A large Japanese study of men and women linked eating three or more bowls of miso soup a day to about 60% higher stomach-cancer risk, while two Japanese studies hinted at lower liver-cancer risk: one result was not statistically significant, and the other was seen only in women with no history of liver disease.
Notes on verification
Multiple peer-reviewed epidemiological studies (JACC study, Wiley IJC study, PMC review) corroborate conflicting associations between miso consumption and different cancer types in Japanese cohorts, though observational nature limits causal certainty.
Sources
- Is Miso Soup Good for You? Benefits, Nutrition & Risks - WebMD (webmd.com)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4728120/ (pmc.ncbi.nlm.nih.gov)
- https://onlinelibrary.wiley.com/doi/10.1002/ijc.20897 (onlinelibrary.wiley.com)
- https://www.researchgate.net/publication/8342188_Dietary_Habits_and_Risk_of_Death_due_to_Hepatocellular_Carcinoma_in_a_Large_Scale_Cohort_Study_in_Japan_Univariate_Analysis_of_JACC_Study_Data (researchgate.net)