Initially I was suspicious that the promotion of these necklaces would rely heavily on nonsense about the magical properties of crystals. But most of the sites I found based their claims on the succinic acid mechanism, so it deserves to be checked. Does amber contain succinic acid? Is it released by warmth and absorbed into the body? If so, does it have any physiological effects? Is there any scientific evidence that these beads work? My feeling is that there must be very solid evidence for their effectiveness to justify the risks of choking and strangulation.
The scientific evidence
In my search for evidence, I got off to a great start when I found this posting by Scepticon. It gave me lots of references and analysed the situation very impressively. But I couldn’t take Scepticon’s word as authority, of course. I needed to find primary sources myself. (SCIENCE OR NOT)