There have been documented cases of fatal poisoning related to the consumption of spoiled coconut water. A notable case published in medical literature describes a 69-year-old man who passed away after consuming contaminated coconut water.

• The Cause: The coconut water was contaminated with the fungus Arthrinium saccharicola, which produced a potent toxin called 3-nitropropionic acid.

• The Circumstances: The victim consumed coconut water from a "preshaved" coconut that had been stored at room temperature for an extended period (approximately one month). Upon consumption, the victim noted that the water had a foul taste and the interior of the nut appeared slimy and rotten.

• Symptoms: Shortly after consumption, the individual developed symptoms including nausea, vomiting, sweating, confusion, dystonia (involuntary muscle contractions), and eventually fell into a coma.

• Medical Conclusion: Forensic analysis confirmed that the cause of death was poisoning from the 3-nitropropionic acid produced by the fungus.

Important Health Warning: Medical experts emphasize that fresh, properly stored coconuts are safe. However, consumers should be extremely cautious:

1. Do not consume any coconut water that tastes, smells, or looks abnormal (slimy, discolored, or rancid).

2. Storage: Follow recommended storage instructions (typically refrigeration for processed or opened coconuts). Do not leave pre-opened or pre-cut coconuts at room temperature for long periods, as they become a breeding ground for harmful bacteria and fungi.

3. Hyperkalemia: Separate from fungal poisoning, doctors also warn that excessive consumption of healthy coconut water can lead to severe hyperkalemia (dangerously high potassium levels), which can cause heart rhythm issues, especially in people with underlying kidney conditions.