The Relationship Between Blood Sugar and Sodium Levels – Dr Harold Gunatillake
I have read an article authored by Louise Morales-Brown in Medical News Today, dated November 28, 2025, and I deemed it advantageous to disseminate the information to serve our Sri Lankan audience globally.
Both sugar and sodium are essential and play vital roles in the vascular system, providing immediate energy for activities and conveying micronutrients, hormones, and oxygen to every cell in the body.
Blood sugar and sodium levels are not directly related, but there is an association. Changes in your body’s sodium levels will not cause your blood sugar levels to rise or fall. However, one of the strongest links between blood sugar and sodium is hypertension.
Both salt and sugar intake are directly linked to increased systemic and hypothalamic inflammation, endothelialdysfunction, microangiopathy, cardiovascular remodelling, cancers, and death. High-fructose corn syrup is particularly harmful.
What causes inflammation in the hypothalamus?
Prolonged overnutrition with carbohydrates that are broken down to glucose in the gut leads to sustained hypothalamic inflammatory processes.
Not only does the hypothalamus play a role, but elevated blood glucose levels also substantially contribute to inflammation; therefore, maintaining blood glucose within a healthy range can reduce the risk of inflammation-related complications.
When sugar and salt, or either of them, are present at elevated concentrations in the bloodstream, they may induce an excess of water influx. This results in dilutional hypotension, which can lead to health complications.
On the other hand, high blood sugar levels can cause a drop in blood sodium.
When hyperglycemia causes sodium levels to drop in the blood (hyponatremia), the primary issue is the swelling of body cells, particularly brain cells, which can lead to a range of neurological symptoms from mild headaches to life-threatening cerebral oedema.
Mechanism
High blood sugar increases the osmolarity (concentration of solutes) of the blood. This high concentration draws water out of the body’s cells and into the bloodstream to maintain osmotic balance. This shift of water into the bloodstream dilutes the sodium, leading to dilutional or hypertonic hyponatremia. The resulting issues stem from the effects of this cellular swelling and the associated symptoms of hyponatremia.
Low blood sodium levels can affect brain function.
The brain is susceptible to alterations in sodium concentrations. Cellular swelling within the brain may lead to a spectrum of neurological complications.
Symptoms include headache, confusion, and difficulty concentrating; personality changes; loss of energy, drowsiness, and fatigue (lethargy); impaired consciousness, stupor, and in severe cases, coma; muscle weakness, cramps, or twitching; poor balance and coordination (ataxia); and seizures.
Regular monitoring of blood sodium and glucose levels is imperative, as elevated sodium and hyperglycemia constitute significant risk factors for cardiovascular and renal diseases.
Sri Lankans consume nearly twice the recommended daily salt intake, posing a significant public health concern.
The World Health Organisation (WHO) recommends that adults limit their salt intake to no more than 5 grams (approximately one teaspoon) per day to reduce the risk of hypertension, cardiovascular disease, stroke, and renal disease.
Key Findings on Salt Consumption in Sri Lanka
Average Intake: Estimates from national surveys indicate that the average daily salt intake per person in Sri Lanka is approximately 8.3-10.5 grams, substantially surpassing the World Health Organisation’s (WHO) recommended limit of 5 grams.
Source of Salt: The predominant source, accounting for 70-80%, is salt added during home cooking, including the addition of salt to rice and curries. The consumption of traditionally preserved salty foods, known as “rice-pullers,” also contributes significantly.
Awareness Gap: Although the majority of the population recognises the adverse health effects of high salt intake, such as hypertension, awareness of the WHO-recommended daily limit of 5 grams remains low. Furthermore, many individuals believe that their salt consumption is “just the right amount. ”
Low-sodium foods primarily consist of fresh, unprocessed items such as fruits, vegetables, fresh meats, poultry, fish, and eggs.
Additionally, grains like rice, pasta, and oats can be included when prepared without salt. Unsalted dairy products and nuts are also suitable options. Emphasis is placed on selecting low-sodium versions of processed staples, including soups, sauces, and bread, and utilising herbs and spices for flavour enhancement rather than salt. Essential choices encompass fresh produce, lean proteins, beans, lentils, and low-sodium dairy, while avoiding salty processed foods, pickled items, and salty sauces.
This article emphasises the significance of maintaining normal blood glucose and sodium levels for overall well-being and a healthy life.
It emphasises that elevated blood glucose levels can lead to artificially low blood sodium measurements. This phenomenon occurs because excess glucose draws water into the bloodstream, thereby diluting it.
I hope this article has been helpful, encouraging you to reduce your salt intake to a minimum while monitoring your blood sugar daily for health benefits and to enhance biological age.
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