Male or female, a healthy scalp means stronger hair follicles, which in turn, means healthier hair. Take time to nourish and feed the scalp at least two to three times a week by massaging in a scalp focused cream or oil treatment, especially concentrating on areas where the hair is weak or thinning - such as around the hair line and crown. Leave-on overnight and wash in the morning.
Remember, hair grows 1/2 inch per month so you will see an improvement in thickness after a few weeks. Furthermore, avoiding harsh, chemical shampoos and moving over to natural cleansing will reinforce all the benefits and effort.