Myth: Sharks Don’t Get Cancer

There’s a persistent belief that sharks are immune to cancer, which has led to the promotion of shark cartilage supplements as a cancer-preventative product. This myth has fueled a market for these supplements, despite the lack of scientific evidence supporting the claim. It is believed that the myth stems from studies on the cartilage structure of sharks, as their bodies are mostly cartilage rather than bone. However, this misconception has led to the unsustainable hunting of sharks for their cartilage, driven by the hope of cancer immunity.

Sharks can and do get cancer, with documented cases of tumors in various shark species. The National Cancer Institute notes that while shark cartilage has been studied for its potential health benefits, no credible evidence supports its use as a cancer preventative. The immune system and biology of sharks are unique, but they are not impervious to diseases. The misconception has contributed to overfishing and ethical concerns surrounding shark products. Understanding that sharks are not cancer-immune can help reduce misguided practices and focus research on scientifically validated cancer treatments.