Flaxseed and blood pressure
What 3 graded rows on flaxseed agree on for blood pressure, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Flaxseed page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Flaxseed page, with its PubMed record.
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Flaxseed and blood pressure
3 rows · 3,746 peopleThey agree: all 3 rows found an improvement.
- BGrade B× 3
- Rows
- 3
- Trials
- 52
- People
- 3,746
- Pooled reviews may count some twice
What the rows share
From the rowsThe best-graded row, grade B, is a meta-analysis of 2,427 people (2023) and found an improvement.
The rows run from 110 to 2,427 people, published from 2013 to 2025: 2 pooled reviews and 1 single study.
The rows
3 improved- BGrade BSystolic and diastolic blood pressure · Improved
Meta-analysis, 33 studies · n 2,427 · 2023 · Adults in 33 trials (43 arms) of flaxseed products
Varied; larger effects at 30 g/day or more of flaxseed · Varied; larger effects beyond 20 weeks
Systolic BP fell 3.19 mmHg (95% CI −4.15 to −2.24) and diastolic 2.61 mmHg (−3.27 to −1.94). Effects were bigger in people with hypertension, at 30 g/day or more and in trials over 20 weeks.
- BGrade BBlood pressure in people with metabolic diseases · Improved
Meta-analysis, 18 studies · n 1,209 · 2025 · Adults with metabolic diseases in 18 trials (22 treatment arms)
Varied across trials · Varied; larger effects in trials of 10–20 weeks
Systolic BP fell 4.30 mmHg (95% CI −6.64 to −1.96) and diastolic 2.50 mmHg (−3.88 to −1.12). Effects were larger with whole flaxseed, in trials of 10–20 weeks, at BMI 25–30 and in people with hypertension.
- BGrade BBlood pressure in hypertensive patients with peripheral artery disease · Improved
RCT · n 110 · 2013 · Adults with peripheral artery disease, many with hypertension (Canada)
30 g/day · 6 months
Systolic BP was about 10 mmHg and diastolic about 7 mmHg lower than placebo; patients starting at 140 mmHg or more saw a 15 mmHg systolic drop. Body weight did not differ.