In reply to Al Evans:
Al, I don’t doubt for a moment your experience, I seriously doubt your interpretation.
The suggestion is that Glucosamine helps rebuild cartilage (there are no suggestions that it helps soft tissues such as tendons). The way this might work takes months, if not years, not two days. This is why studies have to be long-term.
You wanted the tablets to work. Placebos can be astonishingly effective; the mind is the strongest pain-killer of all. This is why studies of pain treatments have to have a credible placebo or sham treatment. The cynic in me thinks this might be why many Doctors recommend it…
The nature of aches and pains is they fluctuate between bad, not-so-bad and back to bad again if you do absolutely nothing. This is a gift for all kinds of treatments, as we naturally tend to seek help when things are at their worst so it is then very likely that the pain will improve afterwards. It would have got better whatever people did. Another reason for needing a sham treatment if you want to test a drug properly.
There is a very good reason why ‘science’ is changing it’s mind over Glucosamine: Initial studies were funded by suppliers. The early studies tended to be small, didn’t last for very long (Glucosamine supplying companies are not as rich as drugs companies, so this is no surprise) and patients might have known what tablet they were taking so they could have been biased. More recently, studies have been funded by government bodies and medical charities, they can afford to have more people taking part and go on for longer, so these studies have a better chance of being the true story. The recent studies show no effect compared with taking a placebo tablet.
http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=pubmed&dop...
This is not to say that Glucosamine might not work in some people, and finding out the kind of people that it might work on is a job for a study with lots of people in it.
My slight concern is that little is known about the side-effects of Glucosamine and we’re all popping the stuff without knowing what it might be doing to our Stomach, Kidneys, Blood-sugar (there are theoretical reasons why it might lead to diabetes, not yet proven either way).
I think it’s a good subject for The Pub, as it’s something that lots of people are interested in and frequently ask about.