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What Happens If You ONLY Eat Carbs for 14 Days

author avatar Dr. Eric Berg 07/23/2024

What Happens If You ONLY Eat Carbs for 14 Days

You might be surprised to learn what a carbohydrate-only diet could do to your body, especially if you're used to the standard American diet.

Many people consume a large amount of carbohydrates daily, often without realizing the potential long-term effects of a diet high in this particular food group.

What Happens When You Eat Only Carbohydrates?

Let's explore what could happen if you were to eat only carbs for a couple of weeks. For clarity, this would involve consuming refined carbohydrates, like white rice, white bread, and sugary snacks.

This differs from a diet with complex carbs found in whole grains and vegetables.

Historical Evidence of Carbohydrate-Only Diet Effects

While research on a 100% carbohydrate intake diet is limited, we can gain insight from historical situations. Consider prisoners of war during World War II who subsisted solely on white rice.

Also, consider populations in late 19th century Japan who consumed primarily polished white rice. These situations highlight the dangers of relying heavily on refined carbs.

Refined Carbohydrates and Beriberi

These groups often developed beriberi, a severe vitamin B1 (thiamine) deficiency. This happened because the outer layer of the rice grain, which contains essential nutrients, was removed during processing.

Vitamin B1 is crucial for your body to convert carbohydrates into energy. This historical context sheds light on some significant effects of a diet high in this food group.

The Two Forms of Beriberi: Wet and Dry

Beriberi manifests in two forms: wet and dry. Wet beriberi primarily affects the cardiovascular system, leading to symptoms such as:

  • Edema (swelling) in the legs and other parts of the body.

  • Increased heart rate (rapid pulse).

  • Cardiomegaly (enlarged heart), a potentially life-threatening condition.

Dry beriberi, on the other hand, affects the nervous system. Dry beriberi can cause:

  • Numbness and tingling in the extremities.

  • Pain in the hands and feet.

  • Paralysis, in severe cases.

The Vagus Nerve and Digestive Issues

A lack of B1 also affects the vagus nerve. This is one of the longest and most important nerves in the body. This can lead to a range of digestive issues such as:

  • Constipation.

  • Loss of appetite.

  • Decreased production of hydrochloric acid in the stomach.

Without sufficient B1, the vagus nerve can’t effectively regulate digestive processes. Focusing on a proper diet with a variety of nutrient-dense foods is vital for supporting long-term health and well-being.

Low-carb foods on a table

Protein Deficiency on a Carb-Heavy Diet

A significant problem with consuming mostly refined carbs is the lack of adequate protein. Plant-based proteins often lack the same quality and bioavailability as those found in animal sources. Without enough protein, several health issues can occur.

The Role of Protein in the Body

Our bodies require a good deal of protein. This is necessary for building and repairing tissues. It also supports immune function and maintains healthy DNA.

The Consequences of Insufficient Protein Intake

When protein intake is low for an extended period, symptoms of deficiency can emerge. You may experience low mood, apathy, and even depression. Chronic fatigue and low energy levels are also common. These may include:

  • Impaired memory and cognitive function.

  • Sleep disturbances.

  • Skin problems, such as dryness and flakiness.

  • Muscle loss and weakness.

  • Weakened immune system, increasing the risk of infections.

In severe cases, hair loss can also occur. A carbohydrate-rich diet can lead to many negative effects.

The Importance of Fat in a Proper Diet

Healthy fats are vital for optimal health, and a diet primarily focused on carbs often lacks these essential nutrients. By "healthy fats," I am referring to those found in avocados, olive oil, nuts, seeds, and fatty fish, for example.

The Role of Fat in Hormone Production and Nutrient Absorption

Our bodies require healthy fats to produce hormones. Healthy fats also help absorb fat-soluble vitamins (vitamins A, D, E, and K) and support various bodily functions.

The Consequences of Inadequate Fat Intake

If we don’t consume enough healthy fats, it can lead to a variety of problems. Some problems associated with low-fat diets include dry skin and hair. It can also lead to weakened ligaments and joints, which increases your risk of arthritis. Other problems include:

  • Compromised vascular system, potentially leading to spider veins, red eyes, aneurysms, or even stroke.

  • Mood disorders like depression.

  • Impaired immune function.

Poor Liver Response to Insulin

Insulin Resistance and Metabolic Syndrome

A diet high in refined carbohydrates constantly spikes insulin levels. This potentially leads to insulin resistance over time. What are the long-term complications of metabolic syndrome?

What Happens During Insulin Resistance

When your body becomes resistant to insulin, it struggles to effectively use glucose (sugar) for energy. This can result in a cascade of health issues, often referred to as metabolic syndrome.

Long-term Complications of Metabolic Syndrome

Metabolic syndrome increases your risk of developing several serious health conditions, including type 2 diabetes, heart disease, and stroke. It can affect energy levels, mood, and organ function.

A simple carb diet can also increase the risk of chronic diseases.

A Word on Plant-Based Diets

While I’ve outlined the potential dangers of a carbohydrate-heavy diet, I know some individuals thrive on a carefully planned plant-based diet, which can naturally be higher in carbohydrates.

It's entirely possible to be healthy while consuming a primarily plant-based diet.

Key Considerations for Plant-Based Diets

However, it’s vital to be mindful of certain nutrients that might be harder to get from plant sources alone, such as vitamin B12, zinc, and omega-3 fatty acids.

If you follow a plant-based diet, consider working with a healthcare professional or registered dietitian. They can help make sure you’re consuming adequate nutrients to support your health.

Conclusion

A diet heavily reliant on refined carbohydrates and lacking essential nutrients can lead to a cascade of negative effects, as we've seen. It can affect energy levels, mood, organ function, and even increase the risk of chronic diseases.

Focusing on a proper diet with sufficient protein, healthy fats, and a variety of nutrient-dense foods is vital for supporting long-term health and well-being.

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