Two most important things for muscle growth are exercise and nutrition.
When you are involved in any kind of physical training and especially weight training, your body needs a lot of extra nutrients to cope up with the increased demand.
Probably the biggest mistake any person could make would be training without adequate nutrition.
So which is the best muscle building supplement? I would say the most important nutrients for muscle growth are the proteins.
You have to increase your protein intake according to your fitness goals.
Our normal daily diets cannot fulfill this requirement.
The best way to do it would be getting a supplement like whey protein.
Whey protein is easily available everywhere and all the major brands have some really good quality products based on whey proteins.
If you want to take up your muscle building to the next level, a combination of supplements always works best.
For eg - whey protein can be combined with creatine monohydrate to increase your muscle strength.
The exact combination depends on your fitness goals, diet and body type.
Some people also need to lose fat in order to have well defined muscles and some need to add more bulk so it all depends on your present level of fitness and where you want to take it further.
A good plan for muscle growth takes all these factors into consideration.
Anyone who is into weight training should have a fundamental knowledge about nutrition and nutritional supplements.
All this information can help in maximizing their results.