Round lettuce is also called ball lettuce and west lettuce. Lettuce is imported from the west, so it is named lettuce. Lettuce is a direct root system with shallow distribution and weak fertilizer absorption ability. Ball lettuce is round, oblate, conical and cylindrical, with delicate texture and is the main edible part.

Lettuce can grow to 0.25 to 0.8 meters high, with hollow stems and milky leaves, which are mostly flat and long, ranging from typical oblong, needle-like to linear. The flowering period is from July to August, and the seed maturity is from August to September.

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Nutritional analysis of lettuce

1, lettuce contains dietary fiber and vitamin C, which can eliminate excess fat, so it is also called slimming lettuce;

2. Because its stems and leaves contain lettuce, it tastes slightly bitter, and has the effects of analgesia and hypnosis, lowering cholesterol and adjuvant treatment of neurasthenia.

3. Lettuce contains mannitol and other effective components, which has diuretic and blood circulation promoting effects;

4. Lettuce contains an "interferon inducer", which can stimulate human normal cells to produce interferon, thus producing an "antiviral protein" to inhibit the virus.

Reference: Baidu encyclopedia lettuce