Rogain is a topical drug to apply 2-3 times each day that does not block the DHT, but stimulates the hair follicles cells to proliferate better.
There are many natural products on the market to help against hair loss. These products often contain several substances working together by different principles.
They may contain vitamins or minerals that are necessary for hair growth. Other substances give signals to the hair follicles to increase hair growth, for example procyanidin B2. Some ingredients work as anti-oxidants that inhibit oxidative attack on the follicle cells, like L-arginine.
Some natural products also contain substances to block DHT. Saw palmetto extract contains substances acting as DHT blockers by much of the same mechanism as prostate medicines. Still other ingredients can reduce the conversion of testosterone to DHT. Grean tea extract have shown itself to contain substances with this effect.
Surgery is an effective treatment against baldness in limited areas. By surgery hair follicles from parts of the scull immune to DHT are moved to bold areas. The hair in the treated areas will however not get as tight as naturally growing hair.
It is also possible to implant artificial hair into the scalp. By this method, large bald areas can be covered, but the treatment implies a certain danger for infection, requires good hair hygiene afterwards and requires a regular refill to replace lost hairs.