Is mold in tea water caused by Aspergillus flavus

Mold growth in tea water may not necessarily be caused by Aspergillus flavus, but may also be caused by other molds such as Penicillium and Aspergillus. Tea mold is usually related to factors such as environmental humidity and improper storage, and needs to be judged based on specific morphology and testing.

There are various types of molds commonly found after tea leaves become moldy, and Aspergillus flavus is just one possibility. Aspergillus flavus mainly grows on grains, nuts and other foods, and the aflatoxins it produces are highly toxic. If tea leaves are stored in a humid environment for too long, white, green, or black fuzzy colonies may appear on the surface, which may be caused by fungi such as Penicillium, Aspergillus niger, or Mucor. The mycelial morphology and color of different molds vary, and Aspergillus flavus usually appears as a yellow green powder, but it is difficult to accurately distinguish with the naked eye. If there is a noticeable odor, clumping, or discoloration after the tea leaves have become moldy, it is recommended to discard them directly. Eating moldy tea by mistake may cause gastrointestinal discomfort, and long-term intake of tea contaminated with aflatoxin may also increase the risk of liver damage. Tea should be stored in a sealed container in a cool and dry place for daily use. Unfermented tea such as green tea is more prone to mold and should be consumed as soon as possible. For tea leaves that are slightly damp but not significantly moldy, they can be spread out, dried, and brewed at high temperatures, but the flavor and nutritional value have been reduced.

It is not recommended to continue drinking tea leaves that have become moldy, as even high-temperature brewing is difficult to completely destroy fungal toxins. When storing at home, you can put food desiccants or refrigerate, and regularly check the condition of tea leaves. If you experience symptoms such as abdominal pain and diarrhea after accidentally drinking moldy tea, you should seek medical attention promptly and bring the remaining tea leaves for testing. When choosing tea, pay attention to the integrity of packaging and shelf life, and observe whether there is any moisture or clumping in bulk tea.