Whip up a Caesar salad to benefit from romaine’s high levels of two heart-healthy nutrients: Two cups (500 mL) of shredded romaine contain 40 percent of your daily needs of folate and 10 percent of fibre. A study done at Tulane University in New Orleans showed that the higher the level of folate in a person’s diet, the lower the risk of stroke and cardiovascular disease. Soluble fibre has been shown to reduce the level of LDL (low-density lipoprotein) or “bad” cholesterol.