Dr. Oz has a lot of great things to say, but sometimes he just plain goes off the rails. And unfortunately he has built up so much social currency that the general public takes his word as gospel, no matter how wacky or "out of left field" it may be. Thus, the sudden surge in interest in raspberry ketones.
Raspberry ketones: Not a magic fat cure
Regardless of what Dr. Oz may claim
Dr. Oz's people claim to be taken aback by the huge amount of interest in this product. Well what did they expect? The man touted it as a "fat-burner in a bottle." And even better, it comes from raspberries. You know what a raspberry is! You like them! They are tasty and familiar. Unlike a lot of other oddball so-called miracle cures like goji berries or whatever.
So what is the truth about raspberry ketones? Well, there is some evidence that they may help burn fat. On the down side, all of that research - what little of it exists - was performed on cells in test tubes, and in laboratory mice. And unfortunately when it comes to complicated biological issues like fat storage, test tube and lab mice studies fail to pan out more often than not.
This is where I get really annoyed with Dr. Oz, because his website says "research has shown that raspberry ketone can help in your weight-loss efforts." Except that no, it doesn't. There is no research that shows that. No human trials of raspberry ketones have yet been performed.
There is research that shows that raspberry ketones can maybe help with the weight loss efforts of cells in a test tube, and of mice. It's not even very conclusive research, and there isn't very much of it. It certainly doesn't show that it can help in YOUR weight-loss efforts (unless you are cells in a test tube, or a mouse).
The good news, though, is that fresh raspberries continue to be really good for you. Aside from ketones, these richly-colored fruits are high in fiber, and a great source of nutrients including potassium, manganese, vitamin K, vitamin A, riboflavin, folic acid, and more. They are also rich in phytochemicals including quercitin, catechins, and anthocyanins, all of which have been high profile lately in the nutrition world.
Like so many weight loss hype products, the primary effect of raspberry ketones is to lighten up your wallet. And it's just one more reason not to trust Dr. Oz's particular flavor of pseudo-science.