Onions and seaweed can be eaten together, as they are two different types of food. Eating them together can absorb different types of nutrients, which is beneficial to the body. However, in daily life, it is necessary to do a good job of dietary care, control the intake of food, and any food consumed in excess can affect the health of the body.

Onions are a type of food rich in nutrients, with a high content of vitamin C, and also contain folic acid and potassium. They also contain fiber and carbohydrates. Seaweed is a type of seafood, rich in iodine, and also contains fat and protein. It also contains dietary fiber and mineral components. These nutrients in onions and seaweed are the nutrients required by the human body. After eating onions and seaweed, these nutrients can complement each other, making the absorption of nutrients in the body more comprehensive, and will not cause serious harm to the body. Therefore, onions and seaweed can be eaten together.

However, onions contain capsaicin, which needs to be consumed in moderation to avoid stomach damage. Otherwise, it may lead to increased stomach acid secretion, causing discomfort such as burning sensations in the stomach, and may also be accompanied by nausea or vomiting.