Far be it for me to say anything definitive, but protein is the number one supplement.
After a good workout your muscles are essentially undergoing a change to add more of itself, protein shakes give them a near instant boost in fuel to allow that process to happen faster giving you a quicker recovery time.
Overall some supplements are designed to be taken during certain times: Metabolisers early in the morning to get your bodies metabolism kick started, L-Carnatine to add amino acids before a workout, and protein after.
My limited opinion is that L-carnatine, metaboliser and protein are all you need as far as supplements are concerned.
I don't know if you should have all three when you start into BB, after some time, or if you need more?
Protein is broken down into three sub categories:
- Whey protein Concentrate; it contains about 80% pure protein
- Whey protein Isolate; contains about 90% pure protein
- Hydrolised Whey protein Isolate; is a partly digested whey, should be slightly higher than WPI and supposedly has the advantage of a faster metabolisation into the body.
Costs increase for better protein %'s.