Colostrum is basically a mother cow's first few days of milk, which is richer in various immune factors. It has been shown to imporve recovery and performance in a few scientific studies and is also used for boosting immunity. Assuming you are already using a good protein and creatine product, this could be worth trying but it has never been a very big seller and you may be better off using pre-workout supplements, a good multi-vitamin or joint product.