Dante Carrillo
A diet high in salt, or sodium, can have adverse effects on your health. While sodium is an essential nutrient that the body needs in small amounts, excessive sodium intake can cause high blood pressure, which is a major cause of stroke and heart disease. A high-sodium diet can also increase the risk of osteoporosis, stomach cancer, obesity, and kidney disease. The World Health Organization recommends that adults consume less than 2000 mg of sodium per day, which is equivalent to less than 5 g of salt. To reduce sodium intake, individuals can limit the use of table salt, choose lower-sodium foods, and read food labels to identify products with high sodium content.
| Characteristics | Values |
|---|---|
| High blood pressure | Uncontrolled high blood pressure can increase the risk of heart attack, heart failure, stroke, kidney disease, and blindness. |
| Heart disease | Diets high in sodium are associated with an increased risk of heart disease. |
| Stroke | High blood pressure caused by high sodium intake is a major cause of strokes. |
| Kidney disease | High sodium intake increases the risk of kidney disease. |
| Bone health | A diet high in sodium can cause calcium loss, leading to osteoporosis. |
| Cancer | High salt intake is linked to an increased risk of stomach cancer and gastric cancer. |
| Cardiovascular disease | High sodium intake is associated with an increased risk of cardiovascular diseases and related deaths. |
| Death | People with the highest sodium intakes have a higher risk of death from any cause. |
| Children | High salt intake is unsafe for babies as their kidneys are not fully developed. It is recommended that children under 14 consume even lower amounts of sodium than adults. |
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What You'll Learn
High blood pressure and risk of heart attack
High blood pressure, also known as hypertension, is a condition in which blood pressure remains elevated over time. Hypertension makes the heart work harder, and the high force of blood flow can harm the arteries and organs, including the heart, kidneys, brain, and eyes. Uncontrolled high blood pressure can increase the risk of heart attack, heart failure, stroke, kidney disease, and blindness.
The World Health Organization (WHO) recommends that adults consume less than 2000 mg of sodium per day (equivalent to less than 5g of salt or just under one teaspoon). However, the average intake of sodium for adults is much higher, at 4310 mg/day. This excessive sodium intake contributes to high blood pressure, which is a significant risk factor for heart attacks and other cardiovascular diseases.
To reduce sodium intake, it is important to limit the consumption of packaged and processed foods, which are the primary sources of sodium in our diets. These include breads, processed meats, snacks, condiments, and canned goods. Reading nutrition labels and choosing lower-sodium options can help manage sodium intake. Additionally, using alternatives like herbs, spices, and black pepper instead of salt when cooking or seasoning food can also help reduce sodium intake.
It is worth noting that some people may be more \"salt-sensitive\" than others and will experience greater reductions in blood pressure when following a reduced-sodium diet. However, the overall evidence supports the benefit of limiting sodium intake for everyone, as it can help lower blood pressure and reduce the risk of heart attacks and other cardiovascular issues.
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Increased risk of stomach cancer
Salt, also known as sodium chloride, is composed of about 40% sodium and 60% chloride. While sodium is an essential nutrient that helps maintain a balance of body fluids and keeps muscles and nerves functioning smoothly, excessive sodium intake can lead to various health issues.
Research has found a link between higher salt, sodium, or salty food intake and an increased risk of stomach cancer. The World Cancer Research Fund and American Institute for Cancer Research concluded that salt and salted foods are a "probable cause" of stomach cancer.
Excessive sodium intake can also cause high blood pressure, which is a major risk factor for cardiovascular disease, heart attack, heart failure, stroke, kidney disease, and blindness. The World Health Organization (WHO) recommends that adults consume less than 2000 mg of sodium per day (equivalent to less than 5 g of salt or about one teaspoon). However, the global mean intake of adults is significantly higher, at 4310 mg/day of sodium.
To reduce your sodium intake, it is important to limit the use of table salt and sauces high in sodium, such as soy sauce, ketchup, and mayonnaise. Additionally, packaged and processed foods contribute significantly to sodium intake, so it is advisable to opt for lower-sodium or reduced-sodium versions of your favorite foods. Reading nutrition labels and choosing fresh, frozen, or canned foods without added salt can also help reduce sodium consumption.
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Osteoporosis
It is important to limit salt in your diet because of the health risks associated with a high-salt diet, such as high blood pressure and osteoporosis.
The link between salt intake and osteoporosis is a topic of ongoing research and some controversy. While some studies suggest that a high-salt diet can increase the risk of osteoporosis, others indicate that salt intake has little impact on bone health. One study found that a low-salt diet did not lead to stronger bones in postmenopausal women, which was a surprising result. However, it is important to note that most people in the Western world consume too much salt, with an average intake of 8 grams per day, exceeding the recommended maximum of 6 grams.
Salt is known to increase the amount of calcium excreted in urine, which can lead to bone demineralisation and a potential increase in the risk of osteoporosis. Calcium is essential for maintaining bone strength, and a high-salt diet can cause calcium loss from bones, contributing to osteoporosis. This is particularly relevant for young and adolescent girls, as studies have shown a correlation between salt intake and calcium excretion in this age group, potentially affecting their peak bone mass and future osteoporosis risk.
While the relationship between salt and osteoporosis is not fully understood, it is generally recommended that people with or at risk of osteoporosis keep their salt intake below 6 grams per day. A balanced diet with adequate calcium intake and regular physical activity are crucial for maintaining bone health and reducing the risk of osteoporosis.
In summary, while the exact mechanism is still being studied, there appears to be a link between excessive salt intake and osteoporosis, particularly due to salt's impact on calcium excretion and bone health. Therefore, limiting salt in your diet may be beneficial in maintaining bone strength and reducing the risk of osteoporosis, especially when combined with other healthy lifestyle factors.
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Too much salt in children's diets
It is important to limit salt in your diet because excessive salt consumption is associated with several health risks. Firstly, a high-salt diet can lead to increased blood pressure, which is a major risk factor for cardiovascular diseases, including heart attacks and stroke. People with high-salt diets have been found to have a 20% higher risk of death from any cause. Secondly, salt increases calcium excretion through urine, which can lead to bone thinning and osteoporosis, a condition that weakens bones. Research also suggests a link between high salt intake and an increased risk of stomach cancer.
Excessive salt consumption is a concern not only for adults but also for children. The typical Western diet often exposes children to excessive amounts of salt, with processed, packaged, and prepared foods being major contributors. On average, children aged 2 to 18 exceed recommended sodium intake levels by over 40%, with males aged 14 to 18 consuming the highest amounts.
The high salt intake among children has concerning health implications. Firstly, it increases the risk of elevated blood pressure, with kids on high-sodium diets being about 20% more likely to have high blood pressure. High blood pressure during childhood increases the risk of heart disease, stroke, and the likelihood of continuing high blood pressure into adulthood.
Secondly, a high-salt diet in childhood can increase the risk of osteoporosis later in life. This is because salt increases the amount of calcium lost through urine, which can lead to bone thinning. While osteoporosis is more common in older individuals, the effect of salt on calcium can be detected in children, increasing their risk of developing this condition in the future, especially for girls.
Additionally, dietary habits formed during childhood tend to persist into adulthood. Therefore, children who develop a preference for salty foods may continue these habits later in life, increasing their long-term health risks.
To address this issue, parents and caregivers can make simple changes to reduce salt intake in children's diets. This includes offering snacks like yogurt, carrot sticks, and fruit instead of salty options, opting for homemade meals with fresh ingredients, and choosing lower-sodium options when purchasing processed foods. Reading nutrition labels and comparing sodium content can help make informed choices. Additionally, involving children in preparing healthy meals and modelling healthy eating habits can encourage a lifelong preference for nutritious, low-sodium foods.
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Salt is hidden in packaged foods
Salt is added to many packaged foods, and it is often difficult to know how much salt is in a product without reading the label carefully. The sodium content of packaged foods can be particularly high, and it is important to be aware of this when trying to reduce salt intake.
Processed foods such as breads, processed meats, snack foods, and condiments often contain high amounts of sodium. This is because salt, or sodium chloride, is used as a preservative, binder, and stabilizer in these products. It also enhances the flavour and texture of food. In addition, some packaged foods that do not taste salty can still contain significant amounts of sodium. For example, cereals and pastries may have high sodium content, even though they do not have a salty flavour.
When buying packaged foods, it is important to read the labels carefully to check for sodium content. Look for the words "soda" and "sodium", as well as the symbol "Na", which indicate the presence of sodium compounds. Many canned and frozen food labels will also indicate if they are "low salt" or "low sodium". Choosing these options can help to reduce salt intake.
In addition to choosing lower-sodium options, there are other ways to reduce salt intake when buying packaged foods. For example, buying fresh, frozen, or canned vegetables without added salt or sauce can help. Choosing unsalted nuts, seeds, dried beans, peas, and lentils can also reduce salt intake. It is also possible to find unsalted or low-sodium broths, bouillons, and soups. By being mindful of these options and reading labels carefully, it is possible to significantly reduce salt intake from packaged foods.
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Frequently asked questions
Excess salt intake can cause high blood pressure, which increases the risk of cardiovascular diseases, gastric cancer, obesity, osteoporosis, Meniere’s disease, and kidney disease.
One way to reduce salt intake is to skip the salt shaker and avoid adding extra salt to your meals. Instead, try adding flavour to your food with herbs, black pepper, garlic, chilli, or lemon juice.
Processed foods such as sauces (soy sauce, ketchup, mayonnaise), breads, cured meats, canned goods, and condiments tend to be high in sodium.
When buying prepared and packaged foods, opt for low-sodium or no-salt-added versions. Choose unsalted nuts, seeds, dried beans, peas, and lentils.
The World Health Organization recommends that adults consume less than 2000 mg/day of sodium (equivalent to less than 5 g/day of salt or approximately one teaspoon).
