I read that Nizoral shampoo helps block DHT. I was prescribed this for flaky scalp. Is there different variations of this shampoo or is it all the same. The directions say don't use more than once a week. I am thinning and need something to help keep me hair in me head. Should this be combined with rogain. I am finishing a deca(400mg a week) and EQ(300 mg per week).

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