I have to praise the Garden of Life Raw Prenatal blend. I've had mono, several taxing miscarriages with hemmoraging, anxiety attacks, you name it, and have been exhausted for the past few years. The vitamins make SUCH a difference. I was also taking the B-complex at first, and I had to remember to take them earlier in the day, or I had so much energy that I couldn't sleep! They can be pricey, but I buy fewer things because the vitamins do a fantastic job of covering so many. It is the first time in years that I feel like I can get through a day without crashing or becoming so overwhelmed that I want to bury myself in a hole.