit signals by propagating nerve impulses. The propagation of this impulse from one neuron to another is typically controlled by neurotransmitters, though there are also electrical pathways between some neurons. Neurotransmitters can inhibit impulse firing (primarily done by γ-aminobutyric acid, or GABA) or they can excite the neuron into firing (primarily done by glutamate). A neuron that releases inhibitory neurotransmitters from its terminals is called an inhibitory neuron, while one that releases excitatory neurotransmitters is an excitatory neuron. When the normal balance between inhibition and excitation is significantly disrupted in all or part of the brain, a seizure can occur. The GABA system is an important target for anticonvulsant drugs, since seizures may be discouraged by increasing GABA synthesis, decreasing its breakdown, or enhancing its effect on neurons.[7]
An increase in fat burning ability could decrease the efficiency of exercise: one adaptation to a high fat diet is an increase in a process called mitochondrial uncoupling. This means that some of the stored energy from metabolic substrates is not used to generate ATP but is ‘dissipated’ leading to a decrease in efficiency of energy production 26 ,19.  
The first cellular fuel is glucose, which is commonly known as blood sugar. Glucose is a product of the starches and sugars (carbohydrates) and protein in our diet. This fuel system is necessary, but it has a limitation.  The human body can only store about 1000-1600 calories of glucose in the form of glycogen in our muscles and liver. The amounts stored depend on how much muscle mass is available.  Men will be able to store more because they have a greater muscle mass.  Since most people use up about 2000 calories a day just being and doing normal stuff, you can see that if the human body depended on only sugar to fuel itself, and food weren’t available for more than a day, the body would run out of energy. Not good for continuing life.
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