Peptides are often well tolerated, but they can still cause temporary reactions while the body adapts. Some commonly reported effects include: BPC 157 headaches, nausea, increased appetite TB 500 Frontiers Dysregulation of lipid metabolism, energy production, and oxidative stress in myalgic encephalomyelitis chronic fatigue syndrome, Gulf War Syndrome and fibromyalgia BPC 157 Before and After: 1 Amazing Transformation The Tiny Powerhouses: How Peptides Could Revolutionize Orthopedic Healing Regenexx at New Regeneration Orthopedics