The first possibility is that the essence produced by a cosmetics brand is dark blue, which is mainly used to repair the collagen of the skin, thus making the skin more delicate and smooth. The second possibility is health care products. This is because the health care products produced by a foreign health care product brand are all dark blue, and according to everyone's physique, everyone will have more differences when choosing some health care products, so we suggest that everyone must choose health care products according to their physical condition. In fact, in our life, because there are all kinds of drugs, the colors of drugs are different. When choosing some drugs, you must go to the hospital to consult a doctor before choosing. The above is about what the dark blue capsule will be. Therefore, when we choose some drugs in our life, we must first understand these drugs before choosing them, which will be healthier for our health. Moreover, we suggest that you don't rely too much on certain drugs, and you'd better improve your body's symptoms through reasonable eating habits and good work and rest time.