Testing by ConsumerLab.com, White Plains, NY, of creatine supplements found problems with the majority of products sold in liquid, effervescent and chewable forms. Problems, however, were not found among standard creatine powder products. According to findings, one liquid product contained virtually no creatine and was contaminated with a creatine breakdown compound despite claiming to contain 100% stable and pure creatine. The review included results for 23 creatine, HMB (hydroxy methylbutyrate) and glutamine supplements.