Tool

Should I use spirulina?

A short walk through the questions a careful clinician would ask before clearing you to start. The answer at the end is one of: green, amber, or red.

Have you been diagnosed with phenylketonuria (PKU)?

Are you the parent of a child under 3 considering spirulina for them?

Are you currently pregnant?

Do you have a diagnosed autoimmune condition (lupus, MS, RA, Hashimoto's, psoriasis, Crohn's, etc.)?

Do you take immunosuppressant medication (e.g. after organ transplant)?

Do you take warfarin or a similar anticoagulant?

Answer all six questions to see a recommendation.

How conservative this tool is

We err deliberately toward caution. If you have any condition or take any medication where the evidence is mixed or sparse, the tool defaults to amber: ask your doctor. It does not give you a green light in those situations even if your cousin’s naturopath did.

That’s because we don’t know your specifics, and the cost of being wrong on safety is much higher than the cost of being told to ask a professional.

What “ask your doctor” actually means

For an uncomplicated chat: print this page or a screenshot of the result, take it to your appointment, and frame the question as: “I’m thinking of taking spirulina at 1–3 grams a day. Is there anything in my situation or medication list that should make me hold off?”