Key result
Higher aromatic amino acid intake is linked to ~16% higher risk of incident hypertension.
Why the study?
Prospective evidence linking dietary aromatic amino acids—including phenylalanine, tyrosine, and tryptophan—to incident hypertension remains limited, particularly regarding their individual components and food sources.
Does higher dietary intake of aromatic amino acids increase the risk of incident hypertension in Chinese adults without baseline hypertension?
Cohort (n=10,087)
Yes
Does higher dietary intake of aromatic amino acids increase the risk of incident hypertension in Chinese adults without baseline hypertension?
Higher dietary intakes of phenylalanine and tryptophan (particularly from plant/cereal sources) are consistently associated with an increased risk of incident hypertension in Chinese adults, whereas tyrosine shows no clear association and total AAA intake is subject to regional confounding.
Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“10,087 adults, but no simple verdict against protein. A prospective Chinese cohort recorded 3,531 new hypertension cases. The highest versus lowest intake of aromatic amino acids was associated with a 16% higher hazard (HR 1.16; 95% CI 1.03-1.31). (1/5)”
“After additional adjustment for province, the estimate fell to 1.10 (0.97-1.24), no longer clearly different from no association. Diet was estimated from recalls, and unmeasured dietary and regional factors could confound results. (2/5)”
“Food patterns and context matter. These data do not show that avoiding protein or amino acids prevents hypertension. Full breakdown coming on the Health Longevity Secrets podcast (4/5)”
Observed association should not change practice; hypothesis-generating and extends prior cohort data on aromatic amino acids.
Background Prospective evidence linking dietary aromatic amino acids (AAAs), including phenylalanine (Phe), tyrosine (Tyr), and tryptophan (Trp), to incident hypertension currently remains limited, particularly regarding their individual components and food sources. Herein, we examined the association between dietary AAAs, their food sources, and incident hypertension among Chinese adults. Methods Using the China Health and Nutrition Survey database, this prospective cohort study collected data from 10,087 adults without hypertension at baseline. Baseline dietary intake was assessed using three consecutive 24-h dietary recalls, combined with household food weighing; the energy-adjusted AAA intake was expressed in g/1,000 kcal. Incident hypertension was defined as measured blood pressure, physician diagnosis, or use of antihypertensive medication. Mixed-effects Cox proportional hazards models with household identifiers as random intercepts were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs). Dose–response, food-source-specific, subgroup, and sensitivity analyses were performed. Results During the 95,153 person-years of follow-up, 3,531 participants developed hypertension. In fully adjusted models, the highest quartile of total AAA intake was associated with a modestly higher risk of incident hypertension compared with the lowest quartile (HR, 1.16; 95% CI, 1.03–1.31; P for trend = 0.006). Positive associations were more consistent for Phe (HR for Q4 vs. Q1, 1.26; 95% CI, 1.11–1.44) and Trp (HR, 1.29; 95% CI, 1.14–1.46) individually, while Tyr intake showed no significant association with hypertension. Dose–response analyses indicated approximately linear positive associations for total AAA, Phe, and Trp. The association for total AAA was attenuated following additional adjustment for baseline province (HR for Q4 vs. Q1, 1.10; 95% CI, 0.97–1.24), while the positive associations for Phe and Trp persisted. Cereals were the predominant contributors to AAA intake, and plant-derived Phe and Trp were positively associated with the risk of hypertension. Conclusion Higher dietary intakes of Phe and Trp showed consistent positive associations with incident hypertension, while Tyr showed no clear association. The modest association for total AAA was attenuated after adjusting for baseline province and should therefore be interpreted cautiously in relation to potential regional confounding factors. These findings support the component-specific interpretation of dietary AAAs and consideration of their regional and food source contexts.
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Gong et al. (2026) conducted a cohort in Free of hypertension at baseline (n=10,087). Highest quartile (Q4) of dietary aromatic amino acid (AAA) intake (phenylalanine, tyrosine, and tryptophan) vs. Lowest quartile (Q1) of dietary aromatic amino acid intake was evaluated on Incident hypertension (defined as measured blood pressure, physician diagnosis, or use of antihypertensive medication) (HR 1.16, 95% CI 1.03-1.31, p=0.006 for trend). Higher dietary aromatic amino acid intake (Q4 vs Q1) was associated with a modestly higher risk of incident hypertension (HR 1.16, 95% CI 1.03-1.31; P for trend=0.006) in Chinese adults.
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