Two reasons for keeping Ketchup in the fridge.
1. Slows oxidation, keeps it fresher tasting and slows degradation of flavours over time.
2. Although Ketchup PH is ~3.7 making pathogenic bacteria an unlikely resident, it's not impossible. Also Mould growth, is severely inhibited at refrigeration temps (~4°C) and is far more likely at 'room temp'.
but freedom of choice is a wonderful thing!
1. Slows oxidation, keeps it fresher tasting and slows degradation of flavours over time.
2. Although Ketchup PH is ~3.7 making pathogenic bacteria an unlikely resident, it's not impossible. Also Mould growth, is severely inhibited at refrigeration temps (~4°C) and is far more likely at 'room temp'.
but freedom of choice is a wonderful thing!