Fast Food and Public Health

Rising levels of obesity and diet-related diseases have led many to propose high taxes on unhealthy food and drinks. While fiscal measures can be a powerful public health tool, relying heavily on taxation alone is neither fully effective nor entirely fair. I therefore partly agree with this approach, but only as one element in a broader strategy.

Supporters of a so-called “fat tax” argue that higher prices discourage consumption, just as tobacco taxes have reduced smoking. There is some evidence for this: in countries that have introduced sugar taxes, such as Mexico and the UK, sales of sugary drinks have fallen and manufacturers have reformulated products to contain less sugar. From this perspective, a substantial tax can shift both consumer behaviour and corporate practice, making unhealthy options less attractive and healthier ones more competitive.

However, heavy taxation also has clear drawbacks. First, it is inherently regressive, hitting low-income families hardest, as they spend a larger proportion of their income on food. If healthier options remain relatively expensive or inaccessible, a tax simply increases financial pressure without significantly improving diets. Second, defining “unhealthy” food is complex. A blanket tax risks oversimplifying nutrition, penalising some items that can be acceptable in moderation while failing to address broader lifestyle factors such as physical inactivity, stress, and long working hours, which also contribute to obesity.

For these reasons, taxation should be used cautiously and in combination with other measures. Any revenue raised could be ring-fenced for subsidising fresh produce, improving school meals, and funding clear front-of-pack labelling and public education campaigns. Urban planning that encourages walking and cycling, along with workplace wellness programmes, would address the root causes more holistically than price signals alone.

In conclusion, I agree that targeted taxes on clearly harmful products, especially sugary drinks, can play a useful role. Nevertheless, they should form part of a comprehensive, equity-focused public health policy rather than being treated as a stand-alone solution.