Collard greens are low in calories, have no cholesterol and rich in fiber.  The phytonutrient diindolylmethane has antibacterial and antiviral properties. Vitamin C in collard greens boosts the immune system and helps prevent flu-like viral infections. Collard greens contain vitamin A which is responsible for promoting healthy mucus membranes, skin and vision. Vitamin K helps promote healthy bones.  Collard greens are also a good source of B vitamins, iron, calcium, copper, manganese, selenium and zinc.

The dietary fiber in collard greens helps control LDL cholesterol and prevents hemorrhoids, constipation and colon cancer. The phytonutrients in collard greens have anti-cancer properties. They can prevent prostate, breast, cervical, colon and ovarian cancers.  Collard greens contain folate. which helps prevent neural tube birth defects in newborns. Vitamin K in collard greens helps limit neuronal damage in the brain of patients with Alzheimer's disease.