Many of us use serums as part of our daily skincare routines to smooth wrinkles, reduce age spots, lift bags, and moisturize our face and neck. Just as vital is scalp and hair care serums. Quality hair and scalp serums can curb thinning, hair loss, breakage, and other age-related issues. However, just as the different types of serums vary, so do the different ways to apply them to get the best results. To get the most out of the hair care products you purchase, make sure you are using them correctly. Let's look at the different types of serums and whether it is better to put each on wet or dry hair.