Well I get good results with 6 caps and great results with 8, but you have alot more mass then myself so I would say 8-10 caps. I dose it as follows, 2 as soon as I get up, 2 30 minutes before wo, and 4 before I go to bed. I double the dose before bed because for me powerful kicks ass in the sleep department. If you dose at 8 a day and you have five bottles they should last 85 days, if dosing at 10 a day they'll last 67 days, and if you really want to get crazy they would last 56 days at 12 per day. I would start off at the lower end and work your way up.