What Does Sodium Really do to Your Body?

We’ve all heard it: “Cut back on salt because it raises blood pressure.” While that’s true, sodium’s effects on the body go far beyond just hypertension.

Emerging research shows that a high-sodium diet can suppress natural antioxidant activity in the body, increase oxidative stress in arteries, and cause immediate arterial stiffness, even in people who don’t have high blood pressure. This means that even if your blood pressure seems fine now, your arteries might still be silently reacting to high sodium levels after a salty meal.

Why So Much Salt in Processed Food?

Processed and ultra-processed foods, like pizza, chips, cured meats, cheese, and pre-packaged meals, are some of the biggest culprits when it comes to excess sodium intake.

Why is so much salt added? Here’s why:

• Flavour enhancer: Salt balances sweetness and reduces bitterness.

• Preservation: It draws out moisture, making food less prone to bacterial growth.

• Weight manipulation: In some countries like the US, raw meat (particularly chicken) is injected with salty water to increase its weight, and therefore its price. While this isn’t standard practice in Australia, imported or processed meats may still carry a hefty sodium load.

• It makes you thirsty: Salt stimulates thirst, which may lead consumers to buy soft drinks or flavoured beverages alongside salty snacks.

How Much Sodium Do You Really Need?

The body does need some sodium, it plays a role in fluid balance, nerve function, and muscle contractions. But the amount found naturally in whole foods like vegetables, grains, legumes, fruits, and nuts is more than enough for your daily needs.

The Australian Heart Foundation recommends:

• Less than 2,000 mg of sodium per day (about 5 g of salt)

• Aim for packaged foods with less than 120 mg of sodium per 100 g

• Up to 300 mg per 100 g is acceptable for some items, but the lower, the better

Over time, your taste buds will adjust. Just like with sugar and fat, you can retrain your palate to prefer less salty flavours. Many people report enjoying food more once they’ve reduced excess salt.

Natural Ways to Support Healthy Blood Pressure

A low-sodium diet is a great start, but some foods also offer extra protection. These options have been shown in studies to help regulate blood pressure:

• Ground flaxseeds - rich in omega-3s and lignans, with blood pressure-lowering effects

• Raw vegetables - especially those high in potassium, like capsicum and carrots

• Watermelon - contains L-citrulline, which supports vascular health

• Legumes - fibre and potassium-rich, and linked to lower blood pressure

• Raisins - small amounts may support blood vessel flexibility

• Nitrate-rich foods - like beetroot, rocket, and coriander, which support nitric oxide production and improved circulation

Bottom Line: Salt Affects More Than Just Your Blood Pressure

Even if you don’t have hypertension now, excessive sodium affects your cardiovascular system in more subtle ways, stiffening arteries, suppressing antioxidants, and contributing to long-term inflammation.

The good news? Even small, gradual reductions in salt can make a difference. You’ll feel better, your blood vessels will thank you, and your taste buds will quickly adjust.

Start small:

• Cook more meals at home

• Taste your food before adding salt

• Check food labels

• Embrace herbs, spices, garlic, and citrus as flavourful alternatives