Fermented plant foods like soy paste and fermented rice have more essential amino acids and beneficial short-chain fatty acids than fermented animal products like fish or dairy, potentially making them more nutritionally valuable for people on plant-based diets.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether plant-based fermented foods consistently contain higher levels of essential amino acids and SCFAs than animal-based fermented foods across diverse preparation methods and regions.
A systematic review and meta-analysis of all published studies measuring SCFA and EAA concentrations in fermented plant foods (soy, rice, mushroom, vegetable) versus fermented animal foods (fish, dairy, meat) using standardized NMR or HPLC methods.
Whether consuming 100g/day of plant-based fermented food increases blood levels of essential amino acids in postmenopausal vegetarians over 8 weeks.
A double-blind RCT of 60 postmenopausal vegetarians (60–75 years) randomized to consume 100g/day of FVG-6 (fermented soybean paste) or a placebo (heat-treated soy paste) for 8 weeks, with fasting blood samples collected at baseline and endpoint to measure plasma EAA levels.
Whether long-term consumption of plant-based fermented foods correlates with higher plasma essential amino acid levels in postmenopausal vegetarians.
A prospective cohort study following 300 postmenopausal vegetarians for 3 years, collecting quarterly dietary records of fermented food intake and fasting plasma samples for EAA quantification, adjusting for total protein intake and supplement use.
Whether postmenopausal vegetarians with high plasma EAA levels are more likely to consume plant-based fermented foods daily than those with low levels.
A case-control study comparing 80 vegetarians with high plasma EAA levels (top quartile) to 80 with low levels, matched for age and protein intake, and assessing daily fermented food consumption over the past 5 years.
Whether plant-based fermented foods have higher SCFA and EAA concentrations than animal-based fermented foods.
A cross-sectional analysis comparing SCFA and EAA concentrations in 20 plant-based fermented foods and 20 animal-based fermented foods using standardized NMR metabolomics.