Vegan soup made from marinated vegetables and other ingredients can contain high levels of nitrates, a potent form of nitrosamine.
This is a concern for people with compromised kidney function.
The best way to reduce nitrates is to use low-nitrogen vegetable broth, which has the lowest nitrates and the lowest levels of saturated fats.
Vegan vegetable soup can also contain soy sauce, which can be harmful to your kidneys.
To make a healthier, less-processed vegetarian soup, try adding soy sauce or olive oil.