"I ordered this for my son who is 16. After using it for a couple months had an injury to his knee. An x-ray showed that the growth plates in his knees were closed. Since the growth plates in the knees are the last to close the chance of any height supplement working were very low. I then tried to get a refund for the product. The company doesn't answer their phone. They only have a recorded message. I filled out a form 4 times on their website with no response and also emailed them. I have filed a complaint with the Better Business Bureau. I feel stupid for buying this stuff."