Diets
Do low-carb diets shorten your life?
The claim, precisely: low-carbohydrate diet increases all-cause mortality
Unclear — evidence is mixed: animal-based versions look harmful, plant-based protective, from data that can't prove cause.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
What the evidence shows
Observational evidence links low-carbohydrate eating - especially ANIMAL-based - to higher all-cause mortality, with a U-shaped optimum near ~50% carbohydrate; plant-based low-carb substitution is associated with lower mortality. Observational, cannot prove causation, but consistent.
The evidence (5)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Ghorbani 2023 · Ageing Res Rev | meta-analysis | contradicts | moderate | [FT-verified] Dose-resp MA n=421022 overall LCD NS all-cause (HR1.05); cancer-mortality up; weaker than slug |
| Qin 2023 · Food Funct | meta-analysis | contradicts | moderate | [FT-verified] MA n=771609 all-cause RR1.03 NS; CHD RR1.43 sig; I2=86%; supports leans-against on CHD not all-cause |
| Noto H, et al. 2013 · PLoS One | meta-analysis | supports | moderate | MA of cohorts n~272k: low- vs high-carb all-cause mortality RR 1.31 (CVD incidence null) ⚠️ correction-on-file (Crossref) - kept, corrigendum not retraction |
| Seidelmann SB, et al. 2018 · Lancet Public Health | observational | supports | moderate | [FT-verified] FT Seidelmann ARIC U-SHAPED min at 50-55% carb; only ANIMAL-LCD harms, plant-LCD protective; COI Walnut/Dairy funding |
| Seidelmann SB, et al. 2018 · Lancet Public Health | observational | supports | moderate | ARIC cohort + MA >432k: U-shaped mortality; animal-LC HR 1.18, plant-LC HR 0.82 |
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.