best program to gain muscles


I bought a 4-weeek FBburn program in earlier this month. Last time i checked i weighed 53kgs in Dec 2017. But I started this program for only 2 weeks now and i checked yesterday i lost 2kgs of fat and gained 1 kg of muscle (which is exactly my goal to turn fats into muscles)! I did not put too much limits on eating though, the results are still satisfactory! Thank you for this amazing program, i can't wait to see what i'll be like in 2 more weeks!