Spirulina Lowers Blood Pressure and Supports Heart Health
Dr. Joseph Mercola - Take Control of Your Health
Briana Mercola
4.6 • 1.6K Ratings
🗓️ 9 October 2025
⏱️ 7 minutes
🧾️ Download transcript
Summary
- Spirulina, a blue-green algae once used by ancient cultures as food, has been proven in modern research to significantly lower blood pressure
- Consuming at least 3 grams of spirulina daily for eight to 12 weeks reduces both systolic and diastolic pressure, with whole spirulina working better than extracts
- People over 50, those who are overweight, and adults already dealing with high blood pressure experience the strongest benefits from regular spirulina use
- Spirulina works by improving blood vessel flexibility, boosting nitric oxide production, and protecting arteries from oxidative stress and inflammation
- Safe and natural, spirulina is generally well tolerated, but it should be avoided if you're allergic to seafood or iodine, pregnant, or nursing
Transcript
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| 0:00.0 | Could you lower your blood pressure in 8 to 12 weeks with a simple daily habit that also supports healthier arteries and steadier circulation? |
| 0:08.3 | Welcome to Dr. Mercola's cellular wisdom. |
| 0:11.2 | Stay informed with quick, easy-to-listen summaries of our latest articles, perfect for when you're on the go. |
| 0:16.6 | No reading required. |
| 0:17.9 | Subscribe for free at Mercola.com for the latest health insights. |
| 0:21.8 | Hello, and welcome to Dr. Mercola's cellular wisdom. |
| 0:25.7 | I'm Ethan Foster. |
| 0:27.8 | Today we're examining evidence that spirulina, a blue-green algae used as food for centuries, |
| 0:33.9 | can measurably reduce both systolic and diastolic pressure |
| 0:37.4 | when you use the right dose for long enough. |
| 0:40.0 | I'm Alara Sky. |
| 0:41.6 | Modern trials show spirulina is more than a nutrient-dense supplement. |
| 0:45.8 | It's a targeted strategy for cardiovascular support. |
| 0:49.6 | Research links it to improved blood vessel flexibility, greater nitric oxide availability, and protection |
| 0:55.7 | against oxidative stress and inflammation. Three levers that directly influence how forcefully |
| 1:01.6 | blood presses against your artery walls. Let's start with the big picture. A systematic review |
| 1:07.8 | of 29 randomized controlled trials covering 1,583 adults found edible algae |
| 1:14.4 | reliably lowered blood pressure and spirulina produced the strongest, most consistent effects. |
| 1:21.0 | Drops of several millimeters of mercury may sound small, but sustained reductions of even |
| 1:25.5 | two to five millimeters of mercury translate to meaningful reductions |
| 1:29.7 | in stroke and heart disease risk over time. Consistency and dosing mattered. Benefits were |
| 1:35.7 | greatest when people consumed at least three grams per day for eight to 12 weeks, with the most |
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