Its 450mg tablet and says equivalent to 1300-2000+ mg of Johns wort. Does it mean its at least 1300mg Johns wort? Coz I've been reading and people take 3 tabs of 300,mg each day. It says one a day tablet. I'm just confused. Thinking of taking 2x450mg (dry extract) equivalent to 1300+mg St John...? Is that too much? I don't want to go to my doctor about this herb. Doctor cost lots of money just to see them.thanks in advance