It depends on calories taken in but most importantly the macro nutrient ratio in peoples' diets. Macro nutrients are nutrients measure in grams (fat, carbs, protein, etc). A good macro ratio for leaning out is 1:1 (drastic) or 1:2 Protein to Carbs ratio and minimize fats. Unfortunately, due to lack of nutrition knowledge and failure to read nutrition facts, most vegans are pretty much living on mostly carbs and fats. Their ratios look more like 1:10:5 Protein To Carbs to Fats when it should be 1:2:0 Protein to Carbs to Fats. Fat goes to fat. Carbs go to refill your muscle's glycogen levels and then spill over into fat storage. Protein CANNOT go to fat. It can only go to muscle maintenance/building or it is excreted as waste. This is why it is important on any diet, especially a vegan diet, to make sure you're getting enough calories through protein. It is more difficult to tailor your macros to high protein without all of the excess carbs, but it is do able. Good vegan food protein sources black beans, lentils, split peas, chick peas, etc. However, they still have a 1:2 or 1:3 Protein to Carbs ratio. Some imitation meats are good as well but you have to look at the nutrition facts to make sure they're not loaded with fat and also don't come from soy. To assist in really tailoring your macros to up the protein calories, you need a vegan protein powder shake. These make it quick, easy, and delicious to get your protein and also throw in fruits and veggies (for micro nutrients) in a smoothie. I would recommend Vega Sport or Real Pro Life Nutrition. They are definitely the 2 best vegan protein shakes on the market. I hope this helps!