Peptides: performance boosting, anti ageing drugs or dangerous snake oil? The online wellness clinics letting customers 'add to cart' experimental peptides without a doctor consult Health The Guardian Have you used peptides? What are your thoughts? Let me know below Peptides are short chains of amino acids that play vital roles in cellular signaling and repair throughout the body. BPC 157 is part of a growing list of compounds called peptides gaining interest in fitness, wellness and anti ageing circles. The buzz comes from their supposed potential to help you build muscle,