Can eating raw lotus seeds cause poisoning?

Generally, whether eating raw lotus seeds causes poisoning depends on the type of lotus seed and the amount consumed. White lotus seeds have had their outer skin and germ removed, making them safe for direct raw consumption and typically not causing poisoning. However, eating red lotus seeds raw may lead to poisoning. The details are as follows:

Lotus seeds possess various health benefits, including strengthening the spleen, stopping diarrhea, reducing leukorrhea, benefiting the kidneys, preserving essence, nourishing the heart, and calming the mind. Lotus seeds are categorized into red and white varieties. White lotus seeds, with their outer skin and germ removed, can be eaten raw and generally do not cause poisoning when consumed in moderation. Rich in protein, fats, carbohydrates, and other nutrients, they help supplement essential nutrition for the body and assist in lowering blood pressure and promoting heart and mind wellness.

Red lotus seeds contain the green germ (lotus heart), which includes alkaloids such as liensinine that have mild toxicity. Consuming red lotus seeds raw, especially in large quantities, may lead to symptoms of poisoning such as nausea, vomiting, and diarrhea. In severe cases, it could even result in unconsciousness, breathing difficulties, or convulsions. Additionally, raw lotus seeds contain a substance called cyanogenic glycosides, which can be broken down by enzymes in the mouth and gastrointestinal tract into hydrogen cyanide—a highly toxic compound that interferes with cellular respiration and leads to tissue hypoxia.

When consuming raw lotus seeds, moderation is important. They can be paired with foods known to strengthen the spleen and benefit digestion, such as red dates or Chinese yam, to enhance their nourishing effects. If any discomfort occurs after eating lotus seeds, consumption should be stopped immediately and medical attention sought.