Backed by a single simple study with too small a sample size and little or no control group, paid for by the group currently making the claim (a group who may have commissioned several other studies but didn't have them published because the results were not as complimentary to their cause).
Backed by a single simple study with too small a sample size and little or no control group, paid for by the group currently making the claim (a group who may have commissioned several other studies but didn't have them published because the results were not as complimentary to their cause).