The body will naturally develop a tolerance to any substance taken for a long period of time.
Since you have been taking 1 cap everyday and are starting to see a decrease in effectiveness, begin taking 2 caps a day and see how you feel.
If you want a stronger effect you can begin taking 3 caps a day afterwards. DO NOT EXCEED 3 CAPS DAILY.
After you are finished with your bottle, take a few weeks off before beginning your next cycle.