Why does blood pressure drop on keto diet?

A drop in blood pressure on a ketogenic diet can occur for several reasons related to the diet’s impact on fluid and electrolyte balance. Here’s a more detailed explanation:

When you start a ketogenic diet, which is very low in carbohydrates and high in fats, your body undergoes significant metabolic changes. Initially, as your body shifts from using glucose (carbs) for energy to using fat and ketones, it starts to excrete more water. This is because glycogen, the stored form of glucose in your muscles and liver, binds with water. When glycogen levels drop on a keto diet, water is also released and excreted, leading to a reduction in blood volume.

The loss of water and sodium can lead to a decrease in blood pressure. Sodium plays a crucial role in maintaining fluid balance and blood pressure. On a keto diet, lower insulin levels lead to reduced sodium retention by the kidneys, which further contributes to the decrease in blood pressure. This change can make you more susceptible to lower blood pressure, especially during the early stages of the diet.

Additionally, the keto diet may also affect other electrolytes like potassium and magnesium. If your diet lacks sufficient sources of these essential minerals, it can further impact blood pressure regulation. Potassium and magnesium are vital for maintaining cardiovascular health and proper muscle function, including the muscles involved in regulating blood pressure.

Symptoms of low blood pressure on a keto diet might include dizziness, lightheadedness, or fainting, particularly when standing up quickly or after prolonged periods of sitting. These symptoms occur because of the reduced blood volume and changes in fluid balance.

To manage these effects, it’s important to stay well-hydrated and ensure adequate intake of electrolytes. Consuming foods rich in potassium and magnesium, or taking supplements if necessary, can help maintain balance. Adding a bit more salt to your food may also help retain sodium and stabilize blood pressure, but this should be done under the guidance of a healthcare provider.

If you experience persistent or severe symptoms, or if blood pressure drops significantly, it’s crucial to consult with a healthcare provider. They can offer personalized advice and adjustments to your diet to ensure that your blood pressure remains within a healthy range while on a ketogenic diet.