Non-toxic

The vitamin content in lettuce leaves is generally higher than that in the stems. The carotene content in the leaves is dozens of times higher than that in the stems. Vitamin B1 is in the leaves. Twice that of vitamin B2, 5 times that of vitamin C, and 3 times that of vitamin C. The niacin content in leaves is not only higher than that in stems, but its antioxidant effect is also better. In addition, the leaves also contain a lot of calcium, which would be a pity if they were discarded.

Extended information:

Lettuce is rich in nutrients, especially in the leaves. Every 500 grams of fresh lettuce leaves (Beijing area) contains 10 grams of protein, 2.5 grams of fat, 16.5 grams of carbohydrates, 190 mg of calcium, 185 mg of phosphorus, 5.5 mg of iron, 10.7 mg of carotene, 0.6 mg of vitamin B2, and vitamins C75mg etc. But the content in the stems is much lower. Every 500 grams of lettuce stems contains only 1.5 grams of protein, only 0.2 grams of fat, only 4.7 grams of carbohydrates, and very little carotene and vitamin C.

The edible part is 62%. Each 100g contains energy 59kJ, water 95.5g, protein 1g, fat 0.1g, dietary fiber 0.6g, carbohydrate 2.2g, carotene 150μg, retinol equivalent 25μg, thiamine 0.02mg, riboflavin 0.02mg, Niacin 0.5mg;

Vitamin C 4mg, vitamin E 0.19mg, potassium 212mg, sodium 36.5mg, calcium 23mg, magnesium 19mg, iron 0.9mg, manganese 0.19mg, zinc 0.33mg, copper 0.07mg, Phosphorus 48mg, selenium 0.54μg. 89% of its leaves are edible. Each 100g contains 75 kJ of energy and 13mg of vitamin C, which is significantly higher than the stem. Therefore, from a nutritional perspective, the habit of eating lettuce stems rather than leaves should be changed.

Baidu Encyclopedia - Lettuce

People's Daily Online - Can lettuce leaves be eaten? Lettuce leaves are high in vitamins