Another example is the yellow in cheddar cheese.<p>Apparently the yellow-ish color was originally a mark of high-quality milk from grass-fed Jersey and Guernsey cow. Now they use annatto and other spices&#x2F;dyes to add color to the cheese.<p>Essentially, when the consumer doesn&#x27;t have complete information they will have to make purchasing decisions based on proxy information. As you note, this can lead trickery from the person selling the product.