A modest, clearly dosed amount included for alertness, without a harsh stimulant crash.
Caffeine is included here at a clearly stated 10mg per serving — a modest amount compared to a typical cup of coffee.
It supports alertness alongside Green Tea Extract, without the formula relying on a harsh stimulant stack.
Caffeine's effects on alertness and energy are well established in the research literature at a wide range of doses.
This describes general research on Caffeine (10mg) itself, not the finished Vigor Boost product, which hasn't been the subject of its own clinical trial. See the full ingredients list or the formula overview for more.