Are daylilies toxic?

Sep 15, 2025 Source: Cainiu Health

Dr. Yu Yongchao

Introduction

Under normal circumstances, fresh daylily contains trace amounts of toxic components that may cause discomfort if consumed directly; processed daylily, however, is non-toxic and safe for consumption. When consuming daylily in daily diet, it is important to distinguish between fresh and dried varieties. Fresh daylily must be thoroughly blanched and soaked before cooking, while dried daylily should be cleaned properly after rehydration.

Generally, fresh daylily contains trace amounts of toxic components, and direct consumption may cause discomfort. However, properly processed daylily is non-toxic and safe for consumption. Detailed explanation is as follows:

Fresh daylily contains colchicine, a substance that easily converts into the toxic metabolite dihydrocolchicine after entering the human body. If consumed raw or without thorough heating, it may irritate the gastrointestinal tract, causing symptoms such as nausea, vomiting, abdominal pain, diarrhea, and other discomforts. However, colchicine is water-soluble and heat-sensitive, and can be effectively removed through proper processing.

During the processing of dried daylily, most colchicine is removed along with moisture through steps such as sun-drying and drying. Fresh daylily can also effectively remove the toxic components by first blanching in hot water followed by soaking in clean water for 1-2 hours. Processed daylily is not only non-toxic but also rich in dietary fiber, vitamins, and minerals, making it suitable for cooking as a common ingredient.

When consuming daylily in daily life, it is important to distinguish between fresh and dried varieties. Fresh daylily must be thoroughly blanched and soaked before cooking, while dried daylily should be cleaned thoroughly after rehydration. Avoid eating raw or improperly processed fresh daylily, and develop good habits for handling ingredients correctly.

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Why must daylily flowers be dried before eating?

Daylilies must be dried before consumption, primarily because fresh daylilies contain colchicine, a toxic compound. Drying removes the toxin, extends shelf life, enhances food safety, and improves taste and texture. Drying is a crucial step in ensuring their safety for consumption. If raw, untreated daylilies are accidentally consumed and symptoms such as nausea or vomiting occur, medical attention should be sought promptly.

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Can pregnant women eat daylily?

Under normal circumstances, pregnant women can eat daylily (Huanghuacai), but should pay attention to moderate consumption. When consuming daylily, it is recommended to choose dried daylily. Before eating, adequately soak it in warm water, changing the water multiple times to remove any potential harmful substances. Ensure it is thoroughly cooked during preparation; avoid raw or undercooked consumption. Each serving should not be excessive, as overconsumption may increase digestive burden.

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Can daylilies treat gout?

Under normal circumstances, daylilies (Huanghuacai) generally cannot treat gout. It is recommended to seek timely medical attention, identify the underlying cause, and undergo symptomatic treatment under a doctor's guidance. If gout occurs, patients may take medications such as benzbromarone tablets, colchicine tablets, or allopurinol tablets as directed by a physician. Although daylilies are relatively safe for individuals with gout, they should be thoroughly washed and fully cooked before consumption.

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Why Can't Orange Daylilies Be Eaten?

Under normal circumstances, orange-colored daylily flowers (Huang Hua Cai) should not be consumed, mainly due to their content of colchicine. Therefore, to ensure food safety, never eat orange-colored daylily flowers. For daily consumption, choose processed dried daylily products that are free from colchicine. Additionally, certain populations, including those allergic to daylily flowers, individuals with spleen and stomach deficiency-cold, and patients with severe digestive dysfunction, should avoid consuming daylily flowers.

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Can daylilies and fish be eaten together?

Under normal circumstances, daylily and fish can be consumed together, with attention to moderate portions. However, freshness of the ingredients should be ensured during consumption. Daylily must be fully soaked and thoroughly washed to remove any potentially present colchicine. The fish should also be fresh and unspoiled. Additionally, the amount of oil and salt used during cooking should be controlled to avoid excessive intake of fats and sodium.

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Can Malabar spinach and daylily be eaten together?

Under normal circumstances, Malabar spinach and daylily can be consumed together, but it is recommended to eat them in moderation. During cooking, it is important to ensure the ingredients are thoroughly washed. Daylily should be blanched to remove colchicine, thus avoiding potential health risks such as food poisoning. It is also advisable to maintain a balanced diet in daily life, consuming more fresh vegetables and fruits to ensure adequate nutrient intake, which contributes to maintaining good health.

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What should not be consumed with daylily (Huanghuacai)?

Under normal circumstances, daylilies should not be consumed together with foods such as milk, rabbit meat, pigeon meat, quail eggs, and persimmons. They also should not be taken with medications such as roxithromycin capsules, sulfadiazine tablets, aspirin enteric-coated capsules, desogestrel ethinylestradiol tablets, and sodium bicarbonate tablets. In daily life, attention should be paid to the freshness of daylilies when consuming them.

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Are cooked daylilies safe to eat?

Fresh daylilies contain colchicine, which is not toxic by itself. However, after entering the human body, it can be oxidized into dihydrocolchicine, causing toxic effects on the gastrointestinal tract, urinary system, and other areas, leading to symptoms such as nausea, vomiting, abdominal pain, and diarrhea. Nevertheless, colchicine is easily soluble in water and can be destroyed at high temperatures. Therefore, fresh daylilies can be safely consumed after being thoroughly cooked.

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