Rhubarb is a strange one. In Britain it’s classed as a vegetable and in the US a fruit (something to do with tax I think). It’s really versatile; you can treat it like a fruit and sweeten it with a little stevia or treat it like a veg (I like to use it to make a nice sour curry).
Anyway here are the nutritional stats for a 100g serving (I’ve also included stats for courgette/zucchini for comparison):
Total Fat: 0.2g Saturated Fat: 0.053g Cholesterol: 0mg Sodium: 4mg Total Carbohydrate: 4.5g Dietary Fibre: 1.8g Sugar: 1.1g Protein: 0.9g
Vitamin A: 2% Vitamin C: 13% Calcium: 9% Iron: 1%
Total Fat: 0.18g Saturated Fat: 0.037g Cholesterol: 0mg Sodium: 8mg Total Carbohydrate: 3.4g Dietary Fibre: 1.1g Sugar: 1.7g Protein: 1.2g