Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
IsThis

HEALTH

The Claim

Consumption of tomatoes causes inflammation in the human body.

Verified by Lenz ·

The Short Version

The claim that tomatoes cause inflammation is not supported by the scientific evidence. Multiple peer-reviewed studies and systematic reviews show that tomatoes and their key compound lycopene are either neutral or actively anti-inflammatory, reducing biomarkers like CRP and IL-6 in controlled human trials. The only supporting arguments rely on unproven hypotheses about solanine, a study protocol with no published results, and anecdotal reports from specific patient subgroups — none of which establish general causation.

Caveats

  • The main 'supporting' source (Source 4) is a study protocol only — no experimental results have been produced, making it a hypothesis rather than evidence of causation.
  • Claims about nightshade vegetables causing inflammation are largely based on anecdotal patient reports and speculative mechanisms, not validated by controlled human trials.
  • Any potential inflammatory effects of tomatoes appear limited to narrow, unproven subgroup scenarios (e.g., possible gout triggers via uric acid), which do not support a general causal claim.

The Receipts

  1. A New Target in Inflammatory Diseases: Lycopene - PMC - NIH

    PMC - NIH

  2. Tomato Puree Enrichment in a High‐Fat Meal Reduces Postprandial Plasma and Adipose Tissue Inflammation Biomarkers in Healthy Male Adults - PMC

    PMC

  3. Daily intake of a lycopene-rich juice is associated with reductions in inflammatory markers but not increases in skin carotenoids in a pilot study among participants with obesity - PubMed

    PubMed

  4. The evaluation of nightshade elimination diet (NED) on inflammatory and rheumatologic markers of rheumatoid arthritis patients: study protocol for a randomized controlled trial - PMC - NIH

    PMC - NIH

  5. Tomatoes: An Extensive Review of the Associated Health Impacts of Tomatoes and Factors That Can Affect Their Cultivation

    PMC

  6. Lycopene and health: From antioxidant properties to disease prevention - Integrity Research Journals

    Integrity Research Journals

  7. Arthritis: Should You Avoid Nightshade Vegetables? - Cleveland Clinic Health Essentials

    Cleveland Clinic Health Essentials

  8. Are Tomatoes Inflammatory? - Instalab

    Instalab

  9. Nightshade Vegetables: Do They Actually Cause Inflammation? | Inflamous Blog

    Inflamous Blog

  10. The Truth About Nightshades: Are They Bad for You?

    Cleveland Clinic

+ 3 more sources — see the full list on Lenz

Filed Under

tomatoes

More Fact Checks