"I could see how it could go the other way for some people," the 2016 hopeful said
"I’m not going to tell you why it wasn’t accurate," Christie said.
Regulators reached settlements with four companies accused of deceptive advertising.
The agency said the weight loss products can cause "serious harm."
Christie would not reveal how many pounds he has lost.
The N.J. governor wouldn't say how man pounds he's lost.