What food substance does tomato contain?

According to the US Department of Agriculture, the average nutrient content of tomatoes (red, ripe, raw) is as follows:

per 100g

Energy: 75kJ (18kcal)

Carbohydrates: 3.92g (of which 2.63g are sugars)

Fat: 0.2g

Sodium: 5mg

Protein: 0.88g

Vitamin A: 42µg (5% of RDA)

Vitamin C: 12.7mg (15%)

Calcium: 10mg (1%)

Iron: 0.27mg (2%)

100g is approximately the weight of a small to medium-sized tomato. Further information can be found by searching the USDA National Nutrient Database. A link is supplied below.