chia seed and Reduced Diastolic Blood Pressure

Research synthesisLow evidenceMixed effect size3 studies · 2 beneficial · 1 neutral · 0 harmful

Across 3 studies, 2 reported beneficial effects on diastolic blood pressure, with effect sizes ranging from moderate to large, while 1 study found no effect. The median study duration was 70 days. Doses of 30–50 g/day were studied, but results were inconsistent across doses and populations.

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. The single neutral study (2009) with a higher dose (50 g/day) found no effect on blood pressure, contrasting with the beneficial effects seen in the meta-analysis and a smaller 2024 trial (30 g/day). This inconsistency suggests the effect may be dose-dependent or influenced by population characteristics.

Generated Jul 9, 2026

Doses used in studies

g/day: 30–50 (median 40, IQR 35–45) — 2 studies

Time to effect

Median: 10 weeks · IQR 9 weeks–11 weeks · Range 8 weeks–2.8 months — Reported in 2 of 3 studies

3 of 3 papersPopulation:

A Critical Review of the Health Benefits Associated with Chia Seeds (Salvia Hispanica L.).
- 2025-10-12
- Meta-Analysis · n = 500
- Plant foods for human nutrition (Dordrecht, Netherlands) 80(4)
- - Zena Kadhim Al-Younis
  - Sarmad Ghazi Al-Shawi
  - A K Kareem
  - Safia Obaidur Rab
  - Renuka Jyothi S
  - Swati Mishra
  - Ashish Singh Chauhan
  - Udaybir Singh
  - Ahmad Hossen
  - Ahmed Mohammed Ahmed
- PubMed: 41076614
- DOI: 10.1007/s11130-025-01401-z
8 Insights on
- Reduced Diastolic Blood Pressure
- High evidence
Chia supplementation resulted in significant reductions in diastolic blood pressure (g = -0.550; 95% CI: -0.718 to -0.382)
Effect
Beneficial
Effect size
Moderate
Significant
Yes
Chia seed does not promote weight loss or alter disease risk factors in overweight adults.
- 2009-06
- RCT · n = 76
- Nutrition research (New York, N.Y.) 29(6)
- - David C Nieman
  - Erin J Cayea
  - Melanie D Austin
  - Dru A Henson
  - Steven R McAnulty
  - Fuxia Jin
- PubMed: 19628108
- DOI: 10.1016/j.nutres.2009.05.011
14 Insights on
- Reduced Diastolic Blood Pressure
- High evidence
- Mixed
Pre-to-post measures of body composition, inflammation, oxidative stress, blood pressure, and lipoproteins did not differ between CS and P for both sexes.
Effect
Neutral
Effect size
Small
Significant
No
Dose
50 g/day
Effect of chia seeds or concentrated fish oil on cardiometabolic risk markers in subjects with hypertriglyceridaemia: a parallel clinical trial.
- 2024-10-03
- RCT · n = 22
- Journal of human nutrition and dietetics : the official journal of the British Dietetic Association 37(6)
- - Mohammad Reza Shahparvari
  - Javad Nasrollahzadeh
- PubMed: 39360590
- DOI: 10.1111/jhn.13369
3 Insights on
- Reduced Diastolic Blood Pressure
- High evidence
- Clinical
The consumption of chia seeds was associated with a reduction in diastolic blood pressure (change from baseline mean: 8.4 mmHg) compared to the other two groups.
Effect
Beneficial
Effect size
Large
Significant
Yes
Dose
30 g/day

chia seed and Reduced Diastolic Blood Pressure

A Critical Review of the Health Benefits Associated with Chia Seeds (Salvia Hispanica L.).

Chia seed does not promote weight loss or alter disease risk factors in overweight adults.

Effect of chia seeds or concentrated fish oil on cardiometabolic risk markers in subjects with hypertriglyceridaemia: a parallel clinical trial.