Common treatments for male pattern baldness are minoxidil and finasteride.
Saw palmetto is known to block the action of a certain male hormone which contributes to male pattern baldness.
In some studies, male pattern baldness slowed as these conditions were corrected, though how the two were connected is still being determined.
Generally, male pattern baldness occurs over a period of several years, though the exact pattern and speed varies from individual to individual.
Some men proudly embrace male pattern baldness as a symbol of maturity, and in fact many women find the style attractive and even sexy if the man is confident.