Dr Oz did a segment on how long you can keep certain foods like sugar, baking soda and ketchup in a game he called Stash It or Trash It. Doctor Oz asked which food can be harmful to your health if it is over one year old.
Dr Oz: How Long Does Sugar Last?
Dr Oz said that you can store sugar for up to two years in an air tight container. Brown sugar is more perishable though because of the molasses in it which lets bacteria grow more easily, so brown sugar must be thrown out after a year.
Dr Oz: How to Test if Baking Soda is Good with Vinegar
Dr Oz said that baking soda should be replaced after a year because it is not stable and reacts with the moisture in your environment, so it loses its effectiveness. Also, if you put baking soda in the fridge, it will soak up the smells and so you cannot use it in your cooking. Dr Oz’s trick to test if baking soda is good or not is to add some vinegar to the baking soda and if it bubbles, then the baking soda is good, otherwise it is time to toss out the baking soda.
Dr Oz: How Long Does Ketchup Last?
Dr Oz said that ketchup lasts only one month when you open it and leave it on the counter, because lactic acid and yeast builds up. By putting your ketchup in the fridge, it can last up to 6 months, but after that, throw out the ketchup because it becomes a good environment for bacteria to grow.