Meet the Carotenoid Beta-Carotene | Bright yellow, orange, red, and some dark green fruits and vegetables are high in the carotenoids (e.g. beta-carotene or pro-vitamin A). Beta-carotene is the only source of plant-based vitamin A for vegans and absorption is dependent on dietary fat intake. As such, it is so important that vegans consume these foods with a source of dietary fat (e.g. olives, avocado, almond butter, nuts, seeds, coconut flakes, olive oil, etc.).