It is really hard to say because of the potential placebo effect, but honestly I did feel a bit peppier after I took them. Even if it is just a placebo, I still felt like I had more energy. Plus, I think the health benefits seem pretty legit. It's full of chlorophyll and tons of minerals. Way better than a multivitamin in my opinion. Website with more info: http://thechalkboardmag.com/50-reasons-to-drink-wheatgrass-everyday.