Drop the acid

There's been a bit of back-and-forth over whether or not conjugated linoleic acid (CLA) is safe to take as a weight loss aid. Though some research does show that this compound -- which is naturally found in some meat and dairy products, as well as in supplement form -- can reduce body fat. But one very big problem persisted: It caused insulin resistance.

However, a recent study in mice found that the hormone leptin adds an element of protection against side effects that can accompany fat loss with CLA. While the efficacy of CLA as a fat-burner remains the same with or without the concurrent consumption of leptin, insulin resistance does not develop, say researchers from Ohio State University.

My two cents? Avoid supplementing with conjugated linoleic acid until more conclusive research on its safety is done. In the meantime, do weight loss the old fashioned way: follow a healthy diet and exercise regularly.