Many misconceptions exist about what can help prevent hair loss, one of these being that lack of sexual activity will automatically prevent hair loss. While a proven direct correlation exists between increased frequency of ejaculation and increased levels of DHT, as shown in a recent study by Harvard Medical School , the study suggests that ejaculation frequency may be a sign, rather than a cause, of higher DHT levels.  Another study shows that although sexual arousal and masturbation-induced orgasm increase testosterone concentration around orgasm, they reduce testosterone concentration on average (especially before abstinence) and because about 5% of testosterone is converted to DHT, ejaculation does not elevate DHT levels. 
Other side effects include increased risk of heart problems in older men with poor mobility, according to a 2009 study at Boston Medical Center. A 2017 study published in JAMA found that treatments increase coronary artery plaque volume. Additionally, the Food and Drug Administration (FDA) requires manufactures to include a notice on the labeling that states taking testosterone treatments can lead to possible increased risk of heart attacks and strokes. The FDA recommends that patients using testosterone should seek medical attention right away if they have these symptoms:
So let’s review…androgens are involved in ROS generation, and ROS is related to TGF-β secretion. This is one of the significant events that are involved in androgenetic alopecia or male pattern baldness. In tests during sub-cultivation of hair cells (dermal papilla cells), sensitivity to androgens may be low because of the reduced expression level of the andogen receptor. Androgen receptors are expressed at higher levels within the hair cells of bald frontal scalps than those of non-balding occipital scalps.
The most effect antioxidant enzyme boosters for hair growth purposes in my experience are the following: Ecklonia cava, curcumin, and trans-resveratrol.