Blue-green algae (AFA)

Tier 3 — weak evidence · Cognition · Energy claims

Aphanizomenon flos-aquae is a cyanobacteria harvested from lakes and sold as a superfood. Marketing claims about brain health and energy lack clinical evidence. Wild-harvested products carry a real risk of microcystin contamination — potent liver toxins that vary by lake and season. Several poisoning incidents have been reported. Not recommended unless from rigorously tested sources.

Dose: No evidence-based dose; microcystin contamination risk from wild-harvested sources