Copy pasting from the consultation he sent me:
FINASTERIDE
If you are using Xandrox on all affected areas consistently, you may not need finasteride. Azelaic acid in Xandrox will inhibit virtually all synthesis of DHT in the scalp at the follicle level. Azelaic acid has been proven to be an inhibitor of Type 1 and Type 2, 5-alpha reductase in the human skin. Azelaic acid has also been demonstrated to 'inhibit the synthesis of all of the hormones in the 17-hydroxy group', resulting in decreasing the levels of DHT in the scalp when used topically. In a study reported in the British Journal of Dermatology (Stamatiadis. 1988;119: 627-632), inhibition of 5-alpha reductase is virtually complete (98%) at 3 mmol/l (whereas Propecia/finasteride binds only with the type 2, 5-alpha reductase.)
FINASTERIDE
If you are using Xandrox on all affected areas consistently, you may not need finasteride. Azelaic acid in Xandrox will inhibit virtually all synthesis of DHT in the scalp at the follicle level. Azelaic acid has been proven to be an inhibitor of Type 1 and Type 2, 5-alpha reductase in the human skin. Azelaic acid has also been demonstrated to 'inhibit the synthesis of all of the hormones in the 17-hydroxy group', resulting in decreasing the levels of DHT in the scalp when used topically. In a study reported in the British Journal of Dermatology (Stamatiadis. 1988;119: 627-632), inhibition of 5-alpha reductase is virtually complete (98%) at 3 mmol/l (whereas Propecia/finasteride binds only with the type 2, 5-alpha reductase.)