Most fizzy vitamin C tablets contain more "salt" than two packets of crisps

New research into the sodium content of Vitamin C Effervescent Tablets

Despite almost 60 per cent of people stating they take vitamin C effervescent tablets to help boost immunity, combat the common cold or give them more energy, a staggering 85 per cent are unaware that their daily tablet contains sodium. “While a vitamin C effervescent is a popular way to consume higher doses of vitamin C, the high level of sodium outweighs the benefits”, says Dr Sarah Brewer. “Unfortunately, sodium has traditionally been used as the reactant, causing your tablet to fizz.”

Salty Facts


Adults should consume no more than 2.4g sodium per day, which is equivalent to 6g salt: Salt = sodium x 2.5.
"Heart problems are a common side effect of a diet too high in salt. Too much salt will raise your blood pressure, which can lead to heart disease, stroke and heart attack"
Dr Sarah Brewer

Salt, also known as sodium chloride, is a compound made up of sodium (40%) and chlorine (60%).

The Results

Sodium Content Per Vitamin C Tablet

Compared to an average bag of ready salted crisps

The average sodium content of each tablet was the equivalent of 2.1 bags of crisps!

2.1 bags of crisps equates to 17% of a person’s upper daily limit.

Effervescent tablets do not contain salt but do contain sodium – too much of which is bad for your heart.

Should we stop taking Vitamin C Tablets?


Only 27% of adults aged 19-64 meet the 5-a-day recommendation for fruit and vegetables, the main source of vitamin C.

To get the same amount of vitamin C as an effervescent tablet, you would need to eat 12 per day.

Rather than banishing vitamin C tablets altogether, be sure to check the labels and choose a supplement that contains less than 1% of your daily RDA of sodium.