TikTok Is Cueing Teen Appetites — and Influencer Clips Beat Ads

A new study found that TikTok may significantly influence what teenagers are eating, based on the frequency and type of clips promoting food products. Conducted by researchers at the University of Minnesota and published in the Journal of Nutrition Education and Behavior, it concludes TikTok plays a key role in showcasing food trends and influencing teen diets.

Scope: 25 students, four focus groups

The study drew on feedback from four focus groups of 25 students aged 15 to 16 at a Midwestern high school in the U.S. The scope is limited — but the results point to the value of food promotions in the app and the influence TikTok can hold over consumer decisions.

The small sample matters for interpretation. This is qualitative exploratory work, not a quantitative causal estimate.

The exposure environment

The report starts with how often food shows up.

"Although research examining TikTok's impact on dietary intake remains nascent and individual users' exposure varies, food-related content is highly viral. TikTok's food page on the explore tab reveals countless user-generated and sponsored videos, each garnering millions of views (i.e., the #food page alone surpassed 270 billion cumulative views in March 2022). As a result, food content may appear on adolescents' algorithmically curated For You page multiple times an hour, as one study found adolescents can be exposed to >17 food ads for each hour on the internet."

The finding: influencer clips outperformed ads

The study found food ads on TikTok prompted desire for the foods displayed. The more notable result comes next: influencer-created TikTok clips had an even bigger impact on increasing desire for specific food items.

"[A]dolescents in our racially and ethnically diverse sample also preferred professional-looking ads featuring influencers, with trust in the influencer shaping appreciation of the content," the report said.

Two factors stack there — production quality (it looked professional) and personal trust (they believed the influencer). Neither alone appears sufficient.

The proposed mechanism: immediacy

The report offers a hypothesis for why.

"The immediacy of wanting to consume foods and try new foods that appeared appetizing on TikTok may relate to the activation of attention and reward-related brain regions, potentially interfering with impulse control. The immediacy may also be amplified by the platform's persuasive design and the frequency of food-related ads."

Whether that desire converts into eating is a separate question. The report's own framing: "Food-related TikToks can influence adolescents' eating by cueing appetite, but the context of the TikTok, their trust in the TikToker/influencer or comments, and their personal context can either facilitate or prevent food attainment."

Several moderators sit between the cue and the consumption. That comments are named as one is worth noting — the reaction underneath the content participates in the judgment as much as the content does.

Three implications for marketers

1. Influencer-made assets rank higher in food categories. Creator-produced clips outperforming brand ads on desire is an argument for shifting budget from ad production toward creator collaboration. But since "professional-looking" was part of the preference, high-volume low-quality output is not the takeaway.

2. Trust is a precondition, not a bonus. If appreciation of content flows from trust in the influencer, creators with accumulated audience relationships beat one-off placements. On how brands actually weigh creator selection criteria, see Follower Count Ranked Last in How Brands Pick Creators.

3. Marketing to minors needs its own standard. The mechanism this study names touches impulse control. Food marketing aimed at adolescents draws regulatory and public scrutiny in direct proportion to how well it is shown to work. Legislative moves to restrict teen social media use are appearing in multiple countries, and litigation over platform responsibility for youth safety is active. See Meta Goes to Trial Against 29 State Attorneys General.

Evidence of effect is simultaneously a reason to use a channel and a reason to be accountable for using it. Food brands are better off reviewing both in the same document.