The benefits. Contributes to normal thyroid function (selenium in mustard seeds) Contributes to health bone, connective tissue and good psychological health (manganese and magnesium in mustard seeds) Contributes to the normal function of cells and helps to reduce tiredness (iron and phosphorus in mustard seeds) Assists in supporting a healthy immune system (enzymes and potassium in cider vinegar) What goes in. Water, organic mustard seeds, organic cider vinegar, and salt. What's kept out. Synthetic fertilisers and pesticides, sugar and food acids. Did you know? Seed plants must be left in the field for as long as possible, to allow the seeds to reach maturity before they’re harvested. This means farmers often rely on synthetic fertilisers and pesticides to protect crops. Choosing organic seeded products ensures you don’t end up consuming these nasty chemicals. Geography. Product of France Hot Tip. Mix your mustard with a splash of olive oil and mayo to create a tangy, zesty and delicious dressing for salads and veggies, or a dip for your favourite crackers.