There are a few products out there boasting that. One claims to elevate T3 (I believe) output from the thyroid in order to increase metabolism. Another states that it maintains thyroid health: when you drop your caloric intake, your thyroid tends to slow down your metabolism in order to conserve body fat; this product keeps it going at a normal rate in order to prevent this.
-------------- Michael
"Trample the weak; hurdle the dead!"