Let's talk supplements. The seven products I've suggested may help to improve your performance in the gym, which is a very important factor when you're doing two-a-days, building muscle, getting stronger, and getting lean!
However, I know supps can be expensive, so choose 1-3 that you can afford and you know will help you make the most of your workouts. I'd choose protein, creatine, and a multivitamin, but some of you may need that dose of caffeine in order to make it through that morning workout, or BCAAs throughout the day.
Whatever supps you choose to purchase, remember that they're not going to build your physique for you. They can only enhance your training and nutrition regimen.