Vitamin C can Reduce Blood Pressure by up to 20 points. — Key Takeaways
Substack
Vitamin C can Reduce Blood Pressure by up to 20 points.
Dalton (Analyze & Optimize)Jun 8, 2026
Read the originalTake at least 500 mg vitamin C daily for 6+ weeks to reduce systolic blood pressure by up to 5 mmHg — elderly individuals may see reductions as large as 20 mmHg.
Key takeaways
Vitamin C ≥500mg/day for ≥6 weeks drops SBP by 5 mmHg
Vitamin C ≥500mg/day for ≥6 weeks drops SBP by 5 mmHg
- 2020 meta-analysis of 8 RCTs: pooled SBP ↓4.1 mmHg, DBP ↓2.3 mmHg across all studies.
- Dose ≥500mg/day subgroup: SBP ↓5.0 mmHg; duration ≥6 weeks subgroup: SBP ↓4.8 mmHg.
600mg vitamin C daily for 6 weeks cut SBP by 20 points in elderly
600mg vitamin C daily for 6 weeks cut SBP by 20 points in elderly
- Single RCT in elderly subjects using 600mg/day oral vitamin C for 6 weeks showed the largest effect in the meta-analysis.
- Meta-analysis likely underestimates effect: one included study used 3g IV over 5 min — a methodologically incomparable design.
Vitamin C lowers BP by sparing nitric oxide from free radical destruction
Vitamin C lowers BP by sparing nitric oxide from free radical destruction
- Nitric oxide is itself a free radical; excess ROS consumes it. Vitamin C scavenges ROS, preserving NO bioavailability.
- Vitamin C also improves endothelial responsiveness to blood flow changes via anti-inflammatory/antioxidant action.
This Dig holds the full set of insights, 4 flashcards, and 2 quotes — free in Homestake.
Unlock this Dig freeFree forever · No credit card required
In this piece
- Meta-Analysis Overview and Pooled Results
- Subgroup Analysis: Dose, Duration, and Age
- Best vs. Worst Study Comparison and Meta-Analysis Limitation
- Mechanisms: Nitric Oxide Sparing and Endothelial Function
“the meta analysis likely underestimates vitamin C's overall ability to reduce blood pressure.”
This page is a partial, transformative summary produced by Homestake. All rights to the original content remain with its creator — please support them at the source link above.
