Certain sea algae make a poison that gets into shellfish and can stop your muscles from working, including those you need to breathe — which can be deadly.
Evidence Quality Assessment
Claim Status
overstated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The review reports mechanisms and outcomes from prior studies but does not generate new evidence; causal language implies direct proof from this study, which it lacks.
More Accurate Statement
“Saxitoxins produced by dinoflagellates such as Alexandrium spp. are associated with paralytic shellfish poisoning in humans, characterized by sodium channel blockade leading to neuromuscular paralysis and respiratory failure, based on clinical and toxicological evidence from prior studies.”
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
Supporting (1)
Microalgae toxins in food products and impact on human health: a review
This study says that tiny ocean algae make poisons that can stop nerves from working, which can make people paralyzed or even kill them — exactly what the claim says.