Lightly roasted coffee is healthier, because the longer the roasting process, the lower the content of chlorogenic acid in coffee, and chlorogenic acid is a polyphenol naturally produced by plants, which is beneficial to health. Therefore, compared with ordinary coffee, it takes three times of deep roasting coffee to achieve the same effect. The key lies in the content of chlorogenic acid.
Of course, chlorogenic acid is only one of the effective components of coffee. Besides chlorogenic acid, coffee also contains many other effective ingredients, such as caffeine, which is very beneficial to our health. But except chlorogenic acid, other ingredients will not change because of the degree of coffee roasting, so lightly roasted coffee is healthier.