The brain region called the hippocampus is the center of learning and memory in the brain, and the brain cells in this region are often the first to be damaged. That's why memory loss is often one of the earliest symptoms of Alzheimer's.
Most cheese contains some amount of iodine, but the exact amount depends on what type of cheese you're eating. An ounce of cheddar cheese, for example, contains 12 micrograms of iodine, which is 8 percent of the amount you need for the day. Mozzarella cheese is a good source of iodine as well, according to HealWithFood.org. Sheep and goat cheese supply iodine, too.
Annatto is added to give Cheddar a sweet, nutty flavour. The largest producer of Cheddar cheese in the United States, Kraft, uses a combination of annatto and oleoresin paprika, an extract of the lipophilic (oily) portion of paprika.