Native to western North America, the Big-Leaved lupin is a perennial herbaceous plant with stout stems growing to 1.5 meters tall. As a matter of fact, this variety is commonly used in gardens for its attractiveness to bees and also for its ability to improve poor sandy soils with its nitrogen fixing ability and flowers. It is worth noting that eating lupins helps you consume more vitamins. For one, they provide a significant amount of thiamin, which is a vitamin essential for carbohydrate and fat metabolism, as well as maintaining nervous system function.