Advocates like how it helps the body and the planet
                                
                                
                                    (Newser) -
                                    Everyone's always on the hunt for the next superfood, and both  Grist  and  Scientific American  have articles making the case for ... seaweed. Or more specifically, kelp. One big reason: It's not only good for the body, it's good for the planet. Kelp is packed with vitamins, calcium,...