The best muscle building supplement is not one of these expensive miracle supplements you see advertised.
It's not something that will help you build muscle without regular weight training and good eating.
The supplement is creatine monohydrate. Creatine is proven, safe and very inexpensive.
Creatine monohydrate can help you build muscle and burn fat faster (especially if you do a one week creatine load).
More about creatine monohydrate
Creatine is produced in your liver, pancreas, and kidneys.
It's also found in certain foods (beef, salmon and herring are a few).
The reason it's the best muscle building supplement is because it's safe, inexpensive and it works for the majority of people who train hard and use it consistently.
What it does and why it works
The effectiveness of creatine has been studied and documented in peer reviewed scientific and medical journals.
It works because it helps increase energy.
A chemical in your body called ATP is used for energy production when you lift weights.
Creatine is used to regenerate ATP. Since ATP is your muscles’ source of energy, you can see how creatine can be effective. It quickly regenerates ATP, and it allows your muscles to work harder and longer.
Supplementing with creatine also hydrates your muscle cells. This makes your muscles look and feel harder and bigger. In and of itself this is a strong motivator that makes you want to work out harder.
(If you want a deeper understanding of the creatine effect see this article)
Creatine comes in different forms…
monohydrate
citrate
phosphate
liquid versions
So far, most of the research done demonstrates that the monohydrate form is highly effective for building strength and muscle mass.