Alkaline food refers to the food that is metabolized and produced by the body after digestion and absorption. Generally, the acidity and alkalinity of food is determined by the type and content of minerals contained in the food, and not according to the taste of food. Alkaline food is rich in a variety of trace elements, generally containing potassium, sodium, calcium, magnesium, iron, phosphorus, chloride, sulfur 8 trace elements. Because the food contains these metal cations, after the food enters the body, it is decomposed and metabolized, and the final product generated makes the body fluid alkaline, so it is alkaline food. Distinguished by the degree of alkalinity, common alkaline foods in daily life can be divided into strong alkaline foods, medium alkaline foods and weak alkaline foods according to their strength, specifically: 1. Strong alkaline foods Wine, tea, kelp, grapes, citrus, persimmon, cucumber, carrot, natural green algae, snail, black fungus, etc. Pregnant women should not drink or drink as little as possible wine, tea and other strong alkaline foods. 2.Medium alkaline food Protein, soybean, tomato, spinach, banana, strawberry, lemon, dried plum, soybean, carrot, tomato, rape, amaranth, celery, pickled potherb, squash, dried radish, pumpkin, orange, purple cabbage, pickled bok choy, soy milk powder, etc. Pregnant women do not eat or eat as little as possible pickled potherb mustard, squash, dried radish, etc., because the pickled food has an impact on fetal development. 3, weak alkaline food tofu, potatoes, collard greens, cabbage, rape, red beans, pears, apples, radishes, onions, etc.. Kale is a flat vegetable, so pregnant women can eat it, but try not to eat it raw.