Spirulina is a popular supplement made from blue-green algae.
Spirulina is a blue-green algae that’s widely touted as a superfood in the health food and dietary supplement industries. The green powder is known to help lower blood pressure for people with high blood pressure, but there is little scientific evidence that it provides any additional health benefits. Spirulina is generally safe to consume for adults, as long as it’s free of contaminants, such as heavy metals.
What's in Spirulina?According to the U.S. Department of Agriculture , Spirulina contains essential nutrients such as calcium, iron, magnesium, potassium, and sodium. It also contains essential amino acids . Spirulina is also a good source of protein, as it has about the same amount of protein in meat.
"As a registered dietitian, I highly recommend people get their nutrients from foods in a healthy diet [as opposed to relying on dietary supplements] because nutrients work synergistically, and that increases the bioavailability," Mangieri said. Occasionally, Spirulina is touted as having"antioxidant properties." Antioxidants are compounds that help combat cell and DNA damage that leads to cancer, heart disease and other chronic diseases. The body makes some antioxidants, and others are found in food.
Since Spirulina is considered a food, it remains an open question as to whether dried Spirulina in supplements has antioxidant health benefits.
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