Spirulina- The blue pigment, not the green, is the active compound

Spirulina is sold as a "green superfood." But its primary bioactive compound is phycocyanin, a blue pigment (phycobiliprotein) that gives spirulina its blue-green color. Phycocyanin inhibits NADPH oxidase (a key inflammatory enzyme), is neuroprotective, and has 20x the antioxidant capacity of ascorbic acid on a molar basis. The "green" marketing obscures the fact that the active is blue.Publications of interest:https://pubmed.ncbi.nlm.nih.gov/18158824/https://pubmed.ncbi.nlm.nih.gov/12769719/https://pmc.ncbi.nlm.nih.gov/articles/PMC9185767/