ZMA DOES work. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16648790&query_hl=1&itool=pubmed_docsum http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=abstractplus&db=pubmed&cmd=Retrieve&dopt=abstractplus&list_uids=16648789 HOWEVER. Look at the dosage. They used 3mg zinc per kg body weight every day for a period of weeks. Most ZMA products only contain around 30mg of zinc.. so unless you weigh 10kg, it probably not going to do very much. For a 180lb (81kg) guy he would need 243mg zinc or a whopping 8 ZMA tablets per day. A 200lb guy would need 10 tabs a day. That means the pack of 60 tabs for £15 is going to last you only 6 days... not good value IMO. It would be much simpler to buy zinc by itself and avoid the ZMA crap. In those studies they didn't give B6 for better absorption or anything else - they just gave straightforward zinc suplhate, and it worked. With a little googling I found you can buy 360 15mg tablets for £5. Even at 240mg a day, it would last you for around 3 weeks, and it's a HELL of a lot cheaper than buying ZMA from any of the supplement companies. You can add in the other stuff like the B6 if you want. They're also much cheaper if you buy them separately. I hope this was useful to anyone who was considering buying ZMA.