Eat fewer ultra-processed foods (chips, instant noodles, pastries, ready meals)
Original: eternity4719 · source details
Original author: eternity4719 · Chinese source: · English adaptation: parveen0029. Translation and grade notes ↗
Bibliographic titles are retained in their original language.
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Cost and benefit at a glance
- Check the cost Cost ↓
- There’s no direct monetary cost, but you’ll need to spend time cooking or selecting minimally processed ingredients every day. The real challenge is overcoming …
- Then the source benefit Benefit ↓
- One systematic review combined data from multiple studies, even though those original studies did not group participants by ultra-processed food intake. The results showed that peo…
In plain terms
People who consume the most ultra-processed foods have a roughly 20% higher risk of dying during the study period compared to those who eat the least, and a 50% higher risk of dying from cardiovascular disease. However, this evidence is rated as low certainty, so these figures should be interpreted with caution.
This guide's cartoon · show illustration
Enlarge illustrationOriginal illustration with Chinese lettering; the English dialogue is below. Humour is a reading aid, not evidence.
English dialogue
- I take health seriously!
- What does your average day look like?
Cost: what it takes
There’s no direct monetary cost, but you’ll need to spend time cooking or selecting minimally processed ingredients every day. The real challenge is overcoming the long-standing habit of choosing convenience over health.
Benefit: what the source reports
One systematic review combined data from multiple studies, even though those original studies did not group participants by ultra-processed food intake. The results showed that people eating more ultra-processed foods had a 21% higher risk of death (RR 1.21) and a 50% higher risk of cardiovascular death (RR 1.50) compared to those eating less. These findings are classified as “highly suggestive” and “convincing” respectively. Yet when assessed using the standard GRADE criteria, the overall certainty of this evidence is low or very low.
Conditions, limits and disagreements
There are three main points of debate here. First, the NOVA classification groups foods with vastly different nutritional profiles into the same category. Second, ultra-processed foods overlap heavily with sugary drinks and processed meat (see items 7 and 18), so it’s hard to isolate which factor is responsible for the observed effects. Third, GRADE ratings for this evidence are also low. Therefore, it’s unclear how much additional benefit this recommendation provides after following the other two. The opposing evidence comes from the same review’s low GRADE rating; no original studies have produced contradictory results to date. For now, focus on following items 7 and 18 — avoiding sugary drinks and limiting processed meat — before placing much emphasis on this recommendation.
Original references
Original bibliographic titles and links are preserved; some titles are in Chinese.
Lane MM 等 (2024). Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses. BMJ. https://doi.org/10.1136/bmj-2023-077310
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