Come summers and hair troubles begin – dryness, frizzy mess and more. Having oily hair is extra annoying, because more the oil, more the washing and more the dryness. This dryness triggers more oil production and the cycle continues. Here is where the serum for oily hair comes into picture. Hair oils and serums can have a balanced relationship between each other. One can reduce the oil production by using serums that reduce frizz and provide moisture.