Timing and consistency
Most energy and endurance products expect a daily habit, taken at roughly the same time. Consistency is the variable you control, and it is also the only way to judge whether a product earns its place.
Give a formula several weeks rather than a few days, keep your training and sleep steady over that period, and change one thing at a time. If you add a multivitamin and a botanical in the same week, you will not know which one mattered. Slow addition is boring and it works.
If you take prescription medication, confirm the timing and the product with your doctor first. These are dietary supplements, not medicines, and they are not intended to diagnose or treat any condition.