Dustin Poirier is one of the greatest lightweights the sport of MMA has ever seen. Since debuting in the UFC in 2011, the Louisiana native fought his way through the featherweight and lightweight divisions, fighting twice for the lightweight title. In 2019, he won the interim UFC lightweight world title. View this post on Instagram Instagram PostHis notable wins include Max Holloway, Justin Gaethje, Eddie Alvarez, and Conor McGregor (twice). Starting his career back in 2009, 'The Diamond' garnered a huge fanbase over time due to his fan-friendly fighting style, immense heart, and tremendous knockout power. All this is possible through the 35-year-old's intense training regimen and strict diet program.What is Dustin Poirier's diet?Dustin Poirier was a long-time client of well-known nutritionist George Lockhart, a former marine and MMA fighter himself. 'The Diamond' ensures he has all-natural food that allows him to have all nutrients like protein, carbs, and healthy fats.A day of dieting for Dustin Poirier during fight camp is as follows (via Celebrity Workout & Diet):Breakfast or snack:2.5 fluid ounces of low-fat kefir0.5 ounce or medium-sized banana1/2 tablespoon peanut butter1.5 ounces of oatmealTotal: 119 calories, 18 grams of protein, 63 grams of carbsLunch:21.4 ounces of water2.5 ounces of ground turkey breast (no skin)4.5 egg whites2.5 cups of spinach9.5 ounces of pineapple0.5 ounces olive oilTotal: 475 calories, 42 grams of protein, 27 grams of carbsSnack 2:21 ounces of water2.5 ounces of low-fat plain Greek yogurt0.5 cup grapes3 Brazil nutsTotal: 119 calories, 9 grams of protein, 13 grams of carbsDinner:21 ounces of water5.5 ounces Tilapiahalf medium lemon2.5 cups collard greens2 medium tomatoes0.5 tablespoon olive oilTotal: 475 calories, 38 grams of protein, 17 grams of carbsSnack 3:21 ounces of water2.5 ounces low-fat Greek yogurt1 cup blueberries2.5 ounces strawberries3 Brazil nutsTotal: 119 calories, 10 grams of protein, 31 grams of carbs. View this post on Instagram Instagram PostPoirier is now scheduled to fight for the belt for the third time at UFC 302, challenging Islam Makhachev for the UFC lightweight throne. He has teased a potential retirement after the bout, regardless of the outcome. UFC 302 transpires inside the Prudential Center in Newark, New Jersey on June 1.