Kept on the nightstand, I roll out of bed each morning and grab CircO2. Begin morning stretches and sometimes PBS’s Classical Yoga program. THEN, I begin my morning routine. AND, energetically start my day. Been using CircO2 nearly three years; I am 77 years young. Getting up and getting started was a major undertaking everyday. When I have medical appointments my oxygen level always reads 98-100. Would recommend this supplement for sustained daily energy.