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Brock Can you help me please

Brock after reading all the posts about vitex, i went out and bought myself some. But now i have no clue as how much i should use.It is a 400mg capsule and the bottle says to take two a day one in the am and one in the pm, just wondering what your recomendation would be, also can i take fishoils and zma with it.
Thankyou
FFB