Brenda Khan
Carbohydrates are a basic nutrient that the body turns into glucose (blood sugar) to make energy. Popular low-carb diets like keto, Atkins, and Whole30 have made cutting carbs trendy. While reducing carb intake can lead to weight loss, it can also cause side effects like fatigue, dizziness, and constipation. Additionally, low-carb diets are often low in fiber, which can negatively impact digestion and increase the risk of kidney disease, osteoporosis, and impaired physical activity. Cutting carbs can also lead to lower serotonin levels, affecting mood regulation, sleep, and cognition. While it may be tempting to cut carbs to lose weight, it is important to consult a healthcare professional and ensure a well-rounded diet that includes nutrient-dense carbohydrates such as whole grains, fruits, and vegetables.
Characteristics and Values Table for Cutting Carbs Out of Your Diet
| Characteristics | Values |
|---|---|
| Weight Loss | Carbohydrates are rich in starch, fiber, and water. Cutting carbs can help with weight loss, but it is mostly water weight at first. |
| Energy | Carbohydrates are a source of fuel for the body and brain. Cutting carbs may lead to lower energy levels and fatigue. |
| Nutritional Ketosis | Very low-carb diets can trigger nutritional ketosis, where the liver produces ketones for fuel instead of glucose. |
| Fluctuating Mood | Carbohydrates enable the brain to produce serotonin, which regulates mood. Cutting carbs can lead to lower serotonin levels and potential mood changes. |
| Digestive Issues | Carbohydrates provide fiber, which aids digestion and promotes healthy gut bacteria. Cutting carbs can lead to constipation and other digestive issues. |
| Restricted Diet | Carbohydrates are a crucial part of a balanced diet. Cutting carbs can be restrictive and challenging to sustain long-term. |
| Health Risks | Low-carb diets may be associated with increased mortality, higher cholesterol, kidney issues, and osteoporosis. |
| Food Choices | Cutting carbs involves eliminating sugary drinks, refined grains, and packaged snacks. |
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Weight loss
Carbohydrates are a source of energy for the body. They are one of three macronutrients, the others being protein and fat. Carbohydrates enable the brain to produce serotonin, which plays a role in mood regulation, sleep cycle, and cognition.
Carbs, especially refined or processed ones, tend to convert into sugars in the body very quickly. If you eat more carbs than your body can use or store, the body converts them into fat for later use. If the body doesn't need this energy, it stays in the fat cells, and a buildup of this excess from each meal may lead to weight gain over time.
Cutting carbs from your diet can help you lose weight, but it may not be sustainable or healthy. A sudden lack of carbs will make you lose weight, but it's mostly water weight at first. This is because cutting carbs also wipes out the glycogen stores in your muscles, and glycogen helps your body retain water. When you start eating carbs again, the water weight comes right back.
Low-carb diets can help you lose weight, but they may not be suitable for everyone. Research shows that low-carb diets hardly made any detectable difference in weight loss compared to a diet high in carbs. However, other studies show that low-carb diets can reduce a person's appetite, lead to them eating fewer calories, and help them lose weight more easily than other diets, provided they maintain the diet.
If you're looking to lose weight, eating fewer carbs may help, but it's important to watch your carb portions and ensure you're getting all the necessary nutrients. The number of carbs you should eat daily depends on your age, sex, body type, and activity level. It's recommended that carbs provide 45% to 65% of your daily calorie intake.
One way to cut carbs is to eliminate sugary beverages, as these often contain large amounts of sugar and are a significant source of carbohydrates. Another way is to focus on high-protein foods, as protein helps increase satiety, making you feel fuller for longer.
It's important to note that cutting carbs alone does not cause weight loss, only caloric deficits do. Additionally, low-carb diets may not be sustainable or enjoyable for everyone, and it's essential to consult with a healthcare professional or dietitian before making any significant changes to your diet.
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Nutritional ketosis
To achieve nutritional ketosis, one must restrict their carbohydrate intake to less than 50 grams per day for at least three days. This restriction causes a decrease in insulin release, promoting a metabolic shift towards lipid oxidation and the utilisation of fatty acids and ketones for energy. Nutritional ketosis has been found to improve metabolic and inflammatory markers, aid in weight management, and potentially treat and manage diseases such as epilepsy, type 2 diabetes, and neurologic conditions.
However, there are potential side effects to consider. Nutritional ketosis may increase uric acid levels, leading to kidney stones or gout flares. Additionally, low-carb diets are typically low in fibre, which can lead to constipation and digestive issues. Some studies have also linked low-carb diets to increased LDL ("bad cholesterol") and long-term complications such as kidney damage, osteoporosis, and impaired physical activity.
It is important to note that nutritional ketosis should not be confused with diabetic ketoacidosis, which is a life-threatening condition resulting from a complete insulin deficiency in diabetes. Nutritional ketosis, on the other hand, involves stabilised blood sugar and insulin levels, allowing the body to maintain normal blood glucose levels and pH.
Overall, nutritional ketosis has potential benefits for weight management and certain health conditions, but it is important to carefully monitor carbohydrate intake and be aware of potential side effects to maintain overall health.
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Low energy
Cutting carbohydrates from your diet can result in low energy levels, especially during the initial phase of carb restriction. Carbohydrates are the body's primary source of energy, and when they are restricted, the body needs to adapt to using fat as its main fuel source, which can
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Digestive issues
Carbohydrates are made up of sugars, starches, and fibres. Sugars improve the taste, texture, and colour of food. Starches are made up of many sugar molecules linked together, which are then broken down in the body into glucose and used for energy. Fibre, another type of carb, is not digestible but can be fermented in the colon or pass through the digestive system, absorbing water and adding bulk to stools.
Since carbs are rich in starch and fibre, cutting them out of your diet may make going to the bathroom a more unpleasant experience. Fibre helps add bulk to stool and absorb water in the colon, making stool easier to pass. Therefore, cutting carbs may result in constipation. This is usually temporary and clears up in a few weeks. Fibre also promotes the growth of healthy bacteria in the gut. Without it, you may experience digestive issues and changes in digestion.
Low-carb diets are also typically low in fibre. This can lead to gas getting trapped in your digestive tract, causing stomach pain and a feeling of fullness. However, staying well-hydrated and ensuring you get enough electrolytes may help alleviate these symptoms.
In addition, a no-carb diet restricts fruits, most vegetables, beans, and whole grains, which can lead to insufficient nutrients. This diet may not provide enough vitamins and minerals, such as potassium, B vitamins, and vitamin C, which are abundant in the restricted food groups.
It is generally not recommended that healthy adults completely cut out carbs unless they are on a medically supervised diet. Carbohydrates are an essential macronutrient and provide most of the fuel for daily activity and functioning. They are the body's primary source of energy, so cutting them out may lead to low energy and fatigue.
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Kidney damage
A well-formulated low-carb diet is considered safe for people with normal kidney function, and it may help treat diabetes and high blood pressure—the two biggest causes of kidney damage. Therefore, a low-carb diet may help prevent kidney damage in people with normal kidney function or early-stage kidney disease.
However, there are some exceptions. Firstly, people with early-stage diabetic kidney disease should be aware that while some studies show a benefit to eating low-carb, others show that restricting protein can prevent kidney function from worsening. This is because a moderate to high protein intake can accelerate the deterioration of kidney function when the kidneys are already significantly damaged. In such cases, restricting protein can slow the progression to end-stage kidney failure, reduce protein in the urine, delay the onset of kidney failure symptoms, and delay the need for dialysis or transplantation.
Secondly, those with a history of kidney stones or who experience an episode of kidney stones after starting a low-carb diet should ensure their diets minimize the consumption of foods that can cause kidney stones. This is because low-carb diets have been associated with an increased risk of kidney stone formation, especially when the diet is first started.
Thirdly, obesity and diabetes can contribute to a decline in kidney function. While low-carb diets can treat these conditions, the high-protein content may promote hyperfiltration in the kidney, a risk factor for eventual kidney function decline.
It is important to note that individual nutritional needs vary, and a kidney-friendly eating plan can help slow down damage to the kidneys. Consulting a qualified physician or nephrologist is essential before starting a low-carb diet, especially for those with advanced stages of kidney disease.
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Frequently asked questions
Some positive effects of cutting carbs include:
- Weight loss
- Lower blood sugar, which is important for people living with diabetes
- Lower blood pressure
- Reduced appetite and calorie intake
- Improved mood and brain function
Some negative effects of cutting carbs include:
- Nutritional ketosis, which can lead to weakness, fatigue, dizziness, and headaches
- Lack of fibre, which can cause constipation
- Increased cholesterol
- Kidney damage
- Lack of energy
Some easy ways to cut carbs include:
- Removing refined grains from your diet gradually, such as bread, crackers, biscuits, and baked goods
- Ordering "protein style" at restaurants, which usually means removing the bun or bread from your meal
- Eliminating sugary beverages, such as soda and energy drinks, and replacing them with water or herbal tea
- Choosing whole grains, fruits, and vegetables over sugary drinks, candies, and baked goods
