and cartilage pills. The authors sampled seven species of sharks from the waters of South Florida: Blacknose (Carcharhinus acronotus), Blacktip (Carcharhinus limbatus), Bonnethead (Sphyrna tiburo), Bull (Carcharhinus leucas), Great hammerhead (Sphyrna mokarran), Lemon ( Negaprion brevirostris ) and Nurse (Ginglymostoma cirratum) sharks, detecting high levels of the neurotoxin -N-methylamino-L-alanine (BMAA) in