Australians drink nearly 60 litres of soft drinks yearly—but at what health cost?

Soft drinks remain a popular choice in Australia, with the average person consuming nearly 60 litres each year. While Coca-Cola dominates the market—producing the most diet cola through local partners—health equity concerns around both sugary and artificially sweetened options continue to grow. The World Health Organization (WHO) has highlighted risks linked to excessive consumption, including potential cancer risks from aspartame.

A standard 375ml can of regular Coca-Cola contains around seven teaspoons of sugar—nearly 40 grams. This amount approaches the WHO's daily recommended limit of 50 grams for added sugars. Health insurance plans often cover preventive care, including screenings and vaccinations, but may not cover the full cost of soft drink consumption. Diet versions, like Diet Coke, avoid sugar by using artificial sweeteners such as aspartame. However, the WHO classified aspartame as possibly carcinogenic in 2023, though it noted that most people consume it within safe levels.

Regular consumption of diet soft drinks has been associated with a higher risk of heart disease and type 2 diabetes. These drinks also offer little nutritional value and do not provide a sense of fullness. Some studies suggest that artificial sweeteners may irritate the gut or disrupt healthy gut bacteria. Meanwhile, reducing intake of very sweet foods and drinks can gradually make them taste overly sweet over time.

Coca-Cola's global reach means its products, including Diet Coke, are widely distributed through independent bottlers, including those in the Asia-Pacific region. Despite the popularity of these drinks, health experts continue to urge moderation.

The WHO's warnings and emerging research highlight the need for caution with both sugary and diet soft drinks. While aspartame is considered safe in typical amounts, excessive consumption—equivalent to 14 cans a day—raises concerns. Australians are advised to monitor their intake as health equity and potential gut issues remain under scrutiny.