Why Salt is The Most Misunderstood Mineral on Earth

Sodium vs Salt - They’re not the same thing

Salt is a chemical compound called sodium chloride (NaCl) - around 40% sodium and 60% chloride by weight (WHO, 2023).
 

Sodium is the active mineral your body uses for:

• Nerve signalling
• Muscle contraction
• Fluid balance
• Nutrient absorption
   

Food labels usually list sodium, even when the ingredient is actually salt - because sodium is the part that affects your physiology.

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How can you have low-sodium salt?

Manufacturers swap some of the sodium chloride for potassium chloride (or occasionally magnesium salts), reducing the overall sodium content without completely changing the taste (He & MacGregor, 2009).

Example:

It’s a neat way to support heart health if your diet is high in sodium — but anyone with kidney disease or who takes potassium-retaining medications needs medical advice first because extra potassium can be risky if your kidneys can’t clear it efficiently. (NICE, 2022).

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Why Some Salt Is “Healthy” and Others “Bad”

Honestly, marketing plays a bigger role than chemistry.

75% of UK sodium comes from processed foods, not the salt you add to dinner (Public Health England, 2020).

So the difference isn’t mystical - it’s about quantity and context, not colour or crystal size.

Salt’s Crucial Role in Hydration and Health

Salt (sodium + chloride) is vital for life. Without it, cells can’t maintain fluid balance or electrical communication. Here’s what it does:

• Hydration: Sodium helps water move across cell membranes. Without enough sodium, drinking lots of water can actually dilute your blood, leading to hyponatraemia — dangerous low sodium levels.
• Nerve signalling: Sodium ions enable electrical impulses — every heartbeat, muscle contraction, and thought relies on sodium/potassium exchange.
• Blood pressure regulation: Sodium attracts water. Too much increases fluid volume (and BP); too little and your pressure can drop dangerously.
• Nutrient absorption: Sodium helps transport glucose and amino acids in the gut — essential for energy uptake.
   

Essentially, salt allows water to be used properly by the body — it’s not just about drinking water; it’s about holding onto it in the right places.

Salt Enables Proper Hydration

Hydration is water + electrolytes working together.

Why sodium is necessary for hydration:

• Water follows sodium into cells → balanced fluid levels
• Low sodium + too much water → hyponatraemia, fatigue, confusion, even seizures (Verbalis, 2010)
• Sodium helps transport glucose and amino acids → better energy usage (Gropper & Smith, 2020)

No sodium = No usable hydration. No muscle function. No heartbeat.

(A little dramatic, but scientifically correct)

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How Much Salt Do We Actually Need?

According to UK guidelines:

• Max recommended: 6 g of salt/day
  (~2.4 g sodium) (NHS, 2024)
   

Most adults exceed this through:

• Bread
• Ready meals
• Fast food
• Condiments & sauces
   

A simple rule: Season food at home without fear - just cut down the processed stuff.

What’s the difference between salt and sodium?
Salt = sodium chloride (NaCl). Sodium is the active mineral your body uses for hydration, nerves, and muscles.

Why do we need sodium?
It helps your body absorb water, supports nerve signals, maintains blood pressure, and enables muscles to function.

How can salt be low-sodium?
Some sodium is replaced with potassium chloride to reduce sodium intake while keeping flavour.

Is Himalayan/sea salt healthier?
Not really - trace minerals are tiny, not enough to change your health.

How much salt should we have in the UK?
Recommendation: ≤6 g salt/day (2.4 g sodium).

Want to Know Your Sodium Status?

If you’re experiencing:

• Fatigue
• Cramps
• Low mood
• Dizziness
• Over-hydration issues
• Dehydration despite drinking loads of water

A blood test can help you understand electrolyte and kidney balance.

Vitall’s Total Health Check includes:
✔️ Sodium
✔️ Potassium
✔️ Chloride
✔️ Kidney markers
+ Loads more!

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Actionable insights - not guesswork.

Because hydration isn’t about how much you drink - but how well your body uses it.