Tofu (organic, extra firm) nutrition facts

One serving of Tofu (organic, extra firm) (1 oz) has 28 calories, which works out to 98 calories per 100 g. That is about 1.4% of a 2,000-calorie day.

Not especially. It has 2.9 g of protein per serving, and protein supplies 42% of its calories. Foods where protein provides 30% or more of calories are generally considered protein-dense.

It can fit a ketogenic diet: 0.4 g of net carbs per serving, with carbs making up 10% of calories.

1.1 mg per serving, which meets the FDA definition of low sodium (140 mg or less).

0.1 g of total sugars per serving. Labels list total sugars, which include natural sugars from fruit and milk as well as any added sugars.