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.

If you want to slam a protein shake post-workout, that's probably fine as long as you've got room for it in your macros. But shoot for one that is very low—like, zero—in carbohydrates. Pure isolates, such as Signature 100% Whey Isolate, are extremely low in carbohydrate. If you struggle to fit fat in during the day, toss a tablespoon of olive oil in with your shake. You won't taste it, and it gives a quick 13-14 grams of fat.
The most science-backed performance-boosting supplements, such as creatine monohydrate, beta-alanine, and caffeine, are all A-OK on the ketogenic diet. So, if you take a pre-workout, you should be able to continue without issue. I would also recommend gulping down some bouillon before your session to ensure your sodium and magnesium levels are on point.

Coconut MCT oil, cacao butter, grass-fed whey protein, organic almond butter, and other keto-approved ingredients combine for this protein bomb of an energy bar, designed specifically to support ketone production and keep you fit and focused for hours. It’s basically like jumper cables for your metabolism… if jumper cables tasted like smooth chocolate and almonds.
Keto bombs are snacks that ketogenic dieters love because they’re healthy, delicious cheat foods that are high in fat, but virtually devoid of carbs and protein. I have a lot of videos on how to make keto bombs, but you don't have to have them with each meal. The goals would be to have one a day. Dumping a lot of butter or coconut oil into your coffee may not work for you. Some people can digest it, and some people can't.
That’s why you’ll find snacks of all flavors — salty, sweet, and savory — in this keto snack recipe roundup. There are grab-and-go options, as well as keto snacks requiring some preparation and cooking. We’re willing to bet that they’re in fact so tasty, you’ll forget you’re on a diet. All the while, these keto snacks will keep you going strong in ketosis — that uber fat-burning state you’re aiming for as your body shifts from burning carbs to fats for fuel.
Consuming large salads with spring mix, spinach, arugula, or even cabbage will start to give you the nutrients that help undo insulin resistance. There are numerous studies that demonstrate how various nutrients such as vitamins A, B, C, D, K, potassium, magnesium and chromium improve insulin sensitivity. Adding in intermittent fasting will also help insulin dysfunction, which is the icing on the cake. (Sorry, I couldn’t resist that one.)

Look at the glycemic index to choose the best foods for your ketogenic meal plan. There are websites that provide the glycemic index (GI) or glycemic load of different foods. The glycemic index tells you how your body's glucose and insulin system will respond to different foods. Foods that are lower on the index (or have a lower glycemic load) are foods that digest more slowly and will help you to feel full for a longer period of time.
But when you look at long-term results, there is very little difference between the two. 'Part of this is because adherence is very poor for low-carb diets in the long term – that is, people find it difficult to maintain a very low-carb diet, which suggests it's probably not sustainable to continue eating this way in the long-term,' says Dr Barclay.

Fat is the cornerstone of the keto diet, making up the bulk of calories. An individual consuming 2,000 calories per day would need to consume 144 to 177 grams of fat. Fats make up 70-80% of your calories. Since fat is the main source of nutrition on a ketogenic diet, it’s important to source high-quality, healthy fats, which you’ll read about below.


Around this time, Bernarr Macfadden, an American exponent of physical culture, popularised the use of fasting to restore health. His disciple, the osteopathic physician Dr. Hugh William Conklin of Battle Creek, Michigan, began to treat his epilepsy patients by recommending fasting. Conklin conjectured that epileptic seizures were caused when a toxin, secreted from the Peyer's patches in the intestines, was discharged into the bloodstream. He recommended a fast lasting 18 to 25 days to allow this toxin to dissipate. Conklin probably treated hundreds of epilepsy patients with his "water diet" and boasted of a 90% cure rate in children, falling to 50% in adults. Later analysis of Conklin's case records showed 20% of his patients achieved freedom from seizures and 50% had some improvement.[10]
If you want to slam a protein shake post-workout, that's probably fine as long as you've got room for it in your macros. But shoot for one that is very low—like, zero—in carbohydrates. Pure isolates, such as Signature 100% Whey Isolate, are extremely low in carbohydrate. If you struggle to fit fat in during the day, toss a tablespoon of olive oil in with your shake. You won't taste it, and it gives a quick 13-14 grams of fat.
But the real reason why keto plans fail most of us is that they're not sustainable for the long term. Holidays, vacations, work functions … there's likely at least one scenario in which you'll find yourself eating higher-carb foods. And the same reasons why we see immediate weight loss on carb-restricted diets is the same reason why we see immediate weight gain after adding a seemingly harmless sandwich back into the mix: The water weight comes back instantly with glycogen storage.
This is the only way my kids will eat Brussels sprouts! It’s actually great for me because this dish is fast, easy and healthy, and it makes a lovely side. Quick-cooking Brussels sprout halves are available in the prepackaged salad aisle at the grocery store. They’re a timesaver if you can find them, but you can always just buy whole ones and slice them in half. —Teri Rasey, Cadillac, Michigan
As you transition from three meals to two meals or even to one meal a day, you will need to consume more fat. There are all sorts of great desserts you can create that support your weight-loss program. There are also keto bombs, which are fat-rich cookies that can be consumed at the end of the meal to make it incredibly easy to do intermittent fasting. Here are some examples:

A keto diet has shown to improve triglyceride levels and cholesterol levels most associated with arterial buildup. More specifically low-carb, high-fat diets show a dramatic increase in HDL and decrease in LDL particle concentration compared to low-fat diets.3A study in the long-term effects of a ketogenic diet shows a significant reduction in cholesterol levels, body weight, and blood glucose. Read more on keto and cholesterol >
×