What These Apps Can Do—and What They Can’t Replace
A score and a color-coded rating provide a quick indication, but a balanced diet isn’t limited to the quality of a single food item. It also depends on how often you eat it, the actual amounts consumed, and the importance you place on the pleasure of eating. Reducing these factors to a single score remains a simplistic approach.
These tools also require particular caution among people prone to excessive food control: the systematic pursuit of a perfect score can reinforce problematic eating behaviors rather than alleviate them.
The Limitations of the Scoring Model
Focusing on the most widely used app, Yuka, several blind spots become apparent, which limit its ability to assess a product’s quality on its own:
- the total amount of fat is not indicated;
- the type of sugars (added or naturally occurring) is not specified;
- the list of ingredients is not available within the app;
- vitamin and mineral content is not visible;
- calorie counts are not based on the actual amounts consumed;
- information on additives is not always reliable;
- the degree to which the food has been processed is not factored into the score calculation.
The Risks of a Diet Dominated by Poorly Rated Products
A diet consisting mainly of products with low nutritional quality and high in additives is associated with several health risks, including:
- cardiovascular disease;
- obesity;
- diabetes;
- certain cancers.
The brain itself appears to be particularly susceptible to the effects of junk food, although the precise mechanisms remain to be clarified.
What Science Doesn’t Say (Yet)
The guidelines defining a balanced diet are not based on as solid a scientific foundation as one might think: these concepts have been influenced for decades by the interests of the food industry. Our understanding is also constantly evolving, particularly regarding the interactions between diet and the gut microbiome, the effects of ultra-processed foods, and the effects of food additives—all areas that are still poorly understood. Many of the certainties touted today are based more on beliefs than on established knowledge: what is presented as true today may be revised tomorrow.
Rediscovering Sound Nutritional Guidelines
Our eating habits say a lot about our relationship with food. Restoring value to food, to the ritual of meals, and to seasonality—by taking the time to cook with products from sustainable, locally sourced agriculture—remains one of the best ways to rediscover sound nutritional guidelines. Reflecting on the environmental impact of one’s food choices is part of the same approach. When used occasionally and integrated into a broader strategy, well-designed apps can provide additional support—but they should never be a substitute for professional guidance.
Consulting with a dietitian remains the most reliable way to assess your eating habits: a comprehensive assessment usually takes only about sixty minutes.
Frequently Asked Questions
Can you rely solely on a food-scanning app to eat well?
No. A balanced diet also depends on how often you eat certain foods, the actual quantities, and the enjoyment you get from eating—aspects that a score alone doesn’t capture.
Why isn’t Yuka’s score enough to judge a food?
Because it doesn’t take several key factors into account: fat content, types of sugars, ingredient list, vitamins and minerals, or the degree of processing.
Can these apps be problematic for some people?
Yes, particularly for people prone to excessive food control, for whom the pursuit of a perfect score can reinforce problematic eating behaviors.
What is the most reliable alternative for evaluating your diet?
A consultation with a dietitian, which generally takes only about 60 minutes.