The phrase "much sodium" means there is a large amount of a substance called sodium. Sodium is a mineral found in salt, and having too much of it in your diet can be harmful to your health. Full definition
This type of water retention is caused by too much sodium in the body, sitting or standing for too long, or pressure from body weight. (fullhealthsecrets.com)
Looks yummy so I'm gonna try it — So how much sodium per serving? (andiemitchell.com)
It's a great flavor for stir - fry, for instance, because it doesn't have as much sodium as other ingredients, like soy sauce. (health.com)