Spirulina Benefits and Why This Algae is a Superfood

Spirulina has been used for health benefits for centuries, but today it’s appearing in everything from morning smoothies to high-performance supplement stacks—and scientific research is revealing that the benefits of these algae are more than just social media hype!

Key Takeaways
Today we’ll explore just what spirulina is, what makes it nutritionally beneficial, what current research says about its benefits, and how you can add it to your routine.

Key Terms

• Spirulina—a blue-green algae naturally found in both saltwater and freshwater. Considered a “super food” for its high nutritional value.
• Phycocyanin—a vibrant blue pigment/protein complex that’s found in certain alga. It contributes to photosynthesis in the plant and is known for its antioxidant properties.
• Cyanobacterium—a scientific term describing microscopic blue-green algae found in both soil and water. These bacteria are known for their use of photosynthesis and powerful contribution to Earth’s atmospheric oxygen.
• Spirulina platensis—the scientific designation for what is more commonly called simply spirulina.
• Oxidative stress—damage caused to cells and tissues by an imbalance of free radicals and antioxidants in the body.
• Free radicals—unstable molecules that are released by the body in response to high stress, immune activation, or exposure to certain environmental elements.
• Triglycerides—the most common form of fat found in the body. Triglycerides are formed from unused calories and are stored in fat.

What Is Spirulina?

Spirulina (Spirulina platensis) is a blue-green algae and microalgae classified by scientists as a cyanobacterium due to its coloration and use of photosynthesis. Spirulina has a long history of use, with records indicating that it served as a food source for the ancient Aztec civilization. But this colorful algae’s story isn’t limited to the past, as it has also been utilized as a nutritional supplement for astronauts by NASA. Today, spirulina is the subject of much scientific research, revealing its many benefits to health and wellness.¹

Meet the Blue-Green Algae Behind the Buzz

Displaying a deep blue-green pigmentation (thanks to its natural concentration of phytocyanin), spirulina can be found growing in both fresh water and salt water. From there, it’s harvested and dried before being processed into powder or formed into tablets and capsules for consumption. Thanks to its lack of cellulose cell walls, spirulina is easily digested and provides a high amount of vitamins A and B12, in addition to iron and protein.¹

Spirulina Nutrition at a Glance

Spirulina is a concentrated source of protein, in addition to beta-carotene, potassium, magnesium, fatty acids, and B vitamins.²

Spirulina’s relatively high nutrient density is all the more beneficial as it’s an easily digestible and highly bioavailable ingredient when added to the diet as a supplement.³

What Spirulina Does for Your Body

Antioxidant Protection and Fighting Oxidative Stress

Spirulina’s antioxidant properties have been studied in multiple clinical trials and systematic reviews, with some trials indicating that its phycocyanin provides potent defense against free radicals. While more research is needed, particularly among adult humans, this antioxidant protection can deliver important defense against oxidative stress over time.⁴

Immune System Support

The antioxidant protection delivered by spirulina is also associated with its overall immune system support. Clinical research has found that supplementation with spirulina among active young adults increases immune function while also providing enhanced protection. The results indicate that spirulina helps balance and modulate immune function, even under intense physical activity, and additionally supports a proper immune response to sudden environmental respiratory challenges, including the body’s histamine response.^5,6

Heart Health and Healthy Cholesterol Levels

Multiple meta-analyses and controlled trials have examined spirulina’s effects on blood lipid levels. Results suggest spirulina supplementation may support healthy cholesterol and triglyceride levels already within a normal range. Early research also points to potential benefits for blood pressure levels within the normal range.^7,8

Blood Sugar Support

For those focused on metabolic wellness and carbohydrate management, spirulina supplementation has shown promising effects in various clinical trials. In particular, blood glucose response during fasting has been shown to improve in middle aged adults with blood sugar concerns.⁸ These benefits are seen within the context of those also receiving medical care, so discussion with a doctor is always advised if you have blood sugar concerns.

Gut Health and Diversity

Maintaining a healthy gut microbiome is a crucial element in promoting overall wellness, including immune health and general metabolic vitality. In studies, spirulina has been associated with enhanced microbiome balance between beneficial microorganisms and others. It’s been linked to a proliferation of both probiotics and postbiotics. This benefit appears to exist in both animal and human research.⁹

Weight Management Support

Some research suggests spirulina supplementation may support weight management goals when combined with a healthy diet and activity. This is partly attributed to its high concentration of amino acids and protein, which in turn can support a sense of satiety. In both clinical and preclinical trials involving placebos, obese adults showed measurable improvement after a specified period of spirulina supplementation.^10,11

Supporting Healthy Energy and Vitality

Spirulina’s nutrient density, including its amino acid and B vitamin content, may help fight daily fatigue as these have been linked to enhanced energy metabolism.^11,12 Some research, particularly involving elder patients, also points to spirulina’s potential role in supporting healthy iron levels and reducing fatigue.¹³ This is attributed to its concentration of iron which, when present in sufficient levels in the body, is used to produce red blood cells to transport oxygen more efficiently to tissues.

How to Take Spirulina

Spirulina Powder vs. Supplements

The form of spirulina you choose to take is entirely a matter of preference. Spirulina supplement forms include powders that can be added to smoothies, juices, and food recipes, although you should know that spirulina has been described as having an “earthy” or “seaweed” taste by some.

As an alternative, tablets and capsules offer a tasteless, convenient option. Both deliver the same core benefits.

Dosage and What to Expect

When it comes to taking spirulina, safe daily dosage for adults ranges from 3 g to 10 g, never exceeding 30 g per day.¹⁴ Keep in mind that consistency is more important than seeking quick results. In fact, studies reveal that most of the health benefits delivered by spirulina take approximately two to three months of consistent use to appear.

Adding Spirulina to Your Routine

Adding spirulina to your routine is quick and simple. Swanson offers a variety of spirulina supplements, including easy-to-swallow capsules. There are also powder forms that can be added to your favorite recipe or perhaps incorporated into an invigorating smoothie. For best results, remember to consider spirulina a part of a healthy diet and routine and not simply a cure-all.

What to Know Before You Start

Quality and Safety Considerations

As with all supplements, look for GMP Verified manufacturers with third-party testing and transparent sourcing. This can help ensure you’re getting the purest ingredients, sourced from quality distributers. At Swanson, we’re proud to adhere to strict purity and potency standards as part of our quality guarantee.

Who Should Check with a Healthcare Provider First

As a general rule, anyone who is pregnant, nursing, or taking prescription medications should discuss with their doctor before taking spirulina. It’s always recommended to consult with your healthcare team before adding to or changing your supplement regimen.

Frequently Asked Questions

• What happens if I take spirulina every day?

Spirulina is considered generally safe for daily use by healthy adults. It’s important to only take spirulina within the recommended dosage. With consistent use, spirulina delivers health benefits that include antioxidant defense, bolstered energy, and enhanced immune health.

• Who should not take spirulina?

Children, those who are pregnant or nursing, and those who may be taking certain prescription medications should not take spirulina supplements. Discuss any concerns with your doctor before beginning a spirulina supplement regimen.

• Are there side effects to taking spirulina?

Spirulina supplements are generally well-tolerated, although mild digestive issues may occur when first beginning a daily regimen. To avoid issues, be sure to only take quality spirulina supplements from a trusted and third-party tested manufacturer. For best results, never take more than the recommended dosage of spirulina per day.

• How does spirulina support immune system health?

The antioxidant protection delivered by spirulina is also associated with its overall immune system support. Clinical research has found that supplementation with spirulina among active young adults stimulates immune function while also providing enhanced protection. The results indicate that spirulina helps balance and modulate immune function, even under intense physical activity and additionally supports a proper immune response to environmental respiratory challenges, including the body’s histamine response.^5,6

• Can spirulina help with weight loss?

Some research suggests spirulina supplementation may support weight management goals when combined with a healthy diet and activity. This is partly attributed to its high concentration of amino acids and protein, which in turn can support a sense of satiety. In both clinical and preclinical trials involving placebos, obese adults showed measurable improvement after a specified period of spirulina supplementation.^10,11

Ready to Add Spirulina to Your Routine?

With all the health and wellness benefits delivered by these colorful algae, it’s no wonder spirulina is considered a superfood! From antioxidant defense to immune health and more, spirulina is packed with enriching nutrients that support vitality from day one. Are you ready to bolster your wellness routine with spirulina? We’re proud to offer a selection of spirulina supplements that are sure to complement any healthy lifestyle. Be sure to check them out today.

Swanson

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

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