This is not a both-sides-are-equal comparison. The evidence is clear: amber teething necklaces have no proven benefit and carry documented risks, including strangulation and choking. The FDA issued a formal safety warning in 2018, and the AAP recommends against their use. At least one infant death has been linked to an amber teething necklace.
The claimed mechanism — that body heat releases succinic acid from Baltic amber, which is then absorbed through the skin and acts as an anti-inflammatory — has not been validated in any peer-reviewed research. A 2019 study by Marchisio et al. tested the claim directly and found no measurable succinic acid release at body temperature. The necklaces do not work through the mechanism their proponents describe.
Teething toys, by contrast, use a well-understood mechanism: counter-pressure on the gums from biting relieves discomfort, and cold provides mild numbing. Our teething toys guide covers which designs are safest and most effective. These are the same principles behind gum massage, which pediatricians have recommended for decades. They are not glamorous, but they work and they are safe.