Until recently, almost all vocational education took place in the classroom, or on the job site, with students learning trade skills and trade theory from accredited professors or established professionals.
Antiandrogens, are compounds either natural or synthetic, that have the ability to lower the levels of testosterone and DHT (the androgens) and/or prevent the natural androgen pathways and their functions by blocking the androgen receptors in tissue.
Less testosterone means less acne. Currently, only brands like Yaz, Estrostep, and Ortho Tri-Cyclen have received FDA approval for acne claims (because they're the only ones that have submitted the clinical studies needed for FDA approval). But it's likely other combination Pills will reduce it, too.