You have to bear in mind that it takes a while for your boys to get started back up again. It doesn't happen overnight. That being said I would try three times a week at 500 IU for the first 3 to 4 weeks then if you want you can try twice a week and see how that works for you. It is an expensive addition to your Protocol, however for me the benefits outweigh the cost. There is a reputable lab on here that has them 10 for $160 which is about as low as you can find it and not have it be fake. You'll have to do your own research to find it but it shouldn't be that hard.