The reason that the shampoo works well on acne is because it contains Zinc pyrithione and antifungal properties which help with seborrheic dermatitis, acne vulgaris and an acne-like inflammation of hair follicles called pityrosporum folliculitis.
Overall, I would say that if you have been searching for an affordable acne treatment, you may consider washing your face with Head & Shoulders shampoo.
Kindly watch the video to see the full process:-
https://youtu.be/zObrbME4OcM