 [ Symptoms ] can lifting weightsweight traning at ages 13 14 stunt growth  also can taking protein powder also stunt growth urgent help [ Disease ] growth is more or less genetically determined so properly done weight lifting should not have any adverse effect on linear growth after a young man   has reached puberty protein powder will not stunt growth but it will also not build muscles or bulk you up if not taken properly excess protein can harm your kidneys so be careful do not believe everything you read on those protein supplement claims