Dijon mustard has 66 kcal and 2340 mg sodium per 100 g. Near zero calories at typical serving sizes — a teaspoon (5 g) is ~3.3 kcal. The sodium is the real tracking concern: ~117 mg per teaspoon stacks fast.
How should I track Mustard, Dijon?
Mustard, Dijon is a good source of magnesium. Small amounts of Mustard, Dijon add up faster than most people realize. A systematic review (Whitton et al., Adv Nutr 2022) found that condiments are among the most frequently omitted items in food logs — skipped 1–80% of the time. A tablespoon of mayo or dressing can add 50–100 calories, and most people use two or three tablespoons without measuring. The fix is simple: keep a teaspoon or scale near your plate and measure once. Sauces and dressings are often the hidden reason a "healthy" salad ends up at 600+ calories.