Spirulina

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2 Aug 2021

Dr Fuhrman: (2016) This article says:

Also, I don't recommend spirulina, because spirulina supplements have been found to sometimes contain toxins that damage the liver or brain.

Dr Andrew Weil: (2019) Is Spirulina Safe? says:

Given the emerging research on blue-green algae and neurological diseases, are spirulina foods and supplements safe?

No. To my mind, spirulina and other blue-green algae supplements are unsafe. For years, I have been warning against consuming them. My main concern is the neurotoxins that spirulina and related organisms may contain.

Dr Greger

Spirulina is a type of blue-green algae. Dr Greger has reservations about blue-green algae in general, not just spirulina.

Articles by Dr Greger:

(2014) Toxin Contamination of Spirulina Supplements

Videos by Dr Greger:

(2013) Infant Seizures Linked to Mother's Spirulina Use

(2 mins) Transcript. Dr Greger's summary: "Contamination of spirulina supplements with toxins from blue-green algae raises safety concerns."

(2010) Another Update on Spirulina

(1 min) Transcript. Dr Greger's summary: "Potential neurotoxicity is another concern regarding spirulina supplements."

(2009) Update on Spirulina

(1 min) Transcript. Dr Greger's summary: "Concerns about spirulina supplements extend to liver toxicity."

(2007) Blue-Green Algae & Spirulina

(2 mins) Transcript. Dr Greger's summary: "The risks associated with these supplements may outweigh the benefits."

Dr Klaper

(3 mins, 2020) Spirulina - Is It Blocking Your B12 Absorption?

Video description:

Dr. Klaper raises his concerns about eating spirulina powder and the potential that it can block your vitamin B12 absorption. It has a vitamin B12 analog that can block receptor sites. Even though spirulina protein powders claim to have health benefits, the possibility of other contaminants is not worth the risk.

Chlorella

Chlorella is a type of green algae, which is different from blue-green algae like spirulina. Dr Greger recommends chlorella but recommends that we avoid blue-green algae in general.

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