Webster Dictionary(0.00 / 0 votes)Rate this definition: Melanin(noun) a black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. It is supposed to be derived from the decomposition of hemoglobin.
How to prepare your insulin dose if you are using two types of insulin: 1  When you mix regular insulin with another type of insulin, always draw the regular insulin into the syringe first. When you mix two types of insulins other than regular insulin, it does not matter in what order you draw them into the syringe.
How To Inject Insulin. Insulin injections with an insulin pen follow a set procedure. When you are injecting insulin, you should aim to inject into the fatty tissue just underneath the skin. If you think you are injecting into the muscle, you may want to change your technique or ask your GP to prescribe shorter needles.The steps below are a broad guide to injecting insulin.ow To Inject Insulin. Insulin injections with an insulin pen follow a set procedure. When you are injecting insulin, you should aim to inject into the fatty tissue just underneath the skin. If you think you are injecting into the muscle, you may want to change your technique or ask your GP to prescribe shorter needles.