I am also looking for a way to protect someone from seeing sheet formulas and also the whole book. So there are many ways I am looking for protection(1- sheet formula, 2 - whole book, 3 - individual sheets), BUT after reading many discussions here while searching each forum, my conclusion is that EXCEL's protections can ALL be hacked very easiely and quickly.

If so: What are alternatives. I have a health program done in Excel that was used to train athletes - Was used to train several Mr Olympia Athletes and works! My friend has spent 25 years and gave me the info to put together and works great! The only problem is I have spent months doing in Excel but I do not want anyone stealing his secret formula. As all the work I did for him was Free and I would be upset if someone stole the info from him due to my carelessness.