Alpha-carotene from veggies linked to longer life

Unlike beta-carotene, alpha-carotene is not often found in multivitamins or other common dietary supplements, which suggests that most of the quantities found in people's blood comes from food (primarily yellow-orange and dark green veggies, including broccoli, carrots, collards, green beans, lettuce, peas, pumpkin, spinach, sweet potatoes and winter squash). And a previous case-control study found that eating more of these sorts of alpha-carotene-rich veggies led to a decreased risk of lung cancer.