Lycopene and beta-cryptoxanthin are carotenoids found in a small number of foods. Unlike lycopene, beta-cryptoxanthin is among the 10% of carotenoids that can form vitamin A. Lycopene is primarily found in tomatoes and tomato-based products, but also in pink grapefruit and pink guava. Beta-cryptoxanthin is primarily found in tangerines, oranges, pumpkin, peaches, and papayas. Tomatoes and tomato products contain very high concentrations of lycopene, but beta-cryptoxanthin is present in modest amounts, of about 2 to 3 mg per serving, even in its primary food sources. Lycopene is typically the most abundant carotenoid in the diet and in the blood. Despite its scarcity in foods, beta-cryptoxanthin is the third or fourth most abundant carotenoid in blood.