Onion germination is not toxic, but it tastes bad and bitter. Onions with long buds usually indicate that they are very old, and buds are produced due to lack of underground nutrients and air environment. If the important parts of onions are still healthy, you can cut off the buds and eat the rest. If onions are found to be soft, rotten or rotten, they should be discarded to avoid discomfort after eating.

Under normal circumstances, fresh onions will stay healthy for a long time, but if you find softened or rotten parts on the surface of onions, you should avoid eating them. When choosing onions, you can check whether there are softened parts, especially near damaged objects.

Matters needing attention in purchasing onions

1. Appearance: the skin should be dry, free from damage and softening, smooth and tidy, and free from spots.

2. Smell: The smell of onions should be clear, rich and odorless.

3. Weight: To have weight, onions need to have a sense of weight, that is, they are rich in water.

4. Size: Try to choose the same batch of onions with the same size, and choose medium-sized onions to ensure their good quality.

5. Onions are rich and varied, which are divided into white onions, purple onions and other varieties according to their uses. Choose the variety that suits your needs, and also choose according to the specific cooking needs.