I’ve always heard that the brain functions well on ketones. Gluconeogenisis typically reduces ketosis, though as well? This is the first time I’ve heard anyone say the brain can’t use anything but glucose. I know there’s *preferred* sources of fuel over others, but I was also fairly certain other sources were fine.. or humans might be in a bit of trouble.
When carbs go missing from a person's diet, the body uses up its glucose reserves and then breaks down stored fat into fatty acids, which, when they reach the liver, are converted into an organic substance called ketones. The brain and other organs feed on ketones in a process called ketosis, which gives the diet its name. Keto dieters eat lots of fat to maintain this state.
Each of the above methods is good for its own reason; however, we would suggest only one: the blood test.  The urine strips are cheap, yet not accurate.  The breath analyzer is expensive, difficult to find and has definite quirks.  The blood tests, while somewhat expensive, are fully reliable and testing your blood - the most accurate place to measure your ketones.
Totally agree that it’s not something for everyone, though. Even one of the authors I read said he sometimes sneaks a french fry or a bite of cheesecake/ice cream, though he’s able to stop after just a little bit and it doesn’t throw him off horribly. Of course, that’s not license to eat junk all the time, but it does mean that once you’re well-adapted, you can sometimes indulge.

Starting off with it, but with the ~ 50g carbs/day. I’ve been using MyFitnessPal to track, using some advice from ketovale and others to set the targets in the service to help. Only been doing it for ~ 10 days, but down about 8 pounds so far. My biggest problem – need more veggies in my diet and that’s a bit tougher. Working on that with salads and such. I also need to purge out the older salad dressings made w/ vegetable oils and such, but getting there. So – not fully into Keto, but working towards that. I’ve definitely found that I can eat quite a few foods I actually like so that’s not a huge downside. Do I miss pizza/pasta/tortillas? Sometimes. But there are keto pizza crusts (of a sort) and spaghetti squash works really well for me to replace pasta. I have yet to try a “zucchini” wrapped enchilada, but I think that might work as well.


Some people also experience a change in bathroom habits. Moving your bowels can be difficult with a dramatic change in diet, and can be helped by choosing specific foods over others. Cheese is well known to stop up the works, so reducing cheese can help. Making sure to include plenty of fibrous vegetables can also keep things moving, so make sure to get lots of leafy greens, celery, and other veggies. In addition, make sure to drink enough water. Water not only keeps you hydrated, but also helps keep the bowels moving.
If you’d like to try intermittent fasting, it’s best to start by gradually decreasing your feeding window. Start with not eating for a 12 hour stretch, including the time that you’re sleeping. For example, you could stop eating at 8 in the evening, then have breakfast at 8 in the morning. Ultimately, you’ll want to be mostly done with digestion by the time you go to bed, and not be hungry until late morning, so for most people a feeding window of 10am to 6pm would be a good goal.
[iv] Hussein M Dashti, MD PhD FICS FACS, Thazhumpal C Mathew, MSc PhD FRCPath, Talib Hussein, MB ChB, Sami K Asfar, MB ChB MD FRCSEd FACS, Abdulla Behbahani, MB ChB FRCS FACSI PhD FICS FACS, Mousa A Khoursheed, MB ChB FRCS FICS, Hilal M Al-Sayer, MD PhD FICS FACS, Yousef Y Bo-Abbas, MD FRCPC, and Naji S Al-Zaid, BSc PhD. "Long-term effects of a ketogenic diet in obese patients"

Con: Results can vary depending on how much fluid you drink. By drinking more water, you dilute the concentration of ketones in the urine and thus a lower level of ketones will be detected on the strips. The strips don’t show a precise ketone level. Finally, and most importantly, as you become increasingly keto-adapted and your body reabsorbs ketones from the urine, urine strips may become unreliable, even if you’re in ketosis.
Note: Are you a vegetarian or vegan and want to go on a ketogenic diet? It’s still possible! Just keep in mind that the dietary restrictions can sometimes be a little bit intense. Make sure to plan ahead and prepare to aid your success. To help out, we’ve published articles (with 7 day meal plans included) for both the vegetarian ketogenic diet and the vegan ketogenic diet.
Many people also experience cramping, notably in the feet and legs. Because of this, you’ll want to consume extra electrolytes any time you are on a ketogenic plan. People who suffer with these symptoms refer to them as the Keto-Flu, and while it isn’t like the real flu, the symptoms can knock you down until you get your electrolytes back in balance.
I will admit to appeal to authority here. This was said by the professor of the course I mentioned in my previous post, but it was also confirmed by many of my classmates, whom, at this point(for reasons, which are too tedious and long winded to extrapolate on atm), I consider smart enough to know their business, that I choose to believe them. All of them. If nothing else, the professor himself is,well… authority on his field.

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