The Best Spirulina: Top 10 Brands Reviewed for 2020

Best Spirulina Supplement

Best Spirulina Supplement Brands

Onlinestrength analyzed 10 best-selling Spirulina supplements in the United States, recording total spirulina content and heavy metal (arsenic, cadmium, lead, mercury) contamination.

Supplements that containe low quality ingredients or controversial binders, artificial coloring agents, and/or preservatives were penalized and received lower rankings.


All Benefits/Effects/Facts & Information

Spirulina is a blue-green algae said to be a necessity for building healthy and strong body.

Spirulina naturally contains high levels of various B vitamins, beta-carotene, other carotenoids, and essential minerals, including calcium, iron, magnesium, manganese, potassium, and zinc.

Spirulina benefits:

  • Powerful antioxidant that helps the body eliminate harmful free radicals improving skin and hair quality, and decreasing chance of illness greatly.
  • Detoxes heavy metals from the body.
  • Helps Prevent Cancer
  • Nutrient rich – Vital micro nutrients that improve your overall health.
  • Enhance energy performance
  • Encourages lean muscle growth and fat loss

Things to Know

Also Known As

Blue-green Algae

Things to note

  • The B12 in spirulina has low bio availability and should not be used as B12 supplement.

How to Take

Recommended dosage, active amounts, other details

Spirulina dosages: 1 to 8.4 g daily.

  • Cholesterol benefits – 1-8 g per day.
  • Muscle performance – 2 – 7.5 grams per day.
  • Blood glucose control – 2 g per day
  • Blood pressure may be affected at doses of 3.5-4.5 g per day
  • Effects for fatty liver have been seen at doses of 4.5 g per day

Reviewed, ranked, and written by the professional editorial team

This research is supported by you, our readers, through our independently chosen links, which earn us a commission. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.