Abstract
Observational and clinical studies suggest that high protein intake, particularly protein from plant sources, might reduce blood pressure (BP). To examine the association of dietary protein with BP, we analysed data from PREMIER, an 18-month clinical trial (n=810) that examined the effects of two multi-component lifestyle modifications on BP. We examined the association of protein intake with BP, and in particular the independent relationship of plant and animal protein with BP. Multivariable linear regression analyses were performed with both cross-sectional and longitudinal data. Dietary plant protein was inversely associated with both systolic and diastolic BP in cross-sectional analyses at the 6-month follow-up (P=0.0045 and 0.0096, respectively). Fruit and vegetable intake was also inversely associated with both systolic and diastolic BP cross-sectionally at 6 months (P=0.0003 and 0.0157, respectively). In longitudinal analyses, a high intake of plant protein at 6 months was marginally associated with a reduction of both systolic and diastolic BP from baseline to 6 months only (P=0.0797 and 0.0866, respectively), independent of change in body weight and waist circumference. Furthermore, increased intake of plant protein, and fruits and vegetables was significantly associated with a lower risk of hypertension at 6 but not at 18 months. Results of this study indicate that plant protein had a beneficial effect on BP and was associated with a lower risk of hypertension at 6 months. Our data, in conjunction with other research, suggest that an increased intake of plant protein may be useful as a means to prevent and treat hypertension.
Generated Summary
This study, published in the Journal of Human Hypertension, examines the relationship between dietary protein intake and blood pressure using data from the PREMIER study, an 18-month clinical trial. The research investigates the association of protein intake with blood pressure, with a specific focus on the independent relationships of plant and animal protein. The study employs multivariable linear regression analyses, analyzing cross-sectional and longitudinal data to assess the effects of dietary protein on systolic and diastolic blood pressure. The aim is to determine the impact of plant protein intake on blood pressure reduction and assess its potential in preventing and treating hypertension. The methodology involves analyzing data from a clinical trial, focusing on how different types of protein intake (plant vs. animal) correlate with blood pressure changes over time and at different points in the study.
Key Findings & Statistics
- The study analyzed data from the PREMIER trial, which included 810 participants.
- In cross-sectional analyses at the 6-month follow-up, dietary plant protein was inversely associated with both systolic and diastolic blood pressure (P = 0.0045 and 0.0096, respectively).
- Fruit and vegetable intake was also inversely associated with both systolic and diastolic blood pressure cross-sectionally at 6 months (P = 0.0003 and 0.0157, respectively).
- In longitudinal analyses, a high intake of plant protein at 6 months was marginally associated with a reduction of both systolic and diastolic blood pressure from baseline to 6 months only (P = 0.0797 and 0.0866, respectively).
- Increased intake of plant protein, fruits, and vegetables was significantly associated with a lower risk of hypertension at 6 months.
Other Important Findings
- The study found an inverse relationship between dietary plant protein intake and both systolic and diastolic blood pressure in cross-sectional analyses at the 6-month follow-up.
- Fruit and vegetable intake was also inversely associated with systolic and diastolic blood pressure at the 6-month mark.
- Longitudinal analyses suggested that a higher intake of plant protein at 6 months was linked to a reduction in both systolic and diastolic blood pressure, although this association was marginal.
- Increased consumption of plant protein, fruits, and vegetables was significantly associated with a lower risk of hypertension at the 6-month mark.
Limitations Noted in the Document
- The study’s longitudinal findings regarding the association of plant protein with blood pressure reduction were only marginally significant, suggesting a need for cautious interpretation.
- The study did not specify any limitations.
Conclusion
The results of this study suggest that plant protein intake may have a beneficial effect on blood pressure and could potentially reduce the risk of hypertension. The findings, when considered alongside other research, indicate that increasing the consumption of plant protein might be a useful strategy for preventing and treating hypertension. The significant associations found between plant protein intake and reduced blood pressure, as well as the lower risk of hypertension at 6 months, support the idea that dietary modifications, particularly those involving plant-based protein sources, can play a role in cardiovascular health. This study underscores the importance of considering dietary choices, such as plant protein consumption, as part of a broader approach to managing and preventing hypertension. Further research could explore the optimal levels and types of plant protein for maximizing these benefits and to evaluate any long-term impacts.