Dave O'Brien, founder/owner of Greenlight in Cohasset, Hingham, Pembroke and Duxbury spoke February 1 on the benefits of a plant based diet and oxygenating your body with wheatgrass.  Cohasset store manager Shawn McCormick spoke on behalf of his store and what they have to offer before introducing the founder.  Also from Greenlight was store employee Sheree McCormick, and wheatgrass grower and plant-based chef Roseangela O'Brien.  There were about 40 people in attendance at the lovely new Willcutt Commons.