VERDICT: FALSE The specific number in the TikTok claim — humanity containing "about 1.1 trillion calories in total" — does NOT check out. Primary-source data puts the total caloric content of all humans at roughly **1.1 quadrillion kcal (≈1,100 trillion kcal)**, about **1,000× more** than the claimed figure. The claim appears to be a garbled version of a real factoid ("~1.1 quadrillion kcal"), with the scale word mangled from quadrillion to trillion. **Claim-linked findings:** 1. **Per-body caloric content (peer-reviewed primary source):** James Cole, "Assessing the calorific significance of episodes of human cannibalism in the Palaeolithic," *Scientific Reports* 7:44707 (2017) — published by Nature and archived in full text on NIH PubMed Central — presents a nutritional template from published chemical-composition analyses of four adult human cadavers. Its Table 1 gives the average adult human body (65.99 kg) a total calorific value of **143,771.33 calories**, and the routinely-consumed body components (55.26 kg) **125,822.25 calories** (skeletal muscle alone ≈ 32,375.5). The paper's own reference figure of 2,400 "calories" per day for an adult male's energy expenditure confirms these are dietary kilocalories (kcal). - https://www.nature.com/articles/srep44707 - https://pmc.ncbi.nlm.nih.gov/articles/PMC5382840/ 2. **World population (intergovernmental primary source):** The World Bank's official data API (indicator SP.POP.TOTL, sourced from the UN World Population Prospects) returns a 2025 world population of **8,215,424,893** and 8,140,897,523 for 2024; the UN DESA "World Population Prospects 2024: Summary of Results" publication likewise reports ~8.2 billion in 2024. - https://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL?format=json&date=2024:2025&per_page=10 - https://desapublications.un.org/publications/world-population-prospects-2024-summary-results 3. **The arithmetic (why 1.1 trillion fails):** Multiplying the UN population figure by Cole's per-body values gives ≈ **1.03–1.18 × 10¹⁵ kcal** (8.2 billion × 125,822 ≈ 1.03 quadrillion; 8.2 billion × 143,771 ≈ 1.18 quadrillion) — i.e., about **1,034–1,181 trillion kcal**. A total of "1.1 trillion kcal" would imply each human contains only ~134 kcal (less than a single apple), which is irreconcilable with the published body-composition data above. Even being conservative about children and body-weight differences, the true figure sits in the high-hundreds-of-trillions to ~1 quadrillion kcal range — not 1.1 trillion. **Bottom line:** The underlying idea (humanity's stored energy is a real, computable, staggeringly large number) is grounded in genuine research, and "**1.1 quadrillion** kcal" roughly checks out — but "**1.1 trillion**" is off by a factor of ~1,000, so the claim as stated is false rather than "roughly" correct.