LCHF is a plan that is very similar to an Atkins approach, but the focus is placed on the higher ingestion of fats, and a perpetual restriction of carbohydrates to less than 20 grams per day, and in some cases nearly 0 grams a day are consumed. There is no specific restriction of artificial or manufactured foods, only that the fat is kept higher, around 70%-85% of the diet.
Experts are split on whether the keto diet is a good idea. On the one hand, Lori Chang, registered dietitian and a supervisor at the Center for Healthy Living at Kaiser Permanente West Los Angeles, says using a “cleaner” source of energy—ketones rather than quick-burning carbohydrates—can improve mood and energy levels. When you eat refined carbohydrates or just too many carbs in general, the blood is flooded with excess insulin, Chang says. "This can lead to a blood sugar rollercoaster that stresses the body and negatively impacts energy levels and mood. When you’re in a state of ketosis, however, ketone bodies don’t require insulin to cross the blood-brain barrier, which wards off unfavorable blood sugar levels."

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.

Beverages: It’s common to become dehydrated on the keto diet. Your insulin levels drop when you restrict carbs, and low insulin makes it harder for your body to retain sodium and water.[9] Drink plenty of plain water, and sip on bone broth to replenish electrolytes, especially during the first couple of weeks when your body is adjusting to the new diet.

There are reasons a strange diet like this has stuck around since the 1920's.  A diet like keto that is low in sugar lowers blood glucose and insulin levels has several positive effects on the body, especially in overweight or obese people. The ketogenic diet gives your body the chance to re-adjust its glucose and insulin levels.  In addition, there are health benefits that will enhance daily life, as well as help treat disease.  Check out these benefits of the ketogenic diet:
Experts are split on whether the keto diet is a good idea. On the one hand, Lori Chang, registered dietitian and a supervisor at the Center for Healthy Living at Kaiser Permanente West Los Angeles, says using a “cleaner” source of energy—ketones rather than quick-burning carbohydrates—can improve mood and energy levels. When you eat refined carbohydrates or just too many carbs in general, the blood is flooded with excess insulin, Chang says. "This can lead to a blood sugar rollercoaster that stresses the body and negatively impacts energy levels and mood. When you’re in a state of ketosis, however, ketone bodies don’t require insulin to cross the blood-brain barrier, which wards off unfavorable blood sugar levels."

If you talk to keto aficionados, you’ll find many save leftovers from dinner for the next day’s lunch. Cook once, eat twice—your keto diet menu for lunch is solved. If you don’t like leftovers or if you’re craving something different for lunch, the mid-day meal can be as simple as a scoop of chicken salad. Or, hit the salad bar at a local grocery store and top a bowl of greens with some good-fat goodies. You can also try one of these simple keto lunches:
This means that if you have risk factors for heart disease — such as elevated cholesterol levels, high blood pressure (hypertension), or a strong family history of the disease — you should use caution when following this diet. The diet's heavy reliance on fat, especially saturated fat, can elevate cholesterol levels, further increasing your chances of developing heart disease in the future. (7)
Fats are great if you want to add flavor and texture to your meals, and will help you feel full. Some people believe swear by coconut oil, and whether or not the claimed health benefits are actually present, it’s one of the fats that you might want to add to your diet. Butter is an excellent choice, as is ghee (Indian clarified butter). Duck fat is highly prized. Avocado oil is a great choice when making dressings or sauces, as it’s liquid at room temperature and has a mild flavor. The fats and oils listed here are primarily saturated, and they are the least likely to go rancid and produce free radicals and inflammation in the body (5, 6).
• Restricted ketogenic diet — As mentioned earlier, a ketogenic diet can be an effective weapon against cancer. To do this, you need to be on a restricted ketogenic diet. By restricting your carbohydrate and calorie intake, your body loses glycogen and starts producing ketones that your healthy cells can use as energy. Because cancer cells cannot use these ketones, they starve to death.12

Those issues can be part of what's known as the “keto flu,” Warren says. Other side effects of the keto diet, all of which are tied to carb withdrawal, can include lightheadedness, nausea, mental fog, cramps, and headaches, in addition to tiredness. Luckily, the keto flu doesn't usually last more than a week—which is coincidentally about when people start to see the number on the scale go down, says Warren.
Most alcoholic beverages don’t list the ingredients or nutritional information on the label, so be prepared and check your favorite drinks online so you know your limits beforehand. Most apps and trackers list many types of alcohol in their database, and this is the easiest way to be sure of what you’re drinking. Be warned, when you’re in ketosis your alcohol tolerance will go down, so you might not want to drink as much as you might be used to.
Another great keto flu cure is bone broth! This is also a great healer when you are actually sick with a cold or flu or just want something comforting. Instead of its high carb alternative chicken noodle soup or even worse, store bought chicken broth (which is typically loaded with MSG and other preservative junk), bone broth is a delicious way to alleviate your flu symptoms. Bone broth is a great way to hydrate & it is also packed with electrolytes, good for you sodium and potassium.
Can’t you take ketone supplements? No. While it is possible to elevate ketones by taking them, “without the low-carb stimulus, there is no net increase in ketone production, no decrease in insulin, and no net increase in fat oxidation,” says Volek. Don’t trust trainers or “body hackers” who say you can induce ketosis quickly without changing your diet.
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?

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