Check this good old patent wich started the discussion of green tea involving lowering of DHT levels, also mentioned is Sesame seed, blackcurrent berries, linseed and a lot of other seeds (if you can get a hold on the full-text article). Seeds contain fatty acids like Alpha & Gamma linolenic acids, altough this is not the same as the proven effective free fatty acids form wich are present in Revivogen.
this is the selected part from the article, feel informed:
Feb. 25, 1997
Methods and compositions for inhibiting 5 alpha -reductase activity
INVENTOR: Liao, Shutsung, Chicago, Illinois Liang, Tehming, Centerville, Ohio
ASSIGNEE-AT-ISSUE: Arch Development Corp., Chicago, Illinois (02)
APPL-N0: 442,055
FILED: May 16, 1995
REL-US-DATA: Continuation-in-part of Ser. No. 904,443, Jul. 1, 1992 now patented 5,422,371 Which is a continuation-in-part of Ser. No. 889,589, May 27, 1992 now abandoned
2. Plants and Fungi
Preparations were also obtained and specific compounds were isolated from various plant materials. Some of these were able to regulate both the type 1 and type 2 5 alpha -reductase isozymes of rat and human. While some of these agents were inhibitory, other agents stimulated 5 alpha -reductase activities.
Each plant material (1 to 2 g) was extracted by 2 to 10 ml of water, ethanol, isopropyl alcohol, ether, chloroform, or ethyl acetate. Organic solvents can contain 0-90% of water and the extraction can be carried out at 0o-100o C. for 30 minutes to 20 hours.
When 1 g of the plant material was extracted with 4 ml of ethanol or water, and 3 mu l of the extract was tested in the liver microsomal 5 alpha -reductase assay system (the final volume of the reaction mixture was 0.15 ml), a significant inhibitory activity (over 20% inhibition) was observed with extracts from various brands of green tea, Yunnan tea, special gunpowder tea, oolong tea, black tea, chlorella, black shiitake mushroom, basil leaves, parsley leaves, and Chinese herbs, including Angelica sinensis, Anisi stellati fructus, Codonopsis pilosula, Ligustici rhizoma, Salvia mitiorrhiza, and Golden Lilly flower, seeds of borage, evening primose, black current, sesame, pumpkin, sunflower, and wheat germ. PAGE 31 Pat. No. 5605929, *