The keto diet is a high-fat, low-carb eating plan that puts your body in a state of ketosis, where it burns fat for energy instead of carbohydrates. The transition to keto can be challenging, and you may experience the keto flu during the first few days or weeks as your body adjusts to using fat for fuel. However, once you make the switch to ketosis, you will likely notice increased energy levels and improved mental focus. To start keto, it's important to understand which foods to eat and avoid, adjust your view of fat and protein, and be prepared for possible side effects like constipation or diarrhea. It's also crucial to acknowledge when keto might not be right for you, as it can be challenging to follow for those with existing dietary restrictions or certain medical conditions.
Characteristics | Values |
---|---|
Diet type | Low-carb, high-fat |
Carbohydrate intake | 50g per day |
Fat intake | 65-80% of calories |
Protein intake | 20-35% of calories |
Net carbs intake | 5-10% of calories |
Calorie intake | No restriction |
Exercise | No over-exercising or under-exercising |
Water intake | High |
Electrolytes | High |
Sleep | Sufficient |
What You'll Learn
- The transition period: the first 10 days of keto
- The keto flu: a cluster of symptoms that occur during the adjustment period
- Dehydration: the importance of staying hydrated and replenishing electrolytes
- Undereating: how consuming too few calories can lead to fatigue
- Exercise: the balance between overexercising and underexercising
The transition period: the first 10 days of keto
The first 10 days of keto can be challenging as your body transitions from using glucose to ketones for fuel. This period is known as the "transition period" or "keto flu" and is characterised by symptoms such as headaches, fatigue, muscle aches, nausea, brain fog, and irritability. Here's what you can expect during the first 10 days of keto:
Day 1:
On your first day of keto, you will likely spend most of your time figuring out your macro ratios and trying to meet the recommended 70-75% fat intake. This is a big change from the Standard American Diet, and keeping your protein low (around 15%) can be tricky.
Day 2:
The second day is typically when the ""carb flu" symptoms start to kick in. Your body is realising it's not getting carbohydrates anymore, and you may experience headaches, fatigue, muscle aches, nausea, brain fog, and irritability. Remember that these symptoms are normal and will pass.
Day 3:
Day 3 is usually the worst day of the "carb flu." Be gentle with yourself and minimise your activities and work if possible. Your body is working hard to transition to breaking down fats for fuel, which can be brutal.
Day 4:
Today will likely be a better day than Day 3. Your body is getting used to running on fats for fuel, and the worst of the transition is behind you. You may still feel some fatigue and malaise, but use your newfound energy to meal prep for the upcoming week.
Day 5:
By the end of the first week, you'll likely be hitting your stride. You now have a better understanding of what it means to eat a diet that's high in fat and very low in carbohydrates. You may not have officially entered ketosis yet, but you can test your ketone levels with urine or blood tests to see if you're close.
Day 6:
By the second week, most people will have entered ketosis and will be feeling the positive effects of keto-adaptation, including improved mental concentration, focus, and increased physical energy. Your carb flu symptoms will likely have dissipated, and you'll be used to eating a high-fat diet.
Day 7:
You might find that your energy levels are increasing, and the "2 pm slump" is a thing of the past. Carbohydrates are the cause of the spike and drop in blood sugar throughout the day, so by limiting your carb intake, you can avoid these fluctuations. Most people report feeling steady energy that lasts all day.
Day 8-10:
During these days, you may feel like you're not that hungry and have to remind yourself to eat. Remember to prioritise water intake as you hit ketosis, as the high amount of ketones in the body can lead to dehydration.
Tips for the transition period:
- If possible, start the keto diet on a Thursday, as days 3 and 4 are usually the hardest. This way, the toughest days fall on the weekend, giving your body and brain more time to adjust.
- Eat lots of fat and non-carb sources of fibre to help you feel full and reduce cravings for carb-laden foods.
- Go easy on physical activity during the transition period. Stick to gentle forms of exercise like walking and stretching for the first few weeks.
- Stay well-hydrated, as ketosis can lead to dehydration.
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The keto flu: a cluster of symptoms that occur during the adjustment period
The keto flu is a collection of symptoms that occur when the body adapts to a new diet consisting of very few carbohydrates. This is caused by the body entering a state of ketosis, where it burns ketones for energy instead of glucose. Ketones are byproducts of fat breakdown and become the main fuel source when following a ketogenic diet.
Symptoms of keto flu can include:
- Headaches
- Brain fog
- Fatigue
- Irritability
- Nausea
- Difficulty sleeping
- Constipation
- Diarrhea
- Muscle soreness
- Cravings
These symptoms can range from mild to severe and can last from a few days to several weeks. In some cases, they may even persist for up to a month.
To ease the symptoms of keto flu, it is recommended to:
- Drink plenty of water to stay hydrated
- Avoid strenuous exercise
- Replace lost electrolytes
- Get plenty of sleep
- Ensure you are eating enough fat and carbohydrates
- Cut out carbs slowly over time
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Dehydration: the importance of staying hydrated and replenishing electrolytes
Dehydration is a common side effect of the keto diet. When the body enters ketosis, the liver produces ketones, which can result in increased loss of body fluids, water, electrolytes, and nutrients, and may lead to dehydration.
Why hydration is important
Even mild dehydration can impair memory, reasoning, and cognitive function, cause fatigue, and make you feel unwell. Research also suggests that ketogenic diets increase the risk of kidney stones in people who are not adequately hydrated.
How to stay hydrated on keto
Drinking water is one of the best ways to stay hydrated. Eating water-rich foods such as watermelon or lettuce can also help. It is also important to add electrolyte-replenishing drinks into your routine.
The importance of electrolytes
Electrolytes are vital for the proper functioning of your body. Electrolyte imbalances can result in a range of problems, from headaches to muscle cramps and convulsions. Electrolytes allow your muscles to function normally, support cardiovascular health, promote deeper sleep, and improve brain functioning.
How to get electrolytes on keto
- Eat whole foods that are high in electrolytes, such as coconut water, avocados, beef, chicken, eggs, spinach, clams, salmon, lettuce, tomatoes, yogurt, and almonds.
- Use keto-friendly electrolyte supplements.
- Pay attention to your thirst and drink water or an electrolyte drink when you feel thirsty.
- Slowly transition into the keto diet.
- Talk to your doctor about any medications you are taking that may affect your electrolyte status.
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Undereating: how consuming too few calories can lead to fatigue
Undereating is a common problem that can lead to various health issues, including fatigue. This can occur due to intentional food restriction, following restrictive diets, or underlying health conditions. Here are some insights into the impact of undereating and strategies to address it:
Understanding Undereating
Undereating refers to consuming fewer calories than your body requires for proper functioning. This can happen unintentionally or due to restrictive diets, eating disorders, or other factors. It is essential to distinguish between undereating and healthy calorie restriction, as the former can have adverse health consequences.
Signs of Undereating
Fatigue is a prominent sign of undereating. When you don't consume enough calories, your body doesn't have sufficient energy, leading to physical tiredness and mental fatigue. This can impair your daily functioning and negatively affect your physical activity performance.
Other signs of undereating include frequent illnesses, hair loss, reproductive difficulties, constant feelings of cold, growth impairments in young people, skin problems, and constipation. Recognizing these signs is crucial to address undereating and its impact on overall health.
Health Risks of Undereating
Undereating can lead to becoming underweight, which brings its own set of health risks. These risks include osteoporosis, bone fractures, developmental problems, a weakened immune system, and increased risk of surgical complications. It is important to monitor your weight and seek professional advice if you suspect undereating.
Strategies to Address Undereating
If you suspect you are undereating, it is crucial to increase your calorie intake healthily. Focus on consuming meals high in protein, complex carbohydrates, and healthy fats, such as nuts and avocados. Include a variety of vegetables in your diet and ensure you are meeting your nutritional requirements.
Additionally, consider seeking advice from a doctor or dietitian, who can help you formulate a diet plan that meets your calorie and nutrient needs. They can provide guidance on the appropriate number of calories for your age, sex, and activity level.
In conclusion, undereating can have detrimental effects on overall health and well-being, with fatigue being a prominent symptom. By recognizing the signs and taking a proactive approach to nutrition, you can address undereating and improve your energy levels. Remember to seek professional guidance if you have concerns about your health or diet.
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Exercise: the balance between overexercising and underexercising
Exercise is an important component of a healthy lifestyle, and finding the right balance between overexercising and underexercising is crucial when starting a keto diet. While the keto diet can provide sustained energy, individuals may experience fluctuations in their energy levels during the transition phase, which can impact their exercise routines. Here are some insights into managing exercise while on a keto diet:
Understanding the Keto Transition
During the initial days of a keto diet, individuals often experience a period called the "keto flu," which involves symptoms such as fatigue, headaches, and nausea. This occurs as the body shifts from burning carbs to burning fat for fuel. The duration of this transition phase varies, but it typically lasts a few days to several weeks. It is important to be gentle with yourself during this time and avoid overexercising.
Managing Energy Levels
The keto diet can impact energy levels, and it is essential to strike a balance between rest and activity. While some people may experience increased energy and improved focus in the long term, others might deal with short-term fatigue. To manage energy levels effectively:
- Stay hydrated: Dehydration can cause symptoms similar to keto flu, so ensure you drink enough water.
- Replenish electrolytes: Use electrolyte powders in your drinks, and consume mineral-rich foods like avocado and fish.
- Consume enough calories: Undereating can lead to fatigue and metabolic issues. Eat when hungry and ensure sufficient calorie intake.
- Practice intermittent fasting cautiously: While intermittent fasting can be beneficial, it doesn't work for everyone. Start with three meals a day and add snacks if needed.
Exercise Recommendations
Finding the right exercise routine while on a keto diet may involve some trial and error. Here are some tips to consider:
- Avoid overexercising: Overexercising can lead to exhaustion, especially if calorie intake is not adequate.
- Avoid underexercising: A sedentary lifestyle can contribute to fatigue. Engage in moderate physical activity or exercise to boost energy levels.
- Consult a professional: If you're unsure, consider speaking to a doctor or personal trainer to develop a suitable exercise plan.
- Adjust your exercise intensity: If you follow a rigorous workout plan and feel low on energy, consider introducing carbs strategically through targeted keto or cyclical keto approaches.
Food Choices Matter
The quality of food choices can impact energy levels and exercise performance while on a keto diet:
- Prioritize whole foods: Opt for fresh produce, healthy meats, and healthy fats. Avoid "dirty keto," which includes processed keto snacks and foods with artificial additives.
- Monitor your macros: Ensure you're consuming adequate protein, especially if you're active. Use a keto macro calculator for guidance.
- Consider supplements: Keto supplements like MCT oil, exogenous ketones, and electrolytes can help maintain ketosis and support energy levels.
In conclusion, when starting a keto diet, it is crucial to find the right balance between overexercising and underexercising. Listen to your body, make gradual adjustments, and prioritize rest and proper nutrition during the transition phase. As your body adapts to burning fat for fuel, you can then focus on establishing a sustainable exercise routine that works for you.
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Frequently asked questions
The keto diet is a high-fat, very low-carb eating plan that puts your body in a state of ketosis. This is when your body's carb-burning switch flips to a fat-burning one, which can influence weight loss and type 2 diabetes management.
On the keto diet, you can eat meat, fatty fish, eggs, butter, cheese, nuts, seeds, healthy oils, avocados, and low-carb vegetables.
The keto diet can lead to weight loss, improved metabolic health, reduced risk of certain diseases such as heart disease and cancer, and better management of type 2 diabetes.
Common side effects of the keto diet include keto flu, which can cause lethargy, mental fog, constipation, and diarrhea. Other side effects may include decreased exercise performance, digestive issues, and sleep disturbances.