Best Supplements for Reduced Systolic Blood Pressure
Ranked by research evidence. Compare 70 supplements across 88 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Moderate evidence3 studies
Across 3 studies, all reported beneficial effects on systolic blood pressure, with two meta-analyses showing moderate reductions (e.g., ~3.7 mmHg) and one small RCT finding a significant reduction when co-ingested with dietary nitrate. The predominant effect size is moderate. Evidence primarily comes from adults with type 2 diabetes and general adult populations. Doses and forms were not consistently reported across studies.
- Low evidence3 studies
All 3 studies (all meta-analyses) report that flaxseed supplementation produces a moderate beneficial reduction in systolic blood pressure. The pooled reductions range from -4.30 mmHg to -8.64 mmHg, with effects observed in clinical populations such as patients with metabolic diseases, cardiovascular risk factors, and hypertension. Dose and duration were not consistently reported, and study durations were not extracted.
- Low evidence3 studies
Across 3 studies, 2 reported small beneficial effects of vitamin D on reducing systolic blood pressure, while 1 found no significant effect. A 2025 meta-analysis showed a small but statistically significant reduction (MD: -2.83 mmHg), and a review in obese youths with low baseline vitamin D found a moderate beneficial effect. The evidence base is small and mixed, with benefit potentially limited to those with vitamin D deficiency or specific populations.
Dose: 4000 IU/dayProduct matchViva Naturals — Vitamin D3 with Organic Liquid Coconut Oil125 mcg · $15.16 · ★5.0 (208)
- ModerateVitamin CAcross 3 studies, all reported beneficial effects on systolic blood pressure, with two meta-analyses showing moderate reductions (e.g., ~3.7 mmHg) and one small RCT finding a significant reduction when co-ingested with dietary nitrate. The predominant effect size is moderate. Evidence primarily comes from adults with type 2 diabetes and general adult populations. Doses and forms were not consistently reported across studies.3 beneficial3 studies
- LowflaxseedAll 3 studies (all meta-analyses) report that flaxseed supplementation produces a moderate beneficial reduction in systolic blood pressure. The pooled reductions range from -4.30 mmHg to -8.64 mmHg, with effects observed in clinical populations such as patients with metabolic diseases, cardiovascular risk factors, and hypertension. Dose and duration were not consistently reported, and study durations were not extracted.3 beneficial3 studies
- LowVitamin DAcross 3 studies, 2 reported small beneficial effects of vitamin D on reducing systolic blood pressure, while 1 found no significant effect. A 2025 meta-analysis showed a small but statistically significant reduction (MD: -2.83 mmHg), and a review in obese youths with low baseline vitamin D found a moderate beneficial effect. The evidence base is small and mixed, with benefit potentially limited to those with vitamin D deficiency or specific populations. · Dose: 4000 IU/day2 beneficial1 neutral3 studies
- LowL-CarnitineAcross 3 studies, all reported neutral small-sized effects, showing no significant reduction in systolic blood pressure with L-Carnitine supplementation. The only study reporting duration lasted 56 days, and the most-studied form was L-carnitine-tartrate (1 of 3 studies). Evidence is preliminary and inconsistent.3 neutral3 studies