Sorry, Shen Min has virtually nothing to do with DHT, according to the makers. There are three Shen Min products. Only for one of them to they even refer to DHT. Here is what the manufacturers claim about the topical:
100% natural hair nutrient for men and women. The serum increases the rate of hair growth through stimulation of the hair follicle.
Shen Min Topical utilizes a patented lipoceutical, time-release multiphase delivery technology. It contains high energy compounds that assist in stimulating embryonic follicle metabolism and counter acts and inhibits free radical binding to receptor sites.
Shen Min Topical also increases peripheral blood circulation, and supplies nutrients (Herbal Blend Hair Complex) to the hair follicles.
http://www.folica.com/Shen_Min_Topica_d620.html
Here is what the manufacturers claim about what they call the "activator":
Lipid-complex delivery system. A revolutionary healthy hair system for men and women.
Shen Min Activator utilizes a patented lipoceutical, time-release multiphase delivery technology. It contains high energy compounds that counteract and inhibit environmental free-radical damage while supplying intensive nourishment (Herbal Blend Hair Complex) to the hair. Progestoplex is a revolutionary combination of natural nutriceutical components never before combined in one product. Together they constitute the most advanced formula in hair care available today! Shen Min is the Chinese formula renowned worldwide for its ability to enhance the appearance & texture of hair. Retinyl Palmitate is scientifically proven and patented. Scientifically engineered for the life of your hair.
http://www.folica.com/Shen_Min_Activa_d621.html
Here is what the manufacturers claim about the vitamins:
Shen Min (meaning "Life/Vitality" in Chinese) is a 100% natural hair nutrient derived from the eastern wild rose, also known as He Shou Wu. It is best known for its ability to stimulate hair growth and restore graying hair to its original color. . . . While the exact mechanism is still unknown, Shen Min seems to extend the growth phase of the hair follicle, thus reducing the number of hairs in the resting phase and fall out phase. The net effect is a greater number of hairs growing and fewer falling out. Another purported benefit may be derived from the ability of Shen Min to block DHT (De-Hydro Testosterone) from binding to the follicle. DHT, the "bad" testosterone, is a leading cause of male pattern baldness because it helps deactivate the hair by binding to the follicle. Men produce greater levels of DHT as they age.
* The roots used are no less than 10 years old and organically grown and harvested.
* Most roots available on the market today are less than 3 years old.
* Shen Min uses the only standardized root in the industry. Each tablet contains 150 mg of 12:1 extract with 435 mg of the raw herb. No binder or fillers are used.
* Considered a naturally alternative to Rogaine/Minoxidil and is 100% safe with no known side effects.
* Helps grow terminal hair
* Contains Bioperine, a black pepper extract proven to help increase absorption and utilization of nutrients.
http://www.folica.com/Shen_Min_Advanc_d44.html
Notice that only in the description for the vitamins is DHT even mentioned. And then, they claim that blocking DHT from binding with the follicle "may be" a "purported" benefit. How many more weasel words can an ad use? Also, keep in mind that free radicals are not DHT, so when the description refers to free radicals, it is not talking about DHT. Any cheap multi-vitamin will combat free radicals to some extent, as long is it contains any anti-oxidant such as vitamin C.
Nowhere do the manufacturers claim that Shen Min blocks the formation of DHT. All they really claim is that Shen Min may increase blood flow to the follicles, that it combats free radicals, and that it provides "nourishment" to the follicles. What do free radicals have to do with hair loss? And hasn't the "nourishment" theory of hair loss been thoroughly debunked by now?
So whether you believe that Shen Min does any good or not, it is simply inaccurate to claim that it in any way blocks the formation of DHT. Believe in Shen Min or don't, I don't care, but it is simply misinformation to say that it blocks the formation of DHT.
BTW, I took these quotes from the folica.com website, which uses descriptions provided by the manufacturers for the products sold on the website.