There are two major ways fasting is beneficial for overall health. First, it gives the body a break from digestion. Digestion is a surprisingly stressful activity, and if there is a longer period of time where your body can focus on simply using the nutrients it’s been given already without having to handle more, digestion tends to improve, as well as energy levels.
Increasing numbers of people around the world are suffering from chronic diseases such as diabetes and obesity, and the main culprit is usually the food they eat. The standard American diet, for example, consists of excessive amounts of protein, processed grains and carbohydrates — particularly in the form of refined, added sugars — none of which is good for your health.
Bonnie J. Brehm, Randy J. Seeley, Stephen R. Daniels, and David A. D’Alessio, “A Randomized Trial Comparing a Very Low Carbohydrate Diet and a Calorie-Restricted Low Fat Diet on Body Weight and Cardiovascular Risk Factors in Healthy Women,” The Journal of Clinical Endocrinology & Metabolism: Vol 88, No 4; January 14, 2009. http://press.endocrine.org/doi/full/10.1210/jc.2002-021480.
The current hypothesis is that the brain functions differently on ketones than on glucose, and this is what causes certain brains to reduce epileptic seizures. I would then also hypothesize that certain people who feel that “brain fog” lifted on ketosis is due to either placebo effect OR their brain actually functioning differently on ketones vs glucose.
On the other hand, the types of foods you’ll avoid eating on the keto, low-carb diet are likely the same ones you are, or previously were, accustomed to getting lots of your daily calories from before starting this way of eating. This includes items like fruit, processed foods or drinks high in sugar, those made with any grains or white/wheat flour, conventional dairy products, desserts, and many other high-carb foods (especially those that are sources of “empty calories”).
At 4 weeks you should be feeling pretty darn good. If you are feeling better, but not awesome, give it a little more time. If you have not felt better throughout this time and have stuck strictly to your low carbs and high fat, your body may not align with the keto diet. If you only feel bad because you're craving bad food, this may be a mental "block" that you need to deal with. Coaching can help.
Unfortunately, there’s no long-term data on ketogenic diets versus other diets. In a 2015 Italian study, those on a ketosis diet lost 26 pounds in three months. About half of the participants stayed on the diet for a year but lost little additional weight in the next nine months. People in a 2014 Spanish study who followed a very-low-calorie ketogenic diet lost an average of 44 pounds in a year—but a third of them dropped out, possibly because it was too hard to maintain.
[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"
Hi Sia, welcome to the wonderful world of keto! I would start simple – eat whole foods like avocado, protein, and dark veggies. Download MyFitnessPal or CarbCounter apps to track your macros for you. What works best for me is planning out my meals ahead of time. Ill meal prep my food then log it into MyFitnessPal app so I know I am on target then the next day, eat only what I’ve logged. Its the perfect way to make sure you have enough food that already prepared and the best way to stick to macros. Hope that helps!
When you’re first getting started, it can be helpful to use a blood or breath ketone meter. What these meters do is measure the amount of ketones (the energy source your body is switching to) in your blood or your breath. Knowing those amounts and seeing how they increase or decrease depending on what you’re eating daily can often be a motivating and helpful indicator of the transition occurring in your body.
The keto diet is known for helping people lose a few pounds very quickly, says Becky Kerkenbush, RD, a clinical dietitian at Watertown Regional Medical Center. Carbs hold on to more water than protein or fat, so when you stop eating them, your body releases all that extra H2O by making you pee more. As a result, the scale might read a few pounds lower, and you may look a bit leaner.
Here’s the Knowledge Stage analogy: Say we are hungry and want to go out to eat. It wouldn’t make much sense to sprint to the nearest restaurant, right? Wouldn’t we be better served to take the few minutes to learn about what’s available, and then make a plan? Yes, we would take the time to Yelp or ask a friend for some knowledge and use that information to decide where we want to go.
It’s not for me, but it interesting to learn these things, and of course there seem to be good reasons for doing it for some people. I’m happy with the “eat less, exercise more” diet for now, but I might try out intermittent fasting since I’ve seen a few things suggesting it might help with allergies? I doubt that’s well supported, but I’ve liked what you’ve had to say about it, so since it’s not a thing I have to spend money on to try out, might as well, right?
There are numerous benefits that come with being on keto: from weight loss and increased energy levels to therapeutic medical applications. Most anyone can safely benefit from eating a low-carb, high-fat diet. Below, you’ll find a short list of the benefits you can receive from a ketogenic diet. For a more comprehensive list, you can also read our in-depth article here >
Other experts say the long-term accumulation of ketones could be harmful. “Those ketones are emergency fuel sources, and we’re not meant to run on them long-term,” says Kristen Kizer, a registered dietitian at Houston Methodist Hospital. “Ketones are negatively-charged molecules, which means they’re acidic. When you build up ketone bodies in your system, you’re building up acid. One of the ways your body buffers acid is by pulling calcium from your bones.” Kizer also notes that the diet isn't very balanced and involves a very high intake of animal products, which generally do not protect against cancer, diabetes, or other diseases.
Thanks for the very informative article. This was the push I needed to at least try it. Starting next weekend, my partner and I will be trying keto for 30 days. I’m all for small changes, in theory, but what I sometimes discover is that sweeping changes can have their place, too, if they produce positive results. Often, what will work for me is trying a big change, and even if I then throw out 80% of it, at least the remaining 20% sticks. By contrast, any backsliding from a small change can often mean just throwing it out entirely.
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