Adherence
The presence of health claims on food packaging creates a 'halo effect' that increases perceived product healthiness and purchase intent, but simultaneously discourages consumers from reading detailed nutrition information on the back of the package.
If you see a health claim on the front of a package (e.g., 'Heart Healthy'), expect that it will make the product seem healthier and more appealing. However, do not stop there. Turn the package over and read the Nutrition Facts panel. The claim may distract you from high levels of sugar, sodium, or saturated fat that are not addressed by the claim. Use the claim as a filter, not a final verdict.
When a product features a health claim, respondents view the product as healthier and state that they are more likely to purchase it. The effect of health claims on the front of the package was to reduce the likelihood that consumers would read the nutrition information on the back of the package.
Why this rating
Supported by multiple experimental studies (FDA, FTC) and consistent survey data, though causality in real-world purchase is harder to prove than in lab settings.
Source
Consumer Understanding and Use of Health Claims for Foods
Peter Williams · Nutrition Reviews · 2005
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