It is better to rely on organic sources of protein rather than supplements. Go for chicken, fish, pulses, soya milk, egg yolk and skimmed milk. These protein rich food are fundamentally good to regulate the wear and tear of the body and can help build muscles faster.
Your vote on this answer has already been received
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content. Plant protein is found (eg) in beans (esp. soy beans), lentils, nuts, quorn and seeds.