Daylily is delicious and tender, and it is rich in nutrients necessary for human body, such as pollen, sugar, protein, vitamin C, calcium, fat, carotene and amino acids, and its carotene content is even several times higher than that of tomatoes. Every 1g of day lily contains 13.5g of protein, 1.8g of fat, 12.4g of dietary fiber, 5.6g of carbohydrate, 6.2g of ash, .6mg of thiamine, .29mg of riboflavin, 3.5mg of niacin, 8.7mg of vitamin E, 543mg of potassium, 24.9mg of sodium, 285mg of calcium, 8mg of magnesium and 1 mg of iron. Flowers contain vitamin A, vitamin B, vitamin C, protein and fat. Pollen contains trehalase. The root contains chrysophanol, Hemerocallin, Hemerocallin, Rhein, Hemerocallin, Anthraquinone, Steroids, Alkanes, Phenols and Alkaloids.