Saxitoxin

Saxophilin prevented and reversed otherwise lethal saxotoxin poisoning in mice.

Saxitoxin is produced by certain algae and can accumulate in shellfish.

Eating contaminated shellfish can cause paralytic shellfish poisoning, which attacks the nerves and muscles and can interfere with breathing.

Saxifilin acts like a molecular sponge, binding tightly to the toxin before it can reach its targets.